darkcomet | a2b7577b883311a9d059a719d269f1f5fc0abc30efaa7ba912925c5ba40681cc

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Windupdt\\winupdate.exe"	94d7bc9e260423579441e97426115344_JaffaCakes118.exe

Modifies firewall policy service 3 TTPs 3 IoCs

evasion

Modify Registry

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	winupdate.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "1"	winupdate.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	winupdate.exe

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	winupdate.exe

Disables Task Manager via registry modification
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	94d7bc9e260423579441e97426115344_JaffaCakes118.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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	94d7bc9e260423579441e97426115344_JaffaCakes118.exe

Executes dropped EXE 3 IoCs

pid	Process
2264	HOOKENGINE.EXE
964	winupdate.exe
2708	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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Windupdt\\winupdate.exe"	94d7bc9e260423579441e97426115344_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3228 set thread context of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 964 set thread context of 2708	964	winupdate.exe	87

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3228-0-0x0000000000400000-0x000000000052E000-memory.dmp	upx
behavioral2/memory/3228-6-0x0000000000400000-0x000000000052E000-memory.dmp	upx
behavioral2/files/0x000a000000023b9d-27.dat	upx
behavioral2/memory/964-92-0x0000000000400000-0x000000000052E000-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 5 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	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HOOKENGINE.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	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	94d7bc9e260423579441e97426115344_JaffaCakes118.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	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	94d7bc9e260423579441e97426115344_JaffaCakes118.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2708	winupdate.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeSecurityPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeSystemtimePrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeBackupPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeRestorePrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeShutdownPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeDebugPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeUndockPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeManageVolumePrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeImpersonatePrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 33	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 34	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 35	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 36	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
Token: 33	2264	HOOKENGINE.EXE
Token: SeIncBasePriorityPrivilege	2264	HOOKENGINE.EXE
Token: SeIncreaseQuotaPrivilege	2708	winupdate.exe
Token: SeSecurityPrivilege	2708	winupdate.exe
Token: SeTakeOwnershipPrivilege	2708	winupdate.exe
Token: SeLoadDriverPrivilege	2708	winupdate.exe
Token: SeSystemProfilePrivilege	2708	winupdate.exe
Token: SeSystemtimePrivilege	2708	winupdate.exe
Token: SeProfSingleProcessPrivilege	2708	winupdate.exe
Token: SeIncBasePriorityPrivilege	2708	winupdate.exe
Token: SeCreatePagefilePrivilege	2708	winupdate.exe
Token: SeBackupPrivilege	2708	winupdate.exe
Token: SeRestorePrivilege	2708	winupdate.exe
Token: SeShutdownPrivilege	2708	winupdate.exe
Token: SeDebugPrivilege	2708	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2708	winupdate.exe
Token: SeChangeNotifyPrivilege	2708	winupdate.exe
Token: SeRemoteShutdownPrivilege	2708	winupdate.exe
Token: SeUndockPrivilege	2708	winupdate.exe
Token: SeManageVolumePrivilege	2708	winupdate.exe
Token: SeImpersonatePrivilege	2708	winupdate.exe
Token: SeCreateGlobalPrivilege	2708	winupdate.exe
Token: 33	2708	winupdate.exe
Token: 34	2708	winupdate.exe
Token: 35	2708	winupdate.exe
Token: 36	2708	winupdate.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe
964	winupdate.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 3228 wrote to memory of 4900	3228	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	82
PID 4900 wrote to memory of 2264	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	83
PID 4900 wrote to memory of 2264	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	83
PID 4900 wrote to memory of 2264	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	83
PID 4900 wrote to memory of 964	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	84
PID 4900 wrote to memory of 964	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	84
PID 4900 wrote to memory of 964	4900	94d7bc9e260423579441e97426115344_JaffaCakes118.exe	84
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87
PID 964 wrote to memory of 2708	964	winupdate.exe	87

C:\Users\Admin\AppData\Local\Temp\94d7bc9e260423579441e97426115344_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\94d7bc9e260423579441e97426115344_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3228
- C:\Users\Admin\AppData\Local\Temp\94d7bc9e260423579441e97426115344_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\94d7bc9e260423579441e97426115344_JaffaCakes118.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
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4900
- - C:\Users\Admin\AppData\Local\Temp\HOOKENGINE.EXE
    "C:\Users\Admin\AppData\Local\Temp\HOOKENGINE.EXE"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2264
- - C:\ProgramData\Microsoft\Windows\Start Menu\Windupdt\winupdate.exe
    "C:\ProgramData\Microsoft\Windows\Start Menu\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:964
  - - C:\ProgramData\Microsoft\Windows\Start Menu\Windupdt\winupdate.exe
      "C:\ProgramData\Microsoft\Windows\Start Menu\Windupdt\winupdate.exe"
      4⤵
      Modifies firewall policy service
      Disables RegEdit via registry modification
      Checks BIOS information in registry
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:2708

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 System Firewall

T1562.004

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery