687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,,C:\\Program Files (x86)\\Windows NT\\tTKhxRih.exe"	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,,C:\\Program Files (x86)\\Windows NT\\tTKhxRih.exe"	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

Modify Existing Service

T1031

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	GseJLqDH.exe

Modifies security service 2 TTPs 4 IoCs

evasion

Modify Registry

Modify Existing Service

T1031

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\WinDefend\Start = "4"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wuauserv\Start = "4"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\MpsSvc\Start = "4"	GseJLqDH.exe

UAC bypass 3 TTPs 1 IoCs

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	GseJLqDH.exe

Windows security bypass 2 TTPs 6 IoCs

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	GseJLqDH.exe

Disables Task Manager via registry modification
evasion

Executes dropped EXE 1 IoCs

pid	Process
940	GseJLqDH.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1628-57-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1628-58-0x0000000000400000-0x0000000000442000-memory.dmp	upx
behavioral1/memory/1628-72-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/940-73-0x0000000000400000-0x0000000000442000-memory.dmp	upx
behavioral1/memory/940-74-0x0000000000400000-0x0000000000442000-memory.dmp	upx
behavioral1/memory/940-75-0x0000000000400000-0x0000000000442000-memory.dmp	upx
behavioral1/memory/940-76-0x0000000000400000-0x0000000000442000-memory.dmp	upx

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kKrMCuPV.exe	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kKrMCuPV.exe	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kKrMCuPV.exe	GseJLqDH.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kKrMCuPV.exe	GseJLqDH.exe

Loads dropped DLL 2 IoCs

pid	Process
1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe

Windows security modification 2 TTPs 6 IoCs

Disabling Security Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1"	GseJLqDH.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1"	GseJLqDH.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\sRovkZnD = "C:\\Users\\Admin\\AppData\\Local\\Adobe\\YcOGgeSL.exe"	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run	GseJLqDH.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\sRovkZnD = "C:\\Users\\Admin\\AppData\\Local\\Adobe\\YcOGgeSL.exe"	GseJLqDH.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	GseJLqDH.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows NT\tTKhxRih.exe	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
File opened for modification	C:\Program Files (x86)\Windows NT\tTKhxRih.exe	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.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: EnumeratesProcesses 64 IoCs

pid	Process
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe
940	GseJLqDH.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeSecurityPrivilege	1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
Token: SeDebugPrivilege	1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
Token: SeTcbPrivilege	1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
Token: SeSecurityPrivilege	940	GseJLqDH.exe
Token: SeDebugPrivilege	940	GseJLqDH.exe
Token: SeTcbPrivilege	940	GseJLqDH.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
940	GseJLqDH.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 940	1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe	27
PID 1628 wrote to memory of 940	1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe	27
PID 1628 wrote to memory of 940	1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe	27
PID 1628 wrote to memory of 940	1628	687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe	27

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	GseJLqDH.exe

C:\Users\Admin\AppData\Local\Temp\687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe
"C:\Users\Admin\AppData\Local\Temp\687923489c3fdd71fb190410d42ab16fadc5b31ded0a5d2efe2aed34d230d29f.exe"
1⤵
- Modifies WinLogon for persistence
- Drops startup file
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Users\Admin\AppData\Local\Temp\GseJLqDH.exe
  "C:\Users\Admin\AppData\Local\Temp\GseJLqDH.exe"
  2⤵
  - Modifies firewall policy service
  - Modifies security service
  - UAC bypass
  - Windows security bypass
  - Executes dropped EXE
  - Drops startup file
  - Windows security modification
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of UnmapMainImage
  - System policy modification
  PID:940

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

Modify Registry