darkcomet | 23b4f8c7077f5f9f6fbf62307543c12ba1fec9fdf5fa9e1d001c778e5ea4bc61

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsjc.exe"	ss.scr

Modifies firewall policy service 3 TTPs 3 IoCs

Modify Registry

Windows Service

Disable or Modify System Firewall

T1562.004

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	msdcsjc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	msdcsjc.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	msdcsjc.exe

Modifies security service 2 TTPs 1 IoCs

Modify Registry

Windows Service

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

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

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

Disables RegEdit via registry modification 1 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	msdcsjc.exe

Disables Task Manager via registry modification
evasion

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

Hidden Files and Directories

T1564.001

pid	Process
3324	attrib.exe
644	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	ss.scr

Deletes itself 1 IoCs

pid	Process
828	notepad.exe

Executes dropped EXE 1 IoCs

pid	Process
3244	msdcsjc.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\reahltekaudio = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsjc.exe"	msdcsjc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\reahltekaudio = "C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\MSDCSC\\msdcsjc.exe"	ss.scr

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsjc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ss.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	ss.scr

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3244	msdcsjc.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1180	ss.scr
Token: SeSecurityPrivilege	1180	ss.scr
Token: SeTakeOwnershipPrivilege	1180	ss.scr
Token: SeLoadDriverPrivilege	1180	ss.scr
Token: SeSystemProfilePrivilege	1180	ss.scr
Token: SeSystemtimePrivilege	1180	ss.scr
Token: SeProfSingleProcessPrivilege	1180	ss.scr
Token: SeIncBasePriorityPrivilege	1180	ss.scr
Token: SeCreatePagefilePrivilege	1180	ss.scr
Token: SeBackupPrivilege	1180	ss.scr
Token: SeRestorePrivilege	1180	ss.scr
Token: SeShutdownPrivilege	1180	ss.scr
Token: SeDebugPrivilege	1180	ss.scr
Token: SeSystemEnvironmentPrivilege	1180	ss.scr
Token: SeChangeNotifyPrivilege	1180	ss.scr
Token: SeRemoteShutdownPrivilege	1180	ss.scr
Token: SeUndockPrivilege	1180	ss.scr
Token: SeManageVolumePrivilege	1180	ss.scr
Token: SeImpersonatePrivilege	1180	ss.scr
Token: SeCreateGlobalPrivilege	1180	ss.scr
Token: 33	1180	ss.scr
Token: 34	1180	ss.scr
Token: 35	1180	ss.scr
Token: 36	1180	ss.scr
Token: SeIncreaseQuotaPrivilege	3244	msdcsjc.exe
Token: SeSecurityPrivilege	3244	msdcsjc.exe
Token: SeTakeOwnershipPrivilege	3244	msdcsjc.exe
Token: SeLoadDriverPrivilege	3244	msdcsjc.exe
Token: SeSystemProfilePrivilege	3244	msdcsjc.exe
Token: SeSystemtimePrivilege	3244	msdcsjc.exe
Token: SeProfSingleProcessPrivilege	3244	msdcsjc.exe
Token: SeIncBasePriorityPrivilege	3244	msdcsjc.exe
Token: SeCreatePagefilePrivilege	3244	msdcsjc.exe
Token: SeBackupPrivilege	3244	msdcsjc.exe
Token: SeRestorePrivilege	3244	msdcsjc.exe
Token: SeShutdownPrivilege	3244	msdcsjc.exe
Token: SeDebugPrivilege	3244	msdcsjc.exe
Token: SeSystemEnvironmentPrivilege	3244	msdcsjc.exe
Token: SeChangeNotifyPrivilege	3244	msdcsjc.exe
Token: SeRemoteShutdownPrivilege	3244	msdcsjc.exe
Token: SeUndockPrivilege	3244	msdcsjc.exe
Token: SeManageVolumePrivilege	3244	msdcsjc.exe
Token: SeImpersonatePrivilege	3244	msdcsjc.exe
Token: SeCreateGlobalPrivilege	3244	msdcsjc.exe
Token: 33	3244	msdcsjc.exe
Token: 34	3244	msdcsjc.exe
Token: 35	3244	msdcsjc.exe
Token: 36	3244	msdcsjc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3244	msdcsjc.exe

Suspicious use of WriteProcessMemory 59 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 4408	1180	ss.scr	85
PID 1180 wrote to memory of 4408	1180	ss.scr	85
PID 1180 wrote to memory of 4408	1180	ss.scr	85
PID 1180 wrote to memory of 3592	1180	ss.scr	87
PID 1180 wrote to memory of 3592	1180	ss.scr	87
PID 1180 wrote to memory of 3592	1180	ss.scr	87
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 1180 wrote to memory of 828	1180	ss.scr	88
PID 4408 wrote to memory of 3324	4408	cmd.exe	90
PID 4408 wrote to memory of 3324	4408	cmd.exe	90
PID 4408 wrote to memory of 3324	4408	cmd.exe	90
PID 3592 wrote to memory of 644	3592	cmd.exe	91
PID 3592 wrote to memory of 644	3592	cmd.exe	91
PID 3592 wrote to memory of 644	3592	cmd.exe	91
PID 1180 wrote to memory of 3244	1180	ss.scr	92
PID 1180 wrote to memory of 3244	1180	ss.scr	92
PID 1180 wrote to memory of 3244	1180	ss.scr	92
PID 3244 wrote to memory of 2856	3244	msdcsjc.exe	93
PID 3244 wrote to memory of 2856	3244	msdcsjc.exe	93
PID 3244 wrote to memory of 2856	3244	msdcsjc.exe	93
PID 3244 wrote to memory of 3640	3244	msdcsjc.exe	94
PID 3244 wrote to memory of 3640	3244	msdcsjc.exe	94
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95
PID 3244 wrote to memory of 2064	3244	msdcsjc.exe	95

System policy modification 1 TTPs 3 IoCs

Modify Registry

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

Views/modifies file attributes 1 TTPs 2 IoCs

Hidden Files and Directories

T1564.001

pid	Process
3324	attrib.exe
644	attrib.exe

C:\Users\Admin\AppData\Local\Temp\ss.scr
"C:\Users\Admin\AppData\Local\Temp\ss.scr" /S
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\ss.scr" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4408
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\ss.scr" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:3324
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3592
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:644
- C:\Windows\SysWOW64\notepad.exe
  notepad
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:828
- C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MSDCSC\msdcsjc.exe
  "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\MSDCSC\msdcsjc.exe"
  2⤵
  - Modifies firewall policy service
  - Modifies security service
  - Windows security bypass
  - Disables RegEdit via registry modification
  - Executes dropped EXE
  - Windows security modification
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:3244
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    PID:2856
- - C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    3⤵
    PID:3640
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2064

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

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

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Modify Registry