darkcomet | e05fca6a1f09cc8f32eef7a5d494a5658599c293a9c57c7fc6a39e464cff5696

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

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\\Programs\\Windupdt\\winupdate.exe"	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

Windows Service

T1543.003

Processes:

winupdate.exe

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

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

winupdate.exe

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

evasion

Processes:

winupdate.exe

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "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

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exewinupdate.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	f28323cc645074a5bdb0d2bc862bdfe4_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

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

Processes:

winupdate.exewinupdate.exe

pid	Process
1100	winupdate.exe
3464	winupdate.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

winupdate.exe

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

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\Windupdt\\winupdate.exe"	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/memory/4748-0-0x0000000000400000-0x00000000004C2000-memory.dmp	autoit_exe
behavioral2/files/0x000800000002342a-11.dat	autoit_exe
behavioral2/memory/1100-69-0x0000000000400000-0x00000000004C2000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exewinupdate.exe

description	pid	Process	procid_target
PID 4748 set thread context of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 1100 set thread context of 3464	1100	winupdate.exe	94

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

System Information Discovery
T1082

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

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exewinupdate.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	f28323cc645074a5bdb0d2bc862bdfe4_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	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exewinupdate.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Modifies registry class 1 IoCs

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
3624	PING.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

winupdate.exe

pid	Process
3464	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exewinupdate.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeSecurityPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeSystemtimePrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeBackupPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeRestorePrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeShutdownPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeDebugPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeUndockPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeManageVolumePrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeImpersonatePrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: 33	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: 34	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: 35	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: 36	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	3464	winupdate.exe
Token: SeSecurityPrivilege	3464	winupdate.exe
Token: SeTakeOwnershipPrivilege	3464	winupdate.exe
Token: SeLoadDriverPrivilege	3464	winupdate.exe
Token: SeSystemProfilePrivilege	3464	winupdate.exe
Token: SeSystemtimePrivilege	3464	winupdate.exe
Token: SeProfSingleProcessPrivilege	3464	winupdate.exe
Token: SeIncBasePriorityPrivilege	3464	winupdate.exe
Token: SeCreatePagefilePrivilege	3464	winupdate.exe
Token: SeBackupPrivilege	3464	winupdate.exe
Token: SeRestorePrivilege	3464	winupdate.exe
Token: SeShutdownPrivilege	3464	winupdate.exe
Token: SeDebugPrivilege	3464	winupdate.exe
Token: SeSystemEnvironmentPrivilege	3464	winupdate.exe
Token: SeChangeNotifyPrivilege	3464	winupdate.exe
Token: SeRemoteShutdownPrivilege	3464	winupdate.exe
Token: SeUndockPrivilege	3464	winupdate.exe
Token: SeManageVolumePrivilege	3464	winupdate.exe
Token: SeImpersonatePrivilege	3464	winupdate.exe
Token: SeCreateGlobalPrivilege	3464	winupdate.exe
Token: 33	3464	winupdate.exe
Token: 34	3464	winupdate.exe
Token: 35	3464	winupdate.exe
Token: 36	3464	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

winupdate.exe

pid	Process
3464	winupdate.exe

Suspicious use of WriteProcessMemory 31 IoCs

Processes:

f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exef28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.execmd.exewinupdate.exe

description	pid	Process	procid_target
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 4748 wrote to memory of 5084	4748	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	85
PID 5084 wrote to memory of 1100	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	90
PID 5084 wrote to memory of 1100	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	90
PID 5084 wrote to memory of 1100	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	90
PID 5084 wrote to memory of 4896	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	91
PID 5084 wrote to memory of 4896	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	91
PID 5084 wrote to memory of 4896	5084	f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe	91
PID 4896 wrote to memory of 3624	4896	cmd.exe	93
PID 4896 wrote to memory of 3624	4896	cmd.exe	93
PID 4896 wrote to memory of 3624	4896	cmd.exe	93
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94
PID 1100 wrote to memory of 3464	1100	winupdate.exe	94

C:\Users\Admin\AppData\Local\Temp\f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4748
- C:\Users\Admin\AppData\Local\Temp\f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\f28323cc645074a5bdb0d2bc862bdfe4_JaffaCakes118.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - Checks processor information in registry
  - Enumerates system info in registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5084
- - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windupdt\winupdate.exe
    "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1100
  - - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windupdt\winupdate.exe
      "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windupdt\winupdate.exe"
      4⤵
      Modifies firewall policy service
      Windows security bypass
      Disables RegEdit via registry modification
      Checks BIOS information in registry
      Executes dropped EXE
      Windows security modification
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:3464
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\_dcsc_.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4896
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      Runs ping.exe
      PID:3624

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

Remote System Discovery

T1018

System Information Discovery