darkcomet | a52b02e2f1023dcd1dfec407f2750f712638634354210772a5d712630e661d53

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\system32\\winlogon.exe"	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe

Modifies firewall policy service 3 TTPs 3 IoCs

defense_evasion

Modify Registry

Windows Service

Disable or Modify System Firewall

T1562.004

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

Modifies security service 2 TTPs 1 IoCs

defense_evasion

Modify Registry

Windows Service

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4"	winlogon.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\AntiVirusDisableNotify = "1"	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winlogon.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	winlogon.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe

Executes dropped EXE 1 IoCs

pid	Process
1500	winlogon.exe

Loads dropped DLL 2 IoCs

pid	Process
3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.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"	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winlogon.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-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\winlogon = "C:\\system32\\winlogon.exe"	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.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	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winlogon.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	winlogon.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winlogon.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winlogon.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winlogon.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	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winlogon.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1500	winlogon.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeSecurityPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeTakeOwnershipPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeLoadDriverPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeSystemProfilePrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeSystemtimePrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeProfSingleProcessPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeIncBasePriorityPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeCreatePagefilePrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeBackupPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeRestorePrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeShutdownPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeDebugPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeSystemEnvironmentPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeChangeNotifyPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeRemoteShutdownPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeUndockPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeManageVolumePrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeImpersonatePrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeCreateGlobalPrivilege	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: 33	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: 34	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: 35	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
Token: SeIncreaseQuotaPrivilege	1500	winlogon.exe
Token: SeSecurityPrivilege	1500	winlogon.exe
Token: SeTakeOwnershipPrivilege	1500	winlogon.exe
Token: SeLoadDriverPrivilege	1500	winlogon.exe
Token: SeSystemProfilePrivilege	1500	winlogon.exe
Token: SeSystemtimePrivilege	1500	winlogon.exe
Token: SeProfSingleProcessPrivilege	1500	winlogon.exe
Token: SeIncBasePriorityPrivilege	1500	winlogon.exe
Token: SeCreatePagefilePrivilege	1500	winlogon.exe
Token: SeBackupPrivilege	1500	winlogon.exe
Token: SeRestorePrivilege	1500	winlogon.exe
Token: SeShutdownPrivilege	1500	winlogon.exe
Token: SeDebugPrivilege	1500	winlogon.exe
Token: SeSystemEnvironmentPrivilege	1500	winlogon.exe
Token: SeChangeNotifyPrivilege	1500	winlogon.exe
Token: SeRemoteShutdownPrivilege	1500	winlogon.exe
Token: SeUndockPrivilege	1500	winlogon.exe
Token: SeManageVolumePrivilege	1500	winlogon.exe
Token: SeImpersonatePrivilege	1500	winlogon.exe
Token: SeCreateGlobalPrivilege	1500	winlogon.exe
Token: 33	1500	winlogon.exe
Token: 34	1500	winlogon.exe
Token: 35	1500	winlogon.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1500	winlogon.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3036 wrote to memory of 1500	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe	30
PID 3036 wrote to memory of 1500	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe	30
PID 3036 wrote to memory of 1500	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe	30
PID 3036 wrote to memory of 1500	3036	JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe	30

System policy modification 1 TTPs 3 IoCs

defense_evasion

Modify Registry

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

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ee07d267f13cef6b000817cccd2d99c3.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Loads dropped DLL
- 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:3036
- C:\system32\winlogon.exe
  "C:\system32\winlogon.exe"
  2⤵
  - Modifies firewall policy service
  - 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
  - System policy modification
  PID:1500

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