darkcomet | 601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1

Processes:

601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.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"	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.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 2 IoCs

Processes:

msdcsc.exemsdcsc.exe

pid process

1136 msdcsc.exe
3012 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

2076 attrib.exe
1404 attrib.exe

pid	process
1136	msdcsc.exe
3012	msdcsc.exe

pid	process
2076	attrib.exe
1404	attrib.exe

UPX packed file 11 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4056-136-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/4056-137-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/4056-135-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/4056-139-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/4056-141-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/4056-142-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/4056-143-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/4056-144-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/4056-163-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/3012-164-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/3012-165-0x0000000000400000-0x00000000004E8000-memory.dmp	upx

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:

601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.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:

601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exemsdcsc.exe

description	pid	process	target process
PID 3500 set thread context of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 1136 set thread context of 3012	1136	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
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

3012 msdcsc.exe

pid	process
3012	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeSecurityPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeTakeOwnershipPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeLoadDriverPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeSystemProfilePrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeSystemtimePrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeProfSingleProcessPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeIncBasePriorityPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeCreatePagefilePrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeBackupPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeRestorePrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeShutdownPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeDebugPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeSystemEnvironmentPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeChangeNotifyPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeRemoteShutdownPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeUndockPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeManageVolumePrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeImpersonatePrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeCreateGlobalPrivilege	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: 33	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: 34	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: 35	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: 36	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
Token: SeIncreaseQuotaPrivilege	3012	msdcsc.exe
Token: SeSecurityPrivilege	3012	msdcsc.exe
Token: SeTakeOwnershipPrivilege	3012	msdcsc.exe
Token: SeLoadDriverPrivilege	3012	msdcsc.exe
Token: SeSystemProfilePrivilege	3012	msdcsc.exe
Token: SeSystemtimePrivilege	3012	msdcsc.exe
Token: SeProfSingleProcessPrivilege	3012	msdcsc.exe
Token: SeIncBasePriorityPrivilege	3012	msdcsc.exe
Token: SeCreatePagefilePrivilege	3012	msdcsc.exe
Token: SeBackupPrivilege	3012	msdcsc.exe
Token: SeRestorePrivilege	3012	msdcsc.exe
Token: SeShutdownPrivilege	3012	msdcsc.exe
Token: SeDebugPrivilege	3012	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	3012	msdcsc.exe
Token: SeChangeNotifyPrivilege	3012	msdcsc.exe
Token: SeRemoteShutdownPrivilege	3012	msdcsc.exe
Token: SeUndockPrivilege	3012	msdcsc.exe
Token: SeManageVolumePrivilege	3012	msdcsc.exe
Token: SeImpersonatePrivilege	3012	msdcsc.exe
Token: SeCreateGlobalPrivilege	3012	msdcsc.exe
Token: 33	3012	msdcsc.exe
Token: 34	3012	msdcsc.exe
Token: 35	3012	msdcsc.exe
Token: 36	3012	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

3012 msdcsc.exe

pid	process
3012	msdcsc.exe

Suspicious use of WriteProcessMemory 31 IoCs

Processes:

601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 3500 wrote to memory of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 3500 wrote to memory of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 3500 wrote to memory of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 3500 wrote to memory of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 3500 wrote to memory of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 3500 wrote to memory of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 3500 wrote to memory of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 3500 wrote to memory of 4056	3500	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
PID 4056 wrote to memory of 4808	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	cmd.exe
PID 4056 wrote to memory of 4808	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	cmd.exe
PID 4056 wrote to memory of 4808	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	cmd.exe
PID 4056 wrote to memory of 4824	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	cmd.exe
PID 4056 wrote to memory of 4824	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	cmd.exe
PID 4056 wrote to memory of 4824	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	cmd.exe
PID 4056 wrote to memory of 1136	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	msdcsc.exe
PID 4056 wrote to memory of 1136	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	msdcsc.exe
PID 4056 wrote to memory of 1136	4056	601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe	msdcsc.exe
PID 4808 wrote to memory of 1404	4808	cmd.exe	attrib.exe
PID 4808 wrote to memory of 1404	4808	cmd.exe	attrib.exe
PID 4808 wrote to memory of 1404	4808	cmd.exe	attrib.exe
PID 4824 wrote to memory of 2076	4824	cmd.exe	attrib.exe
PID 4824 wrote to memory of 2076	4824	cmd.exe	attrib.exe
PID 4824 wrote to memory of 2076	4824	cmd.exe	attrib.exe
PID 1136 wrote to memory of 3012	1136	msdcsc.exe	msdcsc.exe
PID 1136 wrote to memory of 3012	1136	msdcsc.exe	msdcsc.exe
PID 1136 wrote to memory of 3012	1136	msdcsc.exe	msdcsc.exe
PID 1136 wrote to memory of 3012	1136	msdcsc.exe	msdcsc.exe
PID 1136 wrote to memory of 3012	1136	msdcsc.exe	msdcsc.exe
PID 1136 wrote to memory of 3012	1136	msdcsc.exe	msdcsc.exe
PID 1136 wrote to memory of 3012	1136	msdcsc.exe	msdcsc.exe
PID 1136 wrote to memory of 3012	1136	msdcsc.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

2076 attrib.exe
1404 attrib.exe

pid	process
2076	attrib.exe
1404	attrib.exe

C:\Users\Admin\AppData\Local\Temp\601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
"C:\Users\Admin\AppData\Local\Temp\601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3500

C:\Users\Admin\AppData\Local\Temp\601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
C:\Users\Admin\AppData\Local\Temp\601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe
2⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4056

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:4808

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp\601ad03ceea7d536b33d7f8415e01a26f4046e2c9fd0c3c510beb55463f78fc1.exe" +s +h
4⤵
- Sets file to hidden
- Views/modifies file attributes
PID:1404

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:4824

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
4⤵
- Sets file to hidden
- Views/modifies file attributes
PID:2076

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1136

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
4⤵
- Modifies security service
- Windows security bypass
- Executes dropped EXE
- Windows security modification
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3012

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

5

Disabling Security Tools

T1089

Hidden Files and Directories

T1158

Credential Access

Discovery

Query Registry

T1012

System Information Discovery