darkcomet | fd3e283c521b16fb084a54e33e3aece4f79786fd5421563461a08bb436845f1c

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\Windupdt\\winupdate.exe"	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe

Modifies firewall policy service 3 TTPs 3 IoCs

Modify Registry

Windows Service

Disable or Modify System Firewall

T1562.004

description	ioc	Process
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
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	winupdate.exe

Modifies security service 2 TTPs 1 IoCs

Modify Registry

Windows Service

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

Windows security bypass 2 TTPs 2 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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winupdate.exe

Disables RegEdit via registry modification 1 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\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	b561f1dd7998e4ea299420d0bb96fcec_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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
2428	winupdate.exe

Windows security modification 2 TTPs 2 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
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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sys = "C:\\Users\\Admin\\AppData\\Roaming\\Windupdt\\winupdate.exe"	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.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 2 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	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.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\Identifier	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	b561f1dd7998e4ea299420d0bb96fcec_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
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.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	b561f1dd7998e4ea299420d0bb96fcec_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\	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2428	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeSecurityPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeSystemtimePrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeBackupPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeRestorePrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeShutdownPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeDebugPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeUndockPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeManageVolumePrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeImpersonatePrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: 33	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: 34	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: 35	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: 36	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	2428	winupdate.exe
Token: SeSecurityPrivilege	2428	winupdate.exe
Token: SeTakeOwnershipPrivilege	2428	winupdate.exe
Token: SeLoadDriverPrivilege	2428	winupdate.exe
Token: SeSystemProfilePrivilege	2428	winupdate.exe
Token: SeSystemtimePrivilege	2428	winupdate.exe
Token: SeProfSingleProcessPrivilege	2428	winupdate.exe
Token: SeIncBasePriorityPrivilege	2428	winupdate.exe
Token: SeCreatePagefilePrivilege	2428	winupdate.exe
Token: SeBackupPrivilege	2428	winupdate.exe
Token: SeRestorePrivilege	2428	winupdate.exe
Token: SeShutdownPrivilege	2428	winupdate.exe
Token: SeDebugPrivilege	2428	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2428	winupdate.exe
Token: SeChangeNotifyPrivilege	2428	winupdate.exe
Token: SeRemoteShutdownPrivilege	2428	winupdate.exe
Token: SeUndockPrivilege	2428	winupdate.exe
Token: SeManageVolumePrivilege	2428	winupdate.exe
Token: SeImpersonatePrivilege	2428	winupdate.exe
Token: SeCreateGlobalPrivilege	2428	winupdate.exe
Token: 33	2428	winupdate.exe
Token: 34	2428	winupdate.exe
Token: 35	2428	winupdate.exe
Token: 36	2428	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2428	winupdate.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 412 wrote to memory of 4560	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe	83
PID 412 wrote to memory of 4560	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe	83
PID 412 wrote to memory of 4560	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe	83
PID 412 wrote to memory of 2428	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe	84
PID 412 wrote to memory of 2428	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe	84
PID 412 wrote to memory of 2428	412	b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe	84
PID 2428 wrote to memory of 924	2428	winupdate.exe	85
PID 2428 wrote to memory of 924	2428	winupdate.exe	85
PID 2428 wrote to memory of 924	2428	winupdate.exe	85

System policy modification 1 TTPs 3 IoCs

Modify Registry

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

C:\Users\Admin\AppData\Local\Temp\b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\b561f1dd7998e4ea299420d0bb96fcec_JaffaCakes118.exe"
1⤵
- 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:412
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\SysWOW64\explorer.exe"
  2⤵
  PID:4560
- C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe
  "C:\Users\Admin\AppData\Roaming\Windupdt\winupdate.exe"
  2⤵
  - Modifies firewall policy service
  - Modifies security service
  - Windows security bypass
  - Disables RegEdit via registry modification
  - 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
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:2428
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:924

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

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

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery