darkcomet | b827c6078ad83c5838d299a2fc09fef12b4a3a6874b9ba68ece83eb8d287c1a9

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

Modifies security service 2 TTPs 1 IoCs

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 1 IoCs

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

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	Crypted.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	bf23736194158362c62bc047048ce57c_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	Crypted.exe

Executes dropped EXE 2 IoCs

pid	Process
244	Crypted.exe
1456	winupdate.exe

Windows security modification 2 TTPs 1 IoCs

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

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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	Crypted.exe

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 3 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	bf23736194158362c62bc047048ce57c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Crypted.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 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
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Crypted.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Crypted.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Crypted.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	Crypted.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	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	Crypted.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1456	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	244	Crypted.exe
Token: SeSecurityPrivilege	244	Crypted.exe
Token: SeTakeOwnershipPrivilege	244	Crypted.exe
Token: SeLoadDriverPrivilege	244	Crypted.exe
Token: SeSystemProfilePrivilege	244	Crypted.exe
Token: SeSystemtimePrivilege	244	Crypted.exe
Token: SeProfSingleProcessPrivilege	244	Crypted.exe
Token: SeIncBasePriorityPrivilege	244	Crypted.exe
Token: SeCreatePagefilePrivilege	244	Crypted.exe
Token: SeBackupPrivilege	244	Crypted.exe
Token: SeRestorePrivilege	244	Crypted.exe
Token: SeShutdownPrivilege	244	Crypted.exe
Token: SeDebugPrivilege	244	Crypted.exe
Token: SeSystemEnvironmentPrivilege	244	Crypted.exe
Token: SeChangeNotifyPrivilege	244	Crypted.exe
Token: SeRemoteShutdownPrivilege	244	Crypted.exe
Token: SeUndockPrivilege	244	Crypted.exe
Token: SeManageVolumePrivilege	244	Crypted.exe
Token: SeImpersonatePrivilege	244	Crypted.exe
Token: SeCreateGlobalPrivilege	244	Crypted.exe
Token: 33	244	Crypted.exe
Token: 34	244	Crypted.exe
Token: 35	244	Crypted.exe
Token: 36	244	Crypted.exe
Token: SeIncreaseQuotaPrivilege	1456	winupdate.exe
Token: SeSecurityPrivilege	1456	winupdate.exe
Token: SeTakeOwnershipPrivilege	1456	winupdate.exe
Token: SeLoadDriverPrivilege	1456	winupdate.exe
Token: SeSystemProfilePrivilege	1456	winupdate.exe
Token: SeSystemtimePrivilege	1456	winupdate.exe
Token: SeProfSingleProcessPrivilege	1456	winupdate.exe
Token: SeIncBasePriorityPrivilege	1456	winupdate.exe
Token: SeCreatePagefilePrivilege	1456	winupdate.exe
Token: SeBackupPrivilege	1456	winupdate.exe
Token: SeRestorePrivilege	1456	winupdate.exe
Token: SeShutdownPrivilege	1456	winupdate.exe
Token: SeDebugPrivilege	1456	winupdate.exe
Token: SeSystemEnvironmentPrivilege	1456	winupdate.exe
Token: SeChangeNotifyPrivilege	1456	winupdate.exe
Token: SeRemoteShutdownPrivilege	1456	winupdate.exe
Token: SeUndockPrivilege	1456	winupdate.exe
Token: SeManageVolumePrivilege	1456	winupdate.exe
Token: SeImpersonatePrivilege	1456	winupdate.exe
Token: SeCreateGlobalPrivilege	1456	winupdate.exe
Token: 33	1456	winupdate.exe
Token: 34	1456	winupdate.exe
Token: 35	1456	winupdate.exe
Token: 36	1456	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1456	winupdate.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 244	2036	bf23736194158362c62bc047048ce57c_JaffaCakes118.exe	83
PID 2036 wrote to memory of 244	2036	bf23736194158362c62bc047048ce57c_JaffaCakes118.exe	83
PID 2036 wrote to memory of 244	2036	bf23736194158362c62bc047048ce57c_JaffaCakes118.exe	83
PID 244 wrote to memory of 1456	244	Crypted.exe	84
PID 244 wrote to memory of 1456	244	Crypted.exe	84
PID 244 wrote to memory of 1456	244	Crypted.exe	84

C:\Users\Admin\AppData\Local\Temp\bf23736194158362c62bc047048ce57c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\bf23736194158362c62bc047048ce57c_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Users\Admin\AppData\Local\Temp\Crypted.exe
  "C:\Users\Admin\AppData\Local\Temp\Crypted.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Executes dropped EXE
  - 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:244
- - C:\Windupdt\winupdate.exe
    "C:\Windupdt\winupdate.exe"
    3⤵
    - 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
    - Suspicious use of SetWindowsHookEx
    PID:1456

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