darkcomet | e15f201d7561a7425144dd03e690af50ab3d3c66a3a24b6005e5c04d825d1fad

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe

Modifies security service 2 TTPs 1 IoCs

defense_evasion

Modify Registry

Windows Service

T1543.003

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	winupdate.exe

Windows security bypass 2 TTPs 2 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winupdate.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	winupdate.exe

Disables Task Manager via registry modification
defense_evasion

Checks BIOS information in registry 2 TTPs 2 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\SystemBiosDate	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe

Executes dropped EXE 2 IoCs

pid	Process
2964	winupdate.exe
976	winupdate.exe

Windows security modification 2 TTPs 2 IoCs

defense_evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	winupdate.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winupdate.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1528 set thread context of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 2964 set thread context of 976	2964	winupdate.exe	84

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1528-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/1528-7-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/files/0x000a000000023b75-15.dat	upx
behavioral2/memory/2964-31-0x0000000000400000-0x0000000000416000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe

Checks processor information in registry 2 TTPs 8 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winupdate.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
976	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeSecurityPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeTakeOwnershipPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeLoadDriverPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeSystemProfilePrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeSystemtimePrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeProfSingleProcessPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeIncBasePriorityPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeCreatePagefilePrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeBackupPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeRestorePrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeShutdownPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeDebugPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeSystemEnvironmentPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeChangeNotifyPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeRemoteShutdownPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeUndockPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeManageVolumePrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeImpersonatePrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeCreateGlobalPrivilege	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: 33	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: 34	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: 35	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: 36	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
Token: SeIncreaseQuotaPrivilege	976	winupdate.exe
Token: SeSecurityPrivilege	976	winupdate.exe
Token: SeTakeOwnershipPrivilege	976	winupdate.exe
Token: SeLoadDriverPrivilege	976	winupdate.exe
Token: SeSystemProfilePrivilege	976	winupdate.exe
Token: SeSystemtimePrivilege	976	winupdate.exe
Token: SeProfSingleProcessPrivilege	976	winupdate.exe
Token: SeIncBasePriorityPrivilege	976	winupdate.exe
Token: SeCreatePagefilePrivilege	976	winupdate.exe
Token: SeBackupPrivilege	976	winupdate.exe
Token: SeRestorePrivilege	976	winupdate.exe
Token: SeShutdownPrivilege	976	winupdate.exe
Token: SeDebugPrivilege	976	winupdate.exe
Token: SeSystemEnvironmentPrivilege	976	winupdate.exe
Token: SeChangeNotifyPrivilege	976	winupdate.exe
Token: SeRemoteShutdownPrivilege	976	winupdate.exe
Token: SeUndockPrivilege	976	winupdate.exe
Token: SeManageVolumePrivilege	976	winupdate.exe
Token: SeImpersonatePrivilege	976	winupdate.exe
Token: SeCreateGlobalPrivilege	976	winupdate.exe
Token: 33	976	winupdate.exe
Token: 34	976	winupdate.exe
Token: 35	976	winupdate.exe
Token: 36	976	winupdate.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
2964	winupdate.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1528 wrote to memory of 1968	1528	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	82
PID 1968 wrote to memory of 2964	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	83
PID 1968 wrote to memory of 2964	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	83
PID 1968 wrote to memory of 2964	1968	JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe	83
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84
PID 2964 wrote to memory of 976	2964	winupdate.exe	84

System policy modification 1 TTPs 3 IoCs

defense_evasion

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion	winupdate.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern	winupdate.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1"	winupdate.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1528
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5e0a7385a395af2f768f9060b67b512.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1968
- - C:\Windupdt\winupdate.exe
    "C:\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2964
  - - C:\Windupdt\winupdate.exe
      C:\Windupdt\winupdate.exe
      4⤵
      Modifies security service
      Windows security bypass
      Checks BIOS information in registry
      Executes dropped EXE
      Windows security modification
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      System policy modification
      PID:976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery