darkcomet | 22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	GWUAP.EXE

Modifies firewall policy service 2 TTPs 3 IoCs

Modify Registry

Modify Existing Service

T1031

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	msdcsc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	msdcsc.exe

Disables RegEdit via registry modification 1 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsc.exe

Executes dropped EXE 2 IoCs

pid	Process
1404	GWUAP.EXE
728	msdcsc.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

Hidden Files and Directories

pid	Process
1556	attrib.exe
1788	attrib.exe

Loads dropped DLL 4 IoCs

pid	Process
1444	22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736.exe
1444	22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736.exe
1404	GWUAP.EXE
1404	GWUAP.EXE

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	GWUAP.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	msdcsc.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	GWUAP.EXE
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	GWUAP.EXE
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	GWUAP.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1404	GWUAP.EXE
Token: SeSecurityPrivilege	1404	GWUAP.EXE
Token: SeTakeOwnershipPrivilege	1404	GWUAP.EXE
Token: SeLoadDriverPrivilege	1404	GWUAP.EXE
Token: SeSystemProfilePrivilege	1404	GWUAP.EXE
Token: SeSystemtimePrivilege	1404	GWUAP.EXE
Token: SeProfSingleProcessPrivilege	1404	GWUAP.EXE
Token: SeIncBasePriorityPrivilege	1404	GWUAP.EXE
Token: SeCreatePagefilePrivilege	1404	GWUAP.EXE
Token: SeBackupPrivilege	1404	GWUAP.EXE
Token: SeRestorePrivilege	1404	GWUAP.EXE
Token: SeShutdownPrivilege	1404	GWUAP.EXE
Token: SeDebugPrivilege	1404	GWUAP.EXE
Token: SeSystemEnvironmentPrivilege	1404	GWUAP.EXE
Token: SeChangeNotifyPrivilege	1404	GWUAP.EXE
Token: SeRemoteShutdownPrivilege	1404	GWUAP.EXE
Token: SeUndockPrivilege	1404	GWUAP.EXE
Token: SeManageVolumePrivilege	1404	GWUAP.EXE
Token: SeImpersonatePrivilege	1404	GWUAP.EXE
Token: SeCreateGlobalPrivilege	1404	GWUAP.EXE
Token: 33	1404	GWUAP.EXE
Token: 34	1404	GWUAP.EXE
Token: 35	1404	GWUAP.EXE
Token: SeIncreaseQuotaPrivilege	728	msdcsc.exe
Token: SeSecurityPrivilege	728	msdcsc.exe
Token: SeTakeOwnershipPrivilege	728	msdcsc.exe
Token: SeLoadDriverPrivilege	728	msdcsc.exe
Token: SeSystemProfilePrivilege	728	msdcsc.exe
Token: SeSystemtimePrivilege	728	msdcsc.exe
Token: SeProfSingleProcessPrivilege	728	msdcsc.exe
Token: SeIncBasePriorityPrivilege	728	msdcsc.exe
Token: SeCreatePagefilePrivilege	728	msdcsc.exe
Token: SeBackupPrivilege	728	msdcsc.exe
Token: SeRestorePrivilege	728	msdcsc.exe
Token: SeShutdownPrivilege	728	msdcsc.exe
Token: SeDebugPrivilege	728	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	728	msdcsc.exe
Token: SeChangeNotifyPrivilege	728	msdcsc.exe
Token: SeRemoteShutdownPrivilege	728	msdcsc.exe
Token: SeUndockPrivilege	728	msdcsc.exe
Token: SeManageVolumePrivilege	728	msdcsc.exe
Token: SeImpersonatePrivilege	728	msdcsc.exe
Token: SeCreateGlobalPrivilege	728	msdcsc.exe
Token: 33	728	msdcsc.exe
Token: 34	728	msdcsc.exe
Token: 35	728	msdcsc.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1292	DllHost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
728	msdcsc.exe

Suspicious use of WriteProcessMemory 47 IoCs

description	pid	Process	procid_target
PID 1444 wrote to memory of 1404	1444	22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736.exe	27
PID 1444 wrote to memory of 1404	1444	22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736.exe	27
PID 1444 wrote to memory of 1404	1444	22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736.exe	27
PID 1444 wrote to memory of 1404	1444	22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736.exe	27
PID 1404 wrote to memory of 892	1404	GWUAP.EXE	29
PID 1404 wrote to memory of 892	1404	GWUAP.EXE	29
PID 1404 wrote to memory of 892	1404	GWUAP.EXE	29
PID 1404 wrote to memory of 892	1404	GWUAP.EXE	29
PID 1404 wrote to memory of 820	1404	GWUAP.EXE	30
PID 1404 wrote to memory of 820	1404	GWUAP.EXE	30
PID 1404 wrote to memory of 820	1404	GWUAP.EXE	30
PID 1404 wrote to memory of 820	1404	GWUAP.EXE	30
PID 892 wrote to memory of 1556	892	cmd.exe	33
PID 892 wrote to memory of 1556	892	cmd.exe	33
PID 892 wrote to memory of 1556	892	cmd.exe	33
PID 892 wrote to memory of 1556	892	cmd.exe	33
PID 820 wrote to memory of 1788	820	cmd.exe	34
PID 820 wrote to memory of 1788	820	cmd.exe	34
PID 820 wrote to memory of 1788	820	cmd.exe	34
PID 820 wrote to memory of 1788	820	cmd.exe	34
PID 1404 wrote to memory of 728	1404	GWUAP.EXE	35
PID 1404 wrote to memory of 728	1404	GWUAP.EXE	35
PID 1404 wrote to memory of 728	1404	GWUAP.EXE	35
PID 1404 wrote to memory of 728	1404	GWUAP.EXE	35
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36
PID 728 wrote to memory of 2036	728	msdcsc.exe	36

Views/modifies file attributes 1 TTPs 2 IoCs

Hidden Files and Directories

pid	Process
1556	attrib.exe
1788	attrib.exe

C:\Users\Admin\AppData\Local\Temp\22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736.exe
"C:\Users\Admin\AppData\Local\Temp\22aa1e3289e416f53ab651dc468236516d3f005d3066a04f8c47fa9cd2511736.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1444
- C:\Users\Admin\AppData\Local\Temp\GWUAP.EXE
  "C:\Users\Admin\AppData\Local\Temp\GWUAP.EXE"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1404
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\GWUAP.EXE" +s +h
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:892
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp\GWUAP.EXE" +s +h
      4⤵
      Sets file to hidden
      Views/modifies file attributes
      PID:1556
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:820
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      4⤵
      Sets file to hidden
      Views/modifies file attributes
      PID:1788
- - C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
    "C:\Windows\system32\MSDCSC\msdcsc.exe"
    3⤵
    - Modifies firewall policy service
    - Disables RegEdit via registry modification
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:728
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      PID:2036

C:\Windows\SysWOW64\DllHost.exe
C:\Windows\SysWOW64\DllHost.exe /Processid:{76D0CB12-7604-4048-B83C-1005C7DDC503}
1⤵
- Suspicious use of FindShellTrayWindow
PID:1292

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry