darkcomet | 242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21

Processes:

systeminf2.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"	systeminf2.exe

Modifies firewall policy service 2 TTPs 6 IoCs

evasion

Modify Registry

Modify Existing Service

T1031

Processes:

iexplore.exemsdcsc.exe

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

Modifies security service 2 TTPs 2 IoCs

evasion

Modify Registry

Modify Existing Service

T1031

Processes:

iexplore.exemsdcsc.exe

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

Windows security bypass 2 TTPs 4 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

Processes:

iexplore.exemsdcsc.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	iexplore.exe
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 3 IoCs

Processes:

systeminf1.exesysteminf2.exemsdcsc.exe

pid process

3752 systeminf1.exe
1392 systeminf2.exe
1820 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

5072 attrib.exe
4320 attrib.exe

pid	process
3752	systeminf1.exe
1392	systeminf2.exe
1820	msdcsc.exe

pid	process
5072	attrib.exe
4320	attrib.exe

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

systeminf2.exe242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	systeminf2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.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 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

systeminf2.exemsdcsc.exeiexplore.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	systeminf2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	msdcsc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	iexplore.exe

Drops file in System32 directory 3 IoCs

Processes:

242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exeattrib.exe

description	ioc	process
File created	C:\Windows\SysWOW64\systeminf1.exe	242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe
File created	C:\Windows\SysWOW64\systeminf2.exe	242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe
File opened for modification	C:\Windows\SysWOW64\systeminf2.exe	attrib.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

msdcsc.exe

description pid process target process

PID 1820 set thread context of 4160 1820 msdcsc.exe iexplore.exe
Drops file in Windows directory 1 IoCs

Processes:

attrib.exe

description ioc process

File opened for modification C:\Windows\SysWOW64 attrib.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:

systeminf2.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ systeminf2.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

3552 PING.EXE

description	pid	process	target process
PID 1820 set thread context of 4160	1820	msdcsc.exe	iexplore.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64	attrib.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	systeminf2.exe

pid	process
3552	PING.EXE

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

systeminf2.exemsdcsc.exeiexplore.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1392	systeminf2.exe
Token: SeSecurityPrivilege	1392	systeminf2.exe
Token: SeTakeOwnershipPrivilege	1392	systeminf2.exe
Token: SeLoadDriverPrivilege	1392	systeminf2.exe
Token: SeSystemProfilePrivilege	1392	systeminf2.exe
Token: SeSystemtimePrivilege	1392	systeminf2.exe
Token: SeProfSingleProcessPrivilege	1392	systeminf2.exe
Token: SeIncBasePriorityPrivilege	1392	systeminf2.exe
Token: SeCreatePagefilePrivilege	1392	systeminf2.exe
Token: SeBackupPrivilege	1392	systeminf2.exe
Token: SeRestorePrivilege	1392	systeminf2.exe
Token: SeShutdownPrivilege	1392	systeminf2.exe
Token: SeDebugPrivilege	1392	systeminf2.exe
Token: SeSystemEnvironmentPrivilege	1392	systeminf2.exe
Token: SeChangeNotifyPrivilege	1392	systeminf2.exe
Token: SeRemoteShutdownPrivilege	1392	systeminf2.exe
Token: SeUndockPrivilege	1392	systeminf2.exe
Token: SeManageVolumePrivilege	1392	systeminf2.exe
Token: SeImpersonatePrivilege	1392	systeminf2.exe
Token: SeCreateGlobalPrivilege	1392	systeminf2.exe
Token: 33	1392	systeminf2.exe
Token: 34	1392	systeminf2.exe
Token: 35	1392	systeminf2.exe
Token: 36	1392	systeminf2.exe
Token: SeIncreaseQuotaPrivilege	1820	msdcsc.exe
Token: SeSecurityPrivilege	1820	msdcsc.exe
Token: SeTakeOwnershipPrivilege	1820	msdcsc.exe
Token: SeLoadDriverPrivilege	1820	msdcsc.exe
Token: SeSystemProfilePrivilege	1820	msdcsc.exe
Token: SeSystemtimePrivilege	1820	msdcsc.exe
Token: SeProfSingleProcessPrivilege	1820	msdcsc.exe
Token: SeIncBasePriorityPrivilege	1820	msdcsc.exe
Token: SeCreatePagefilePrivilege	1820	msdcsc.exe
Token: SeBackupPrivilege	1820	msdcsc.exe
Token: SeRestorePrivilege	1820	msdcsc.exe
Token: SeShutdownPrivilege	1820	msdcsc.exe
Token: SeDebugPrivilege	1820	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	1820	msdcsc.exe
Token: SeChangeNotifyPrivilege	1820	msdcsc.exe
Token: SeRemoteShutdownPrivilege	1820	msdcsc.exe
Token: SeUndockPrivilege	1820	msdcsc.exe
Token: SeManageVolumePrivilege	1820	msdcsc.exe
Token: SeImpersonatePrivilege	1820	msdcsc.exe
Token: SeCreateGlobalPrivilege	1820	msdcsc.exe
Token: 33	1820	msdcsc.exe
Token: 34	1820	msdcsc.exe
Token: 35	1820	msdcsc.exe
Token: 36	1820	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	4160	iexplore.exe
Token: SeSecurityPrivilege	4160	iexplore.exe
Token: SeTakeOwnershipPrivilege	4160	iexplore.exe
Token: SeLoadDriverPrivilege	4160	iexplore.exe
Token: SeSystemProfilePrivilege	4160	iexplore.exe
Token: SeSystemtimePrivilege	4160	iexplore.exe
Token: SeProfSingleProcessPrivilege	4160	iexplore.exe
Token: SeIncBasePriorityPrivilege	4160	iexplore.exe
Token: SeCreatePagefilePrivilege	4160	iexplore.exe
Token: SeBackupPrivilege	4160	iexplore.exe
Token: SeRestorePrivilege	4160	iexplore.exe
Token: SeShutdownPrivilege	4160	iexplore.exe
Token: SeDebugPrivilege	4160	iexplore.exe
Token: SeSystemEnvironmentPrivilege	4160	iexplore.exe
Token: SeChangeNotifyPrivilege	4160	iexplore.exe
Token: SeRemoteShutdownPrivilege	4160	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid process

