459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af

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"	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.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"	MusaLLaT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral2/memory/792-0-0x0000000000400000-0x00000000004E4000-memory.dmp	UPX
behavioral2/memory/792-3-0x0000000000400000-0x00000000004E4000-memory.dmp	UPX
behavioral2/files/0x0008000000023260-8.dat	UPX
behavioral2/memory/792-12-0x0000000000400000-0x00000000004E4000-memory.dmp	UPX
behavioral2/memory/3304-18-0x0000000000400000-0x00000000004E4000-memory.dmp	UPX
behavioral2/memory/3304-19-0x0000000000400000-0x00000000004E4000-memory.dmp	UPX

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
3304	MusaLLaT.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/792-0-0x0000000000400000-0x00000000004E4000-memory.dmp	upx
behavioral2/memory/792-3-0x0000000000400000-0x00000000004E4000-memory.dmp	upx
behavioral2/files/0x0008000000023260-8.dat	upx
behavioral2/memory/792-12-0x0000000000400000-0x00000000004E4000-memory.dmp	upx
behavioral2/memory/3304-18-0x0000000000400000-0x00000000004E4000-memory.dmp	upx
behavioral2/memory/3304-19-0x0000000000400000-0x00000000004E4000-memory.dmp	upx

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"	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	MusaLLaT.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-1-5-21-3808065738-1666277613-1125846146-1000\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"	MusaLLaT.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeBackupPrivilege	792	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe
Token: SeBackupPrivilege	3304	MusaLLaT.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
792	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe
3304	MusaLLaT.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 792 wrote to memory of 3304	792	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe	90
PID 792 wrote to memory of 3304	792	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe	90
PID 792 wrote to memory of 3304	792	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe	90

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"	459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	MusaLLaT.exe

C:\Users\Admin\AppData\Local\Temp\459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe
"C:\Users\Admin\AppData\Local\Temp\459880395f07c30402cbf8e31883fbc85637298604788b7e96b460c39fa612af.exe"
1⤵
- UAC bypass
- Windows security bypass
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:792
- 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
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - System policy modification
  PID:3304

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3868 --field-trial-handle=3088,i,14310325015283915034,7660943942870463106,262144 --variations-seed-version /prefetch:8
1⤵
PID:3864

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