darkcomet | 33b87e2b46562bfffedc7d6652f4c1574eb877ec8828900133856da2126817a6

Processes:

27b96be403685a34c41056fdbb6c6e09.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"	27b96be403685a34c41056fdbb6c6e09.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

Windows Service

T1543.003

Processes:

msdcsc.exe

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

Modifies security service 2 TTPs 1 IoCs
evasion

Modify Registry
T1112

Windows Service
T1543.003

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

Disable or Modify Tools

T1562.001

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-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsc.exe

Disables Task Manager via registry modification
evasion
Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

2388 msdcsc.exe
Loads dropped DLL 2 IoCs

Processes:

27b96be403685a34c41056fdbb6c6e09.exe

pid process

3036 27b96be403685a34c41056fdbb6c6e09.exe
3036 27b96be403685a34c41056fdbb6c6e09.exe

pid	process
2388	msdcsc.exe

pid	process
3036	27b96be403685a34c41056fdbb6c6e09.exe
3036	27b96be403685a34c41056fdbb6c6e09.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

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

T1547.001

Modify Registry

Processes:

27b96be403685a34c41056fdbb6c6e09.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	27b96be403685a34c41056fdbb6c6e09.exe

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

System Information Discovery
T1082
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

msdcsc.exe

pid process

2388 msdcsc.exe

pid	process
2388	msdcsc.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

Processes:

27b96be403685a34c41056fdbb6c6e09.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeSecurityPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeTakeOwnershipPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeLoadDriverPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeSystemProfilePrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeSystemtimePrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeProfSingleProcessPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeIncBasePriorityPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeCreatePagefilePrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeBackupPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeRestorePrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeShutdownPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeDebugPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeSystemEnvironmentPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeChangeNotifyPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeRemoteShutdownPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeUndockPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeManageVolumePrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeImpersonatePrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeCreateGlobalPrivilege	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: 33	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: 34	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: 35	3036	27b96be403685a34c41056fdbb6c6e09.exe
Token: SeIncreaseQuotaPrivilege	2388	msdcsc.exe
Token: SeSecurityPrivilege	2388	msdcsc.exe
Token: SeTakeOwnershipPrivilege	2388	msdcsc.exe
Token: SeLoadDriverPrivilege	2388	msdcsc.exe
Token: SeSystemProfilePrivilege	2388	msdcsc.exe
Token: SeSystemtimePrivilege	2388	msdcsc.exe
Token: SeProfSingleProcessPrivilege	2388	msdcsc.exe
Token: SeIncBasePriorityPrivilege	2388	msdcsc.exe
Token: SeCreatePagefilePrivilege	2388	msdcsc.exe
Token: SeBackupPrivilege	2388	msdcsc.exe
Token: SeRestorePrivilege	2388	msdcsc.exe
Token: SeShutdownPrivilege	2388	msdcsc.exe
Token: SeDebugPrivilege	2388	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	2388	msdcsc.exe
Token: SeChangeNotifyPrivilege	2388	msdcsc.exe
Token: SeRemoteShutdownPrivilege	2388	msdcsc.exe
Token: SeUndockPrivilege	2388	msdcsc.exe
Token: SeManageVolumePrivilege	2388	msdcsc.exe
Token: SeImpersonatePrivilege	2388	msdcsc.exe
Token: SeCreateGlobalPrivilege	2388	msdcsc.exe
Token: 33	2388	msdcsc.exe
Token: 34	2388	msdcsc.exe
Token: 35	2388	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

2388 msdcsc.exe

pid	process
2388	msdcsc.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

27b96be403685a34c41056fdbb6c6e09.exemsdcsc.exe

description	pid	process	target process
PID 3036 wrote to memory of 2388	3036	27b96be403685a34c41056fdbb6c6e09.exe	msdcsc.exe
PID 3036 wrote to memory of 2388	3036	27b96be403685a34c41056fdbb6c6e09.exe	msdcsc.exe
PID 3036 wrote to memory of 2388	3036	27b96be403685a34c41056fdbb6c6e09.exe	msdcsc.exe
PID 3036 wrote to memory of 2388	3036	27b96be403685a34c41056fdbb6c6e09.exe	msdcsc.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	msdcsc.exe	notepad.exe
PID 2388 wrote to memory of 2836	2388	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

C:\Users\Admin\AppData\Local\Temp\27b96be403685a34c41056fdbb6c6e09.exe
"C:\Users\Admin\AppData\Local\Temp\27b96be403685a34c41056fdbb6c6e09.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3036

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
2⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Disables RegEdit via registry modification
- 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:2388

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:2836

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

7

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Credential Access

Discovery

System Information Discovery