darkcomet | b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408

Processes:

b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe

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"	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe

Modifies security service 2 TTPs 1 IoCs
evasion

Modify Registry
T1112

Modify Existing Service
T1031

Processes:

msdcsc.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" msdcsc.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	msdcsc.exe

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

Processes:

msdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msdcsc.exe

Executes dropped EXE 3 IoCs

Processes:

CG_LOADER.EXEmsdcsc.exeCG_LOADER.EXE

pid process

1952 CG_LOADER.EXE
4968 msdcsc.exe
4740 CG_LOADER.EXE
Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

3464 attrib.exe

pid	process
1952	CG_LOADER.EXE
4968	msdcsc.exe
4740	CG_LOADER.EXE

pid	process
3464	attrib.exe

VMProtect packed file 4 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\CG_LOADER.EXE	vmprotect
C:\Users\Admin\AppData\Local\Temp\CG_LOADER.EXE	vmprotect
behavioral2/memory/1952-140-0x00000000009D0000-0x000000000255C000-memory.dmp	vmprotect
C:\Users\Admin\AppData\Local\Temp\CG_LOADER.EXE	vmprotect

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exemsdcsc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	msdcsc.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

Processes:

msdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	msdcsc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exemsdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	msdcsc.exe

Drops file in System32 directory 3 IoCs

Processes:

b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe

description	ioc	process
File created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

CG_LOADER.EXECG_LOADER.EXE

pid process

1952 CG_LOADER.EXE
4740 CG_LOADER.EXE

pid	process
1952	CG_LOADER.EXE
4740	CG_LOADER.EXE

Suspicious use of AdjustPrivilegeToken 50 IoCs

Processes:

b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exemsdcsc.exeCG_LOADER.EXECG_LOADER.EXE

description	pid	process
Token: SeIncreaseQuotaPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeSecurityPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeTakeOwnershipPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeLoadDriverPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeSystemProfilePrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeSystemtimePrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeProfSingleProcessPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeIncBasePriorityPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeCreatePagefilePrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeBackupPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeRestorePrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeShutdownPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeDebugPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeSystemEnvironmentPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeChangeNotifyPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeRemoteShutdownPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeUndockPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeManageVolumePrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeImpersonatePrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeCreateGlobalPrivilege	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: 33	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: 34	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: 35	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: 36	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
Token: SeIncreaseQuotaPrivilege	4968	msdcsc.exe
Token: SeSecurityPrivilege	4968	msdcsc.exe
Token: SeTakeOwnershipPrivilege	4968	msdcsc.exe
Token: SeLoadDriverPrivilege	4968	msdcsc.exe
Token: SeSystemProfilePrivilege	4968	msdcsc.exe
Token: SeSystemtimePrivilege	4968	msdcsc.exe
Token: SeProfSingleProcessPrivilege	4968	msdcsc.exe
Token: SeIncBasePriorityPrivilege	4968	msdcsc.exe
Token: SeCreatePagefilePrivilege	4968	msdcsc.exe
Token: SeBackupPrivilege	4968	msdcsc.exe
Token: SeRestorePrivilege	4968	msdcsc.exe
Token: SeShutdownPrivilege	4968	msdcsc.exe
Token: SeDebugPrivilege	4968	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	4968	msdcsc.exe
Token: SeChangeNotifyPrivilege	4968	msdcsc.exe
Token: SeRemoteShutdownPrivilege	4968	msdcsc.exe
Token: SeUndockPrivilege	4968	msdcsc.exe
Token: SeManageVolumePrivilege	4968	msdcsc.exe
Token: SeImpersonatePrivilege	4968	msdcsc.exe
Token: SeCreateGlobalPrivilege	4968	msdcsc.exe
Token: 33	4968	msdcsc.exe
Token: 34	4968	msdcsc.exe
Token: 35	4968	msdcsc.exe
Token: 36	4968	msdcsc.exe
Token: SeDebugPrivilege	1952	CG_LOADER.EXE
Token: SeDebugPrivilege	4740	CG_LOADER.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

4968 msdcsc.exe

pid	process
4968	msdcsc.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.execmd.exemsdcsc.exe

description	pid	process	target process
PID 4408 wrote to memory of 4524	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	cmd.exe
PID 4408 wrote to memory of 4524	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	cmd.exe
PID 4408 wrote to memory of 4524	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	cmd.exe
PID 4524 wrote to memory of 3464	4524	cmd.exe	attrib.exe
PID 4524 wrote to memory of 3464	4524	cmd.exe	attrib.exe
PID 4524 wrote to memory of 3464	4524	cmd.exe	attrib.exe
PID 4408 wrote to memory of 1952	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	CG_LOADER.EXE
PID 4408 wrote to memory of 1952	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	CG_LOADER.EXE
PID 4408 wrote to memory of 1952	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	CG_LOADER.EXE
PID 4408 wrote to memory of 4968	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	msdcsc.exe
PID 4408 wrote to memory of 4968	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	msdcsc.exe
PID 4408 wrote to memory of 4968	4408	b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe	msdcsc.exe
PID 4968 wrote to memory of 4740	4968	msdcsc.exe	CG_LOADER.EXE
PID 4968 wrote to memory of 4740	4968	msdcsc.exe	CG_LOADER.EXE
PID 4968 wrote to memory of 4740	4968	msdcsc.exe	CG_LOADER.EXE
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe
PID 4968 wrote to memory of 3776	4968	msdcsc.exe	notepad.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

Processes:

msdcsc.exe

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

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

3464 attrib.exe

pid	process
3464	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe
"C:\Users\Admin\AppData\Local\Temp\b6e8f0a74f60902d4704b8ffc1809eef7d8a6b84b3115567d279ce05d2b94408.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4408

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:4524

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:3464

C:\Users\Admin\AppData\Local\Temp\CG_LOADER.EXE
"C:\Users\Admin\AppData\Local\Temp\CG_LOADER.EXE"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1952

C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
"C:\Windows\system32\MSDCSC\msdcsc.exe"
2⤵
- Modifies security service
- Windows security bypass
- Executes dropped EXE
- Checks computer location settings
- Windows security modification
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:4968

C:\Users\Admin\AppData\Local\Temp\CG_LOADER.EXE
"C:\Users\Admin\AppData\Local\Temp\CG_LOADER.EXE"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4740

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:3776

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Modify Existing Service

T1031

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

6

Disabling Security Tools

T1089

Hidden Files and Directories

T1158

Credential Access

Discovery

Query Registry

T1012

System Information Discovery