838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	MusaLLaT.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	MusaLLaT.exe

Drops file in Drivers directory 2 IoCs

description	ioc	Process
File created	C:\WINDOWS\system32\drivers\etc\hosts	MusaLLaT.exe
File opened for modification	C:\WINDOWS\system32\drivers\etc\hosts	MusaLLaT.exe

Executes dropped EXE 1 IoCs

pid	Process
1904	MusaLLaT.exe

Loads dropped DLL 2 IoCs

pid	Process
2700	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
2700	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe

Windows security modification 2 TTPs 2 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	MusaLLaT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\Software\Microsoft\Windows\CurrentVersion\Run\MusaLLaT = "C:\\Users\\Admin\\AppData\\Roaming\\MusaLLaT.exe"	MusaLLaT.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	MusaLLaT.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2700-0-0x0000000000400000-0x000000000049F000-memory.dmp	upx
behavioral1/files/0x00080000000164dd-6.dat	upx
behavioral1/memory/1904-15-0x0000000000400000-0x000000000049F000-memory.dmp	upx
behavioral1/memory/2700-18-0x0000000000400000-0x000000000049F000-memory.dmp	upx
behavioral1/memory/1904-24-0x0000000000400000-0x000000000049F000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 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	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MusaLLaT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeBackupPrivilege	2700	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
Token: SeBackupPrivilege	1904	MusaLLaT.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2700	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
1904	MusaLLaT.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2700 wrote to memory of 1904	2700	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe	30
PID 2700 wrote to memory of 1904	2700	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe	30
PID 2700 wrote to memory of 1904	2700	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe	30
PID 2700 wrote to memory of 1904	2700	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe	30

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	MusaLLaT.exe

C:\Users\Admin\AppData\Local\Temp\838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe
"C:\Users\Admin\AppData\Local\Temp\838b6c6eee4f261fa8848009180dc4b37f0b3b57835c1619ad62603f6861aa3f.exe"
1⤵
- UAC bypass
- Windows security bypass
- Loads dropped DLL
- Windows security modification
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2700
- C:\Users\Admin\AppData\Roaming\MusaLLaT.exe
  C:\Users\Admin\AppData\Roaming\MusaLLaT.exe
  2⤵
  - UAC bypass
  - Windows security bypass
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Windows security modification
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - System policy modification
  PID:1904

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

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

3

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery