darkcomet | 58e243533df7be838434753ae8b68b5b603269a532b7567bf90a94ad25db80af

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.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-1-5-21-1874072718-2205492803-118941907-1000\Control Panel\International\Geo\Nation	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe

Executes dropped EXE 2 IoCs

pid	Process
1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
2392	winupdate.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-1-5-21-1874072718-2205492803-118941907-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3500 set thread context of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe
File opened for modification	C:\Windows\updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.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	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.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	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeSecurityPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeTakeOwnershipPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeLoadDriverPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeSystemProfilePrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeSystemtimePrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeProfSingleProcessPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeIncBasePriorityPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeCreatePagefilePrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeBackupPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeRestorePrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeShutdownPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeDebugPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeSystemEnvironmentPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeChangeNotifyPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeRemoteShutdownPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeUndockPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeManageVolumePrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeImpersonatePrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: SeCreateGlobalPrivilege	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: 33	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: 34	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: 35	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
Token: 36	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3500 wrote to memory of 4532	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	87
PID 3500 wrote to memory of 4532	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	87
PID 3500 wrote to memory of 4532	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	87
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 3500 wrote to memory of 1932	3500	JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe	88
PID 1932 wrote to memory of 2392	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe	89
PID 1932 wrote to memory of 2392	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe	89
PID 1932 wrote to memory of 2392	1932	updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe	89

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0f3fcc0d11d52a00d58999c09ae56893.exe"
1⤵
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3500
- C:\Windows\updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
  C:\Windows\updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
  2⤵
  PID:4532
- C:\Windows\updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.exe
  C:\Windows\updatemtKlkBqskKmRPxlHwnCMuuhhJReGZF.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:1932
- - C:\Windupdt\winupdate.exe
    "C:\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

4

System Information Discovery

5

System Location Discovery

T1614

System Language Discovery