darkcomet | 0e9fb7a333bdd047f8e3e3cee9eb02296bdaf8be408071c964e4cde448005080

Windows Service

Disable or Modify System Firewall

T1562.004

Processes:

winkey.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	winkey.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "1"	winkey.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	winkey.exe

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

Windows Service

Processes:

winkey.exe

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

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

winkey.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	winkey.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winkey.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

winkey.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winkey.exe

Executes dropped EXE 2 IoCs

Processes:

winkey.exewinkey.exe

pid	Process
2736	winkey.exe
2788	winkey.exe

Loads dropped DLL 6 IoCs

Processes:

907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exewinkey.exe

pid	Process
2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe
2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe
2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe
2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe
2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe
2736	winkey.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

winkey.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	winkey.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	winkey.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\winkey = "C:\\Users\\Admin\\AppData\\Roaming\\winkey.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

winkey.exe

description	pid	Process	procid_target
PID 2736 set thread context of 2788	2736	winkey.exe	33

UPX packed file 29 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2540-0-0x0000000000400000-0x0000000000788000-memory.dmp	upx
behavioral1/files/0x000800000001939b-27.dat	upx
behavioral1/memory/2540-47-0x0000000000400000-0x0000000000788000-memory.dmp	upx
behavioral1/memory/2788-52-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-55-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2736-56-0x0000000000400000-0x0000000000788000-memory.dmp	upx
behavioral1/memory/2788-57-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-59-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-63-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-62-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-61-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-60-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-58-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-64-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-65-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-66-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-67-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-68-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-69-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-70-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-71-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-72-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-73-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-74-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-75-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-76-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-77-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-78-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2788-79-0x0000000000400000-0x00000000004B6000-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 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

Processes:

winkey.exe907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.execmd.exereg.exewinkey.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winkey.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winkey.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

Processes:

winkey.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winkey.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winkey.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winkey.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winkey.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

Processes:

winkey.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winkey.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

Processes:

winkey.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2788	winkey.exe
Token: SeSecurityPrivilege	2788	winkey.exe
Token: SeTakeOwnershipPrivilege	2788	winkey.exe
Token: SeLoadDriverPrivilege	2788	winkey.exe
Token: SeSystemProfilePrivilege	2788	winkey.exe
Token: SeSystemtimePrivilege	2788	winkey.exe
Token: SeProfSingleProcessPrivilege	2788	winkey.exe
Token: SeIncBasePriorityPrivilege	2788	winkey.exe
Token: SeCreatePagefilePrivilege	2788	winkey.exe
Token: SeBackupPrivilege	2788	winkey.exe
Token: SeRestorePrivilege	2788	winkey.exe
Token: SeShutdownPrivilege	2788	winkey.exe
Token: SeDebugPrivilege	2788	winkey.exe
Token: SeSystemEnvironmentPrivilege	2788	winkey.exe
Token: SeChangeNotifyPrivilege	2788	winkey.exe
Token: SeRemoteShutdownPrivilege	2788	winkey.exe
Token: SeUndockPrivilege	2788	winkey.exe
Token: SeManageVolumePrivilege	2788	winkey.exe
Token: SeImpersonatePrivilege	2788	winkey.exe
Token: SeCreateGlobalPrivilege	2788	winkey.exe
Token: 33	2788	winkey.exe
Token: 34	2788	winkey.exe
Token: 35	2788	winkey.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exewinkey.exewinkey.exe

pid	Process
2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe
2736	winkey.exe
2788	winkey.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.execmd.exewinkey.exe

description	pid	Process	procid_target
PID 2540 wrote to memory of 2712	2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe	29
PID 2540 wrote to memory of 2712	2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe	29
PID 2540 wrote to memory of 2712	2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe	29
PID 2540 wrote to memory of 2712	2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe	29
PID 2712 wrote to memory of 2880	2712	cmd.exe	31
PID 2712 wrote to memory of 2880	2712	cmd.exe	31
PID 2712 wrote to memory of 2880	2712	cmd.exe	31
PID 2712 wrote to memory of 2880	2712	cmd.exe	31
PID 2540 wrote to memory of 2736	2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe	32
PID 2540 wrote to memory of 2736	2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe	32
PID 2540 wrote to memory of 2736	2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe	32
PID 2540 wrote to memory of 2736	2540	907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe	32
PID 2736 wrote to memory of 2788	2736	winkey.exe	33
PID 2736 wrote to memory of 2788	2736	winkey.exe	33
PID 2736 wrote to memory of 2788	2736	winkey.exe	33
PID 2736 wrote to memory of 2788	2736	winkey.exe	33
PID 2736 wrote to memory of 2788	2736	winkey.exe	33
PID 2736 wrote to memory of 2788	2736	winkey.exe	33
PID 2736 wrote to memory of 2788	2736	winkey.exe	33
PID 2736 wrote to memory of 2788	2736	winkey.exe	33
PID 2736 wrote to memory of 2788	2736	winkey.exe	33

C:\Users\Admin\AppData\Local\Temp\907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\907691fa850d5ed367c2c27fb5039e6c_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\IXSRM.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2712
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "winkey" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\winkey.exe" /f
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:2880
- C:\Users\Admin\AppData\Roaming\winkey.exe
  "C:\Users\Admin\AppData\Roaming\winkey.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Users\Admin\AppData\Roaming\winkey.exe
    C:\Users\Admin\AppData\Roaming\winkey.exe
    3⤵
    - Modifies firewall policy service
    - Modifies security service
    - Windows security bypass
    - 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 use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2788

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

Create or Modify System Process

T1543

Windows Service

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

Defense Evasion

Impair Defenses

3

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery