darkcomet | efed9072e94e504cb5c6132f7443d0fdc554cf2b7da83bd249fee761736409e1

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\winupdate.exe"	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe

Windows security bypass 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

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	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe

Deletes itself 1 IoCs

pid	Process
2896	cmd.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winupdate.exe	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winupdate.exe	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe

Executes dropped EXE 1 IoCs

pid	Process
328	winupdate.exe

Loads dropped DLL 4 IoCs

pid	Process
2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
328	winupdate.exe
328	winupdate.exe
328	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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\winupdate.exe"	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe

UPX packed file 19 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2020-0-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/files/0x000b0000000122cf-5.dat	upx
behavioral1/memory/328-20-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/2020-17-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-27-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-28-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-29-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-30-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-31-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-32-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-33-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-34-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-35-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-36-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-37-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-38-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-39-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-40-0x0000000000400000-0x00000000004F7000-memory.dmp	upx
behavioral1/memory/328-41-0x0000000000400000-0x00000000004F7000-memory.dmp	upx

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 4 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	winupdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.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
2760	PING.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\ProcessorNameString	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winupdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.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_000b722a553edea5e8ccfebbdf4c26e7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2760	PING.EXE

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeSecurityPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeTakeOwnershipPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeLoadDriverPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeSystemProfilePrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeSystemtimePrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeProfSingleProcessPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeIncBasePriorityPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeCreatePagefilePrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeBackupPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeRestorePrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeShutdownPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeDebugPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeSystemEnvironmentPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeChangeNotifyPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeRemoteShutdownPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeUndockPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeManageVolumePrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeImpersonatePrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeCreateGlobalPrivilege	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: 33	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: 34	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: 35	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
Token: SeIncreaseQuotaPrivilege	328	winupdate.exe
Token: SeSecurityPrivilege	328	winupdate.exe
Token: SeTakeOwnershipPrivilege	328	winupdate.exe
Token: SeLoadDriverPrivilege	328	winupdate.exe
Token: SeSystemProfilePrivilege	328	winupdate.exe
Token: SeSystemtimePrivilege	328	winupdate.exe
Token: SeProfSingleProcessPrivilege	328	winupdate.exe
Token: SeIncBasePriorityPrivilege	328	winupdate.exe
Token: SeCreatePagefilePrivilege	328	winupdate.exe
Token: SeBackupPrivilege	328	winupdate.exe
Token: SeRestorePrivilege	328	winupdate.exe
Token: SeShutdownPrivilege	328	winupdate.exe
Token: SeDebugPrivilege	328	winupdate.exe
Token: SeSystemEnvironmentPrivilege	328	winupdate.exe
Token: SeChangeNotifyPrivilege	328	winupdate.exe
Token: SeRemoteShutdownPrivilege	328	winupdate.exe
Token: SeUndockPrivilege	328	winupdate.exe
Token: SeManageVolumePrivilege	328	winupdate.exe
Token: SeImpersonatePrivilege	328	winupdate.exe
Token: SeCreateGlobalPrivilege	328	winupdate.exe
Token: 33	328	winupdate.exe
Token: 34	328	winupdate.exe
Token: 35	328	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
328	winupdate.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 328	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	31
PID 2020 wrote to memory of 328	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	31
PID 2020 wrote to memory of 328	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	31
PID 2020 wrote to memory of 328	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	31
PID 2020 wrote to memory of 328	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	31
PID 2020 wrote to memory of 328	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	31
PID 2020 wrote to memory of 328	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	31
PID 2020 wrote to memory of 2896	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	32
PID 2020 wrote to memory of 2896	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	32
PID 2020 wrote to memory of 2896	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	32
PID 2020 wrote to memory of 2896	2020	JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe	32
PID 2896 wrote to memory of 2760	2896	cmd.exe	34
PID 2896 wrote to memory of 2760	2896	cmd.exe	34
PID 2896 wrote to memory of 2760	2896	cmd.exe	34
PID 2896 wrote to memory of 2760	2896	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_000b722a553edea5e8ccfebbdf4c26e7.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Drops startup file
- 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:2020
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winupdate.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winupdate.exe"
  2⤵
  - 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 use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:328
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\_dcsc_.bat" "
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2896
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2760

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

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