darkcomet | a7c388734a4f7fbd78ed00f4821461a05519d9a24f937a7dd1b887e84f1db741

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	tmp272.tmp.exe

Windows security bypass 2 TTPs 3 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"	winupdate.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	explorer.exe

Disables Task Manager via registry modification
defense_evasion

Checks BIOS information in registry 2 TTPs 4 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	tmp272.tmp.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	explorer.exe

Executes dropped EXE 2 IoCs

pid	Process
2816	tmp272.tmp.exe
2956	winupdate.exe

Windows security modification 2 TTPs 1 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"	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-1-5-21-4154726816-2055034831-2297277433-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	tmp272.tmp.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2956 set thread context of 1788	2956	winupdate.exe	91
PID 2816 set thread context of 5316	2816	tmp272.tmp.exe	92

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	ping.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmp272.tmp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4720	ping.exe

Checks processor information in registry 2 TTPs 16 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\ProcessorNameString	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	tmp272.tmp.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	tmp272.tmp.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	tmp272.tmp.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	tmp272.tmp.exe

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	tmp272.tmp.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4720	ping.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4988	jaffacakes118__753b062a4117e6779287fb78cb7805b8.exe
Token: SeIncreaseQuotaPrivilege	2816	tmp272.tmp.exe
Token: SeSecurityPrivilege	2816	tmp272.tmp.exe
Token: SeTakeOwnershipPrivilege	2816	tmp272.tmp.exe
Token: SeLoadDriverPrivilege	2816	tmp272.tmp.exe
Token: SeSystemProfilePrivilege	2816	tmp272.tmp.exe
Token: SeSystemtimePrivilege	2816	tmp272.tmp.exe
Token: SeProfSingleProcessPrivilege	2816	tmp272.tmp.exe
Token: SeIncBasePriorityPrivilege	2816	tmp272.tmp.exe
Token: SeCreatePagefilePrivilege	2816	tmp272.tmp.exe
Token: SeBackupPrivilege	2816	tmp272.tmp.exe
Token: SeRestorePrivilege	2816	tmp272.tmp.exe
Token: SeShutdownPrivilege	2816	tmp272.tmp.exe
Token: SeDebugPrivilege	2816	tmp272.tmp.exe
Token: SeSystemEnvironmentPrivilege	2816	tmp272.tmp.exe
Token: SeChangeNotifyPrivilege	2816	tmp272.tmp.exe
Token: SeRemoteShutdownPrivilege	2816	tmp272.tmp.exe
Token: SeUndockPrivilege	2816	tmp272.tmp.exe
Token: SeManageVolumePrivilege	2816	tmp272.tmp.exe
Token: SeImpersonatePrivilege	2816	tmp272.tmp.exe
Token: SeCreateGlobalPrivilege	2816	tmp272.tmp.exe
Token: 33	2816	tmp272.tmp.exe
Token: 34	2816	tmp272.tmp.exe
Token: 35	2816	tmp272.tmp.exe
Token: 36	2816	tmp272.tmp.exe
Token: SeIncreaseQuotaPrivilege	2956	winupdate.exe
Token: SeSecurityPrivilege	2956	winupdate.exe
Token: SeTakeOwnershipPrivilege	2956	winupdate.exe
Token: SeLoadDriverPrivilege	2956	winupdate.exe
Token: SeSystemProfilePrivilege	2956	winupdate.exe
Token: SeSystemtimePrivilege	2956	winupdate.exe
Token: SeProfSingleProcessPrivilege	2956	winupdate.exe
Token: SeIncBasePriorityPrivilege	2956	winupdate.exe
Token: SeCreatePagefilePrivilege	2956	winupdate.exe
Token: SeBackupPrivilege	2956	winupdate.exe
Token: SeRestorePrivilege	2956	winupdate.exe
Token: SeShutdownPrivilege	2956	winupdate.exe
Token: SeDebugPrivilege	2956	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2956	winupdate.exe
Token: SeChangeNotifyPrivilege	2956	winupdate.exe
Token: SeRemoteShutdownPrivilege	2956	winupdate.exe
Token: SeUndockPrivilege	2956	winupdate.exe
Token: SeManageVolumePrivilege	2956	winupdate.exe
Token: SeImpersonatePrivilege	2956	winupdate.exe
Token: SeCreateGlobalPrivilege	2956	winupdate.exe
Token: 33	2956	winupdate.exe
Token: 34	2956	winupdate.exe
Token: 35	2956	winupdate.exe
Token: 36	2956	winupdate.exe
Token: SeIncreaseQuotaPrivilege	1788	explorer.exe
Token: SeSecurityPrivilege	1788	explorer.exe
Token: SeTakeOwnershipPrivilege	1788	explorer.exe
Token: SeLoadDriverPrivilege	1788	explorer.exe
Token: SeSystemProfilePrivilege	1788	explorer.exe
Token: SeSystemtimePrivilege	1788	explorer.exe
Token: SeProfSingleProcessPrivilege	1788	explorer.exe
Token: SeIncBasePriorityPrivilege	1788	explorer.exe
Token: SeCreatePagefilePrivilege	1788	explorer.exe
Token: SeBackupPrivilege	1788	explorer.exe
Token: SeRestorePrivilege	1788	explorer.exe
Token: SeShutdownPrivilege	1788	explorer.exe
Token: SeDebugPrivilege	1788	explorer.exe
Token: SeSystemEnvironmentPrivilege	1788	explorer.exe
Token: SeChangeNotifyPrivilege	1788	explorer.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 2816	4988	jaffacakes118__753b062a4117e6779287fb78cb7805b8.exe	88
PID 2956 wrote to memory of 1788	2956	winupdate.exe	91
PID 2956 wrote to memory of 1788	2956	winupdate.exe	91
PID 2816 wrote to memory of 5316	2816	tmp272.tmp.exe	92
PID 2816 wrote to memory of 5316	2816	tmp272.tmp.exe	92
PID 2816 wrote to memory of 4720	2816	tmp272.tmp.exe	93

C:\Users\Admin\AppData\Local\Temp\jaffacakes118__753b062a4117e6779287fb78cb7805b8.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118__753b062a4117e6779287fb78cb7805b8.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Users\Admin\AppData\Local\Temp\tmp272.tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp272.tmp.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - 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:2816
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Windows security bypass
    - Checks BIOS information in registry
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    PID:5316
- - C:\Windows\SysWOW64\ping.exe
    ping 127.0.0.1 -n 5 > NUL del "C:\Users\Admin\AppData\Local\Temp\tmp272.tmp.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4720

C:\Windupdt\winupdate.exe
C:\Windupdt\winupdate.exe
1⤵
- Windows security bypass
- Checks BIOS information in registry
- Executes dropped EXE
- Windows security modification
- Suspicious use of SetThreadContext
- 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:2956
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\SysWOW64\explorer.exe"
  2⤵
  - Windows security bypass
  - Checks BIOS information in registry
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:1788

Network

MITRE ATT&CK Enterprise v16

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

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