darkcomet | 731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c

Processes:

731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.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"	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.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

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

msdcsc.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsc.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

1676 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

4176 attrib.exe
4828 attrib.exe

pid	process
1676	msdcsc.exe

pid	process
4176	attrib.exe
4828	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:

731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.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\UpdatesDisableNotify = "1"	msdcsc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	msdcsc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exemsdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	msdcsc.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:

731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeSecurityPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeTakeOwnershipPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeLoadDriverPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeSystemProfilePrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeSystemtimePrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeProfSingleProcessPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeIncBasePriorityPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeCreatePagefilePrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeBackupPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeRestorePrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeShutdownPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeDebugPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeSystemEnvironmentPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeChangeNotifyPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeRemoteShutdownPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeUndockPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeManageVolumePrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeImpersonatePrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeCreateGlobalPrivilege	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: 33	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: 34	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: 35	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: 36	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
Token: SeIncreaseQuotaPrivilege	1676	msdcsc.exe
Token: SeSecurityPrivilege	1676	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1676	msdcsc.exe
Token: SeLoadDriverPrivilege	1676	msdcsc.exe
Token: SeSystemProfilePrivilege	1676	msdcsc.exe
Token: SeSystemtimePrivilege	1676	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1676	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1676	msdcsc.exe
Token: SeCreatePagefilePrivilege	1676	msdcsc.exe
Token: SeBackupPrivilege	1676	msdcsc.exe
Token: SeRestorePrivilege	1676	msdcsc.exe
Token: SeShutdownPrivilege	1676	msdcsc.exe
Token: SeDebugPrivilege	1676	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1676	msdcsc.exe
Token: SeChangeNotifyPrivilege	1676	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1676	msdcsc.exe
Token: SeUndockPrivilege	1676	msdcsc.exe
Token: SeManageVolumePrivilege	1676	msdcsc.exe
Token: SeImpersonatePrivilege	1676	msdcsc.exe
Token: SeCreateGlobalPrivilege	1676	msdcsc.exe
Token: 33	1676	msdcsc.exe
Token: 34	1676	msdcsc.exe
Token: 35	1676	msdcsc.exe
Token: 36	1676	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

1676 msdcsc.exe

pid	process
1676	msdcsc.exe

Suspicious use of WriteProcessMemory 54 IoCs

Processes:

731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 424 wrote to memory of 2424	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	cmd.exe
PID 424 wrote to memory of 2424	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	cmd.exe
PID 424 wrote to memory of 2424	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	cmd.exe
PID 424 wrote to memory of 60	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	cmd.exe
PID 424 wrote to memory of 60	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	cmd.exe
PID 424 wrote to memory of 60	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	cmd.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 424 wrote to memory of 440	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	notepad.exe
PID 2424 wrote to memory of 4828	2424	cmd.exe	attrib.exe
PID 2424 wrote to memory of 4828	2424	cmd.exe	attrib.exe
PID 2424 wrote to memory of 4828	2424	cmd.exe	attrib.exe
PID 60 wrote to memory of 4176	60	cmd.exe	attrib.exe
PID 60 wrote to memory of 4176	60	cmd.exe	attrib.exe
PID 60 wrote to memory of 4176	60	cmd.exe	attrib.exe
PID 424 wrote to memory of 1676	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	msdcsc.exe
PID 424 wrote to memory of 1676	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	msdcsc.exe
PID 424 wrote to memory of 1676	424	731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe	msdcsc.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	msdcsc.exe	notepad.exe
PID 1676 wrote to memory of 2440	1676	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

4176 attrib.exe
4828 attrib.exe

pid	process
4176	attrib.exe
4828	attrib.exe

C:\Users\Admin\AppData\Local\Temp\731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe
"C:\Users\Admin\AppData\Local\Temp\731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.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:424

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe" +s +h
2⤵
- Suspicious use of WriteProcessMemory
PID:2424

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\731bf93dd8c38122503a1d07c57060bfbbeb0456f6148762dabd8481982f6a2c.exe" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:4828

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:60

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
3⤵
- Sets file to hidden
- Views/modifies file attributes
PID:4176

C:\Windows\SysWOW64\notepad.exe
notepad
2⤵
PID:440

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
2⤵
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- Executes dropped EXE
- 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:1676

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:2440

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