darkcomet | 88cb99698a160db280ec6b4f86a9c2b330ad8039762c45895b09f31831ce4945

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winlogon.exe

Executes dropped EXE 1 IoCs

pid	Process
4540	winlogon.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System64 = "\"C:\\Windows\\system32\\logon.exe\""	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\logon.exe	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe
File opened for modification	C:\Windows\SysWOW64\logon.exe	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1476 set thread context of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87

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_3eb2734ea88707283b3eb88ccc469753.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winlogon.exe

Checks processor information in registry 2 TTPs 4 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\VendorIdentifier	winlogon.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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winlogon.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4540	winlogon.exe
Token: SeSecurityPrivilege	4540	winlogon.exe
Token: SeTakeOwnershipPrivilege	4540	winlogon.exe
Token: SeLoadDriverPrivilege	4540	winlogon.exe
Token: SeSystemProfilePrivilege	4540	winlogon.exe
Token: SeSystemtimePrivilege	4540	winlogon.exe
Token: SeProfSingleProcessPrivilege	4540	winlogon.exe
Token: SeIncBasePriorityPrivilege	4540	winlogon.exe
Token: SeCreatePagefilePrivilege	4540	winlogon.exe
Token: SeBackupPrivilege	4540	winlogon.exe
Token: SeRestorePrivilege	4540	winlogon.exe
Token: SeShutdownPrivilege	4540	winlogon.exe
Token: SeDebugPrivilege	4540	winlogon.exe
Token: SeSystemEnvironmentPrivilege	4540	winlogon.exe
Token: SeChangeNotifyPrivilege	4540	winlogon.exe
Token: SeRemoteShutdownPrivilege	4540	winlogon.exe
Token: SeUndockPrivilege	4540	winlogon.exe
Token: SeManageVolumePrivilege	4540	winlogon.exe
Token: SeImpersonatePrivilege	4540	winlogon.exe
Token: SeCreateGlobalPrivilege	4540	winlogon.exe
Token: 33	4540	winlogon.exe
Token: 34	4540	winlogon.exe
Token: 35	4540	winlogon.exe
Token: 36	4540	winlogon.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4540	winlogon.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87
PID 1476 wrote to memory of 4540	1476	JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe	87

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_3eb2734ea88707283b3eb88ccc469753.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1476
- C:\Users\Admin\AppData\Roaming\winlogon.exe
  C:\Users\Admin\AppData\Roaming\winlogon.exe
  2⤵
  - 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 use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4540

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

3

System Information Discovery

3

System Location Discovery

T1614

System Language Discovery