darkcomet | 6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7

Processes:

6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.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\UpdatesDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msdcsc.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

1572 msdcsc.exe
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

5008 attrib.exe
5084 attrib.exe

pid	process
1572	msdcsc.exe

pid	process
5008	attrib.exe
5084	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3463845317-933582289-45817732-1000\Control Panel\International\Geo\Nation	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.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 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3463845317-933582289-45817732-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

Processes:

6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

1572 msdcsc.exe

pid	process
1572	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeSecurityPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeTakeOwnershipPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeLoadDriverPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeSystemProfilePrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeSystemtimePrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeProfSingleProcessPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeIncBasePriorityPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeCreatePagefilePrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeBackupPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeRestorePrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeShutdownPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeDebugPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeSystemEnvironmentPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeChangeNotifyPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeRemoteShutdownPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeUndockPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeManageVolumePrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeImpersonatePrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeCreateGlobalPrivilege	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: 33	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: 34	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: 35	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: 36	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
Token: SeIncreaseQuotaPrivilege	1572	msdcsc.exe
Token: SeSecurityPrivilege	1572	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1572	msdcsc.exe
Token: SeLoadDriverPrivilege	1572	msdcsc.exe
Token: SeSystemProfilePrivilege	1572	msdcsc.exe
Token: SeSystemtimePrivilege	1572	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1572	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1572	msdcsc.exe
Token: SeCreatePagefilePrivilege	1572	msdcsc.exe
Token: SeBackupPrivilege	1572	msdcsc.exe
Token: SeRestorePrivilege	1572	msdcsc.exe
Token: SeShutdownPrivilege	1572	msdcsc.exe
Token: SeDebugPrivilege	1572	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1572	msdcsc.exe
Token: SeChangeNotifyPrivilege	1572	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1572	msdcsc.exe
Token: SeUndockPrivilege	1572	msdcsc.exe
Token: SeManageVolumePrivilege	1572	msdcsc.exe
Token: SeImpersonatePrivilege	1572	msdcsc.exe
Token: SeCreateGlobalPrivilege	1572	msdcsc.exe
Token: 33	1572	msdcsc.exe
Token: 34	1572	msdcsc.exe
Token: 35	1572	msdcsc.exe
Token: 36	1572	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

1572 msdcsc.exe

pid	process
1572	msdcsc.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 4972 wrote to memory of 872	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	cmd.exe
PID 4972 wrote to memory of 872	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	cmd.exe
PID 4972 wrote to memory of 872	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	cmd.exe
PID 4972 wrote to memory of 1528	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	cmd.exe
PID 4972 wrote to memory of 1528	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	cmd.exe
PID 4972 wrote to memory of 1528	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	cmd.exe
PID 1528 wrote to memory of 5008	1528	cmd.exe	attrib.exe
PID 1528 wrote to memory of 5008	1528	cmd.exe	attrib.exe
PID 1528 wrote to memory of 5008	1528	cmd.exe	attrib.exe
PID 872 wrote to memory of 5084	872	cmd.exe	attrib.exe
PID 872 wrote to memory of 5084	872	cmd.exe	attrib.exe
PID 872 wrote to memory of 5084	872	cmd.exe	attrib.exe
PID 4972 wrote to memory of 1572	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	msdcsc.exe
PID 4972 wrote to memory of 1572	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	msdcsc.exe
PID 4972 wrote to memory of 1572	4972	6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe	msdcsc.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	msdcsc.exe	notepad.exe
PID 1572 wrote to memory of 428	1572	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 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

5008 attrib.exe
5084 attrib.exe

pid	process
5008	attrib.exe
5084	attrib.exe

C:\Users\Admin\AppData\Local\Temp\6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe
"C:\Users\Admin\AppData\Local\Temp\6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4972

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:872

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\6c42d09cb956bcc92031f99ab79065c318985fa063ae5eacc07ddbbbe34652f7.exe" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:5084

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:1528

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:5008

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
2⤵
- Modifies security service
- Windows security bypass
- Executes dropped EXE
- Windows security modification
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1572

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:428

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