darkcomet | 300b2870be148cdec74fa42544a6669f7edc2e3cd6269f067fb5129e8f55f20c

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

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

Windows Service

T1543.003

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

Windows security bypass 2 TTPs 1 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

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	GOlfito.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Executes dropped EXE 3 IoCs

pid	Process
2896	MINIGOLF.EXE
2736	winupdate.exe
2984	winupdate.exe

Loads dropped DLL 10 IoCs

pid	Process
2600	GOlfito.exe
2600	GOlfito.exe
2600	GOlfito.exe
2736	winupdate.exe
2736	winupdate.exe
2736	winupdate.exe
2736	winupdate.exe
2984	winupdate.exe
2984	winupdate.exe
2984	winupdate.exe

Windows security modification 2 TTPs 1 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

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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windows\\Windupdt\\winupdate.exe"	GOlfito.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2180 set thread context of 2600	2180	GOlfito.exe	30
PID 2736 set thread context of 2984	2736	winupdate.exe	33

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\Windupdt\winupdate.exe	GOlfito.exe
File opened for modification	C:\Windows\Windupdt\winupdate.exe	GOlfito.exe
File opened for modification	C:\Windows\Windupdt\	GOlfito.exe
File opened for modification	C:\Windows\Windupdt\winupdate.exe	winupdate.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 5 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	GOlfito.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GOlfito.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MINIGOLF.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.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\VendorIdentifier	winupdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	GOlfito.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	GOlfito.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	GOlfito.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	GOlfito.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

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	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	GOlfito.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2984	winupdate.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2600	GOlfito.exe
Token: SeSecurityPrivilege	2600	GOlfito.exe
Token: SeTakeOwnershipPrivilege	2600	GOlfito.exe
Token: SeLoadDriverPrivilege	2600	GOlfito.exe
Token: SeSystemProfilePrivilege	2600	GOlfito.exe
Token: SeSystemtimePrivilege	2600	GOlfito.exe
Token: SeProfSingleProcessPrivilege	2600	GOlfito.exe
Token: SeIncBasePriorityPrivilege	2600	GOlfito.exe
Token: SeCreatePagefilePrivilege	2600	GOlfito.exe
Token: SeBackupPrivilege	2600	GOlfito.exe
Token: SeRestorePrivilege	2600	GOlfito.exe
Token: SeShutdownPrivilege	2600	GOlfito.exe
Token: SeDebugPrivilege	2600	GOlfito.exe
Token: SeSystemEnvironmentPrivilege	2600	GOlfito.exe
Token: SeChangeNotifyPrivilege	2600	GOlfito.exe
Token: SeRemoteShutdownPrivilege	2600	GOlfito.exe
Token: SeUndockPrivilege	2600	GOlfito.exe
Token: SeManageVolumePrivilege	2600	GOlfito.exe
Token: SeImpersonatePrivilege	2600	GOlfito.exe
Token: SeCreateGlobalPrivilege	2600	GOlfito.exe
Token: 33	2600	GOlfito.exe
Token: 34	2600	GOlfito.exe
Token: 35	2600	GOlfito.exe
Token: SeIncreaseQuotaPrivilege	2984	winupdate.exe
Token: SeSecurityPrivilege	2984	winupdate.exe
Token: SeTakeOwnershipPrivilege	2984	winupdate.exe
Token: SeLoadDriverPrivilege	2984	winupdate.exe
Token: SeSystemProfilePrivilege	2984	winupdate.exe
Token: SeSystemtimePrivilege	2984	winupdate.exe
Token: SeProfSingleProcessPrivilege	2984	winupdate.exe
Token: SeIncBasePriorityPrivilege	2984	winupdate.exe
Token: SeCreatePagefilePrivilege	2984	winupdate.exe
Token: SeBackupPrivilege	2984	winupdate.exe
Token: SeRestorePrivilege	2984	winupdate.exe
Token: SeShutdownPrivilege	2984	winupdate.exe
Token: SeDebugPrivilege	2984	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2984	winupdate.exe
Token: SeChangeNotifyPrivilege	2984	winupdate.exe
Token: SeRemoteShutdownPrivilege	2984	winupdate.exe
Token: SeUndockPrivilege	2984	winupdate.exe
Token: SeManageVolumePrivilege	2984	winupdate.exe
Token: SeImpersonatePrivilege	2984	winupdate.exe
Token: SeCreateGlobalPrivilege	2984	winupdate.exe
Token: 33	2984	winupdate.exe
Token: 34	2984	winupdate.exe
Token: 35	2984	winupdate.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2180	GOlfito.exe
2736	winupdate.exe
2984	winupdate.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2180 wrote to memory of 2600	2180	GOlfito.exe	30
PID 2600 wrote to memory of 2896	2600	GOlfito.exe	31
PID 2600 wrote to memory of 2896	2600	GOlfito.exe	31
PID 2600 wrote to memory of 2896	2600	GOlfito.exe	31
PID 2600 wrote to memory of 2896	2600	GOlfito.exe	31
PID 2600 wrote to memory of 2736	2600	GOlfito.exe	32
PID 2600 wrote to memory of 2736	2600	GOlfito.exe	32
PID 2600 wrote to memory of 2736	2600	GOlfito.exe	32
PID 2600 wrote to memory of 2736	2600	GOlfito.exe	32
PID 2600 wrote to memory of 2736	2600	GOlfito.exe	32
PID 2600 wrote to memory of 2736	2600	GOlfito.exe	32
PID 2600 wrote to memory of 2736	2600	GOlfito.exe	32
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33
PID 2736 wrote to memory of 2984	2736	winupdate.exe	33

C:\Users\Admin\AppData\Local\Temp\GOlfito.exe
"C:\Users\Admin\AppData\Local\Temp\GOlfito.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Users\Admin\AppData\Local\Temp\GOlfito.exe
  "C:\Users\Admin\AppData\Local\Temp\GOlfito.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in Windows directory
  - 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:2600
- - C:\Users\Admin\AppData\Local\Temp\MINIGOLF.EXE
    "C:\Users\Admin\AppData\Local\Temp\MINIGOLF.EXE"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2896
- - C:\Windows\Windupdt\winupdate.exe
    "C:\Windows\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2736
  - - C:\Windows\Windupdt\winupdate.exe
      "C:\Windows\Windupdt\winupdate.exe"
      4⤵
      Modifies security service
      Windows security bypass
      Checks BIOS information in registry
      Executes dropped EXE
      Loads dropped DLL
      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
      PID:2984

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

System Information Discovery