4160 iexplore.exe

pid	process
4160	iexplore.exe

Suspicious use of WriteProcessMemory 31 IoCs

Processes:

242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exesysteminf2.execmd.execmd.execmd.exemsdcsc.exe

description	pid	process	target process
PID 4744 wrote to memory of 3752	4744	242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe	systeminf1.exe
PID 4744 wrote to memory of 3752	4744	242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe	systeminf1.exe
PID 4744 wrote to memory of 1392	4744	242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe	systeminf2.exe
PID 4744 wrote to memory of 1392	4744	242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe	systeminf2.exe
PID 4744 wrote to memory of 1392	4744	242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe	systeminf2.exe
PID 1392 wrote to memory of 2468	1392	systeminf2.exe	cmd.exe
PID 1392 wrote to memory of 2468	1392	systeminf2.exe	cmd.exe
PID 1392 wrote to memory of 2468	1392	systeminf2.exe	cmd.exe
PID 1392 wrote to memory of 4868	1392	systeminf2.exe	cmd.exe
PID 1392 wrote to memory of 4868	1392	systeminf2.exe	cmd.exe
PID 1392 wrote to memory of 4868	1392	systeminf2.exe	cmd.exe
PID 1392 wrote to memory of 2856	1392	systeminf2.exe	cmd.exe
PID 1392 wrote to memory of 2856	1392	systeminf2.exe	cmd.exe
PID 1392 wrote to memory of 2856	1392	systeminf2.exe	cmd.exe
PID 2468 wrote to memory of 5072	2468	cmd.exe	attrib.exe
PID 2468 wrote to memory of 5072	2468	cmd.exe	attrib.exe
PID 2468 wrote to memory of 5072	2468	cmd.exe	attrib.exe
PID 4868 wrote to memory of 4320	4868	cmd.exe	attrib.exe
PID 4868 wrote to memory of 4320	4868	cmd.exe	attrib.exe
PID 4868 wrote to memory of 4320	4868	cmd.exe	attrib.exe
PID 2856 wrote to memory of 3552	2856	cmd.exe	PING.EXE
PID 2856 wrote to memory of 3552	2856	cmd.exe	PING.EXE
PID 2856 wrote to memory of 3552	2856	cmd.exe	PING.EXE
PID 1392 wrote to memory of 1820	1392	systeminf2.exe	msdcsc.exe
PID 1392 wrote to memory of 1820	1392	systeminf2.exe	msdcsc.exe
PID 1392 wrote to memory of 1820	1392	systeminf2.exe	msdcsc.exe
PID 1820 wrote to memory of 4160	1820	msdcsc.exe	iexplore.exe
PID 1820 wrote to memory of 4160	1820	msdcsc.exe	iexplore.exe
PID 1820 wrote to memory of 4160	1820	msdcsc.exe	iexplore.exe
PID 1820 wrote to memory of 4160	1820	msdcsc.exe	iexplore.exe
PID 1820 wrote to memory of 4160	1820	msdcsc.exe	iexplore.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

5072 attrib.exe
4320 attrib.exe

pid	process
5072	attrib.exe
4320	attrib.exe

C:\Users\Admin\AppData\Local\Temp\242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe
"C:\Users\Admin\AppData\Local\Temp\242f31359003b155e7b63772a3178e08ee4ed985f9997bfceb736b9b9ec15e21.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4744

C:\Windows\SysWOW64\systeminf1.exe
"C:\Windows\system32\systeminf1.exe"
2⤵
- Executes dropped EXE
PID:3752

C:\Windows\SysWOW64\systeminf2.exe
"C:\Windows\system32\systeminf2.exe"
2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1392

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\SysWOW64\systeminf2.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:2468

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\SysWOW64\systeminf2.exe" +s +h
4⤵
- Sets file to hidden
- Drops file in System32 directory
- Views/modifies file attributes
PID:5072

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\SysWOW64" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:4868

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\SysWOW64" +s +h
4⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:4320

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k ping 127.0.0.1 -n 4 && del "C:\Windows\SysWOW64\systeminf2.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:2856

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 4
4⤵
- Runs ping.exe
PID:3552

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Executes dropped EXE
- Windows security modification
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1820

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
4⤵
- Modifies firewall policy service
- Modifies security service
- Windows security bypass
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4160

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

T1082

Remote System Discovery