darkcomet | 904e180b5468b3c91feee425e0ebcd68b33b81ffef5ad3130aa3ab0f388d4994

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe

Modifies security service 2 TTPs 1 IoCs

defense_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 2 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\UpdatesDisableNotify = "1"	winupdate.exe

Disables RegEdit via registry modification 1 IoCs

defense_evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "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_49a345d4194d28036d1430645f7519e7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.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	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe

Executes dropped EXE 2 IoCs

pid	Process
4200	winupdate.exe
1244	winupdate.exe

Windows security modification 2 TTPs 2 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\UpdatesDisableNotify = "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-1-5-21-1874072718-2205492803-118941907-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/memory/5088-24-0x0000000000400000-0x00000000004E2000-memory.dmp	autoit_exe
behavioral2/memory/4200-103-0x0000000000400000-0x00000000004E2000-memory.dmp	autoit_exe

Drops autorun.inf file 1 TTPs 4 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	F:\autorun.inf	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
File opened for modification	F:\\autorun.inf	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
File opened for modification	F:\autorun.inf	winupdate.exe
File opened for modification	F:\\autorun.inf	winupdate.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5088 set thread context of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 4200 set thread context of 1244	4200	winupdate.exe	90

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5088-0-0x0000000000400000-0x00000000004E2000-memory.dmp	upx
behavioral2/files/0x000a000000023be9-22.dat	upx
behavioral2/memory/5088-24-0x0000000000400000-0x00000000004E2000-memory.dmp	upx
behavioral2/memory/4200-103-0x0000000000400000-0x00000000004E2000-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 6 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_49a345d4194d28036d1430645f7519e7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winupdate.exe
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

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
860	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_49a345d4194d28036d1430645f7519e7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	JaffaCakes118_49a345d4194d28036d1430645f7519e7.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_49a345d4194d28036d1430645f7519e7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	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	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
860	PING.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1244	winupdate.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeSecurityPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeTakeOwnershipPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeLoadDriverPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeSystemProfilePrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeSystemtimePrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeProfSingleProcessPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeIncBasePriorityPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeCreatePagefilePrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeBackupPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeRestorePrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeShutdownPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeDebugPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeSystemEnvironmentPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeChangeNotifyPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeRemoteShutdownPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeUndockPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeManageVolumePrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeImpersonatePrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeCreateGlobalPrivilege	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: 33	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: 34	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: 35	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: 36	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
Token: SeIncreaseQuotaPrivilege	1244	winupdate.exe
Token: SeSecurityPrivilege	1244	winupdate.exe
Token: SeTakeOwnershipPrivilege	1244	winupdate.exe
Token: SeLoadDriverPrivilege	1244	winupdate.exe
Token: SeSystemProfilePrivilege	1244	winupdate.exe
Token: SeSystemtimePrivilege	1244	winupdate.exe
Token: SeProfSingleProcessPrivilege	1244	winupdate.exe
Token: SeIncBasePriorityPrivilege	1244	winupdate.exe
Token: SeCreatePagefilePrivilege	1244	winupdate.exe
Token: SeBackupPrivilege	1244	winupdate.exe
Token: SeRestorePrivilege	1244	winupdate.exe
Token: SeShutdownPrivilege	1244	winupdate.exe
Token: SeDebugPrivilege	1244	winupdate.exe
Token: SeSystemEnvironmentPrivilege	1244	winupdate.exe
Token: SeChangeNotifyPrivilege	1244	winupdate.exe
Token: SeRemoteShutdownPrivilege	1244	winupdate.exe
Token: SeUndockPrivilege	1244	winupdate.exe
Token: SeManageVolumePrivilege	1244	winupdate.exe
Token: SeImpersonatePrivilege	1244	winupdate.exe
Token: SeCreateGlobalPrivilege	1244	winupdate.exe
Token: 33	1244	winupdate.exe
Token: 34	1244	winupdate.exe
Token: 35	1244	winupdate.exe
Token: 36	1244	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1244	winupdate.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 5088 wrote to memory of 4516	5088	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	85
PID 4516 wrote to memory of 4200	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	87
PID 4516 wrote to memory of 4200	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	87
PID 4516 wrote to memory of 4200	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	87
PID 4516 wrote to memory of 4104	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	88
PID 4516 wrote to memory of 4104	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	88
PID 4516 wrote to memory of 4104	4516	JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe	88
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4200 wrote to memory of 1244	4200	winupdate.exe	90
PID 4104 wrote to memory of 860	4104	cmd.exe	92
PID 4104 wrote to memory of 860	4104	cmd.exe	92
PID 4104 wrote to memory of 860	4104	cmd.exe	92

System policy modification 1 TTPs 3 IoCs

defense_evasion

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion	winupdate.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern	winupdate.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1"	winupdate.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe"
1⤵
- Drops autorun.inf file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5088
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_49a345d4194d28036d1430645f7519e7.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4516
- - C:\Windupdt\winupdate.exe
    "C:\Windupdt\winupdate.exe"
    3⤵
    - Executes dropped EXE
    - Drops autorun.inf file
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4200
  - - C:\Windupdt\winupdate.exe
      "C:\Windupdt\winupdate.exe"
      4⤵
      Modifies security service
      Windows security bypass
      Disables RegEdit via registry modification
      Checks BIOS information in registry
      Executes dropped EXE
      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
      System policy modification
      PID:1244
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\_dcsc_.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4104
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:860

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

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

Remote System Discovery

T1018

System Information Discovery