9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe = "0"	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe

Detects executables packed with or use KoiVM 1 IoCs

resource	yara_rule
behavioral2/memory/2068-3-0x00000155C3250000-0x00000155C32EA000-memory.dmp	INDICATOR_EXE_Packed_KoiVM

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	grpconv.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\MRJ8YPRPZPT = "C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe"	grpconv.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2744	powershell.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe = "0"	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2068 set thread context of 4192	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	88
PID 4192 set thread context of 3404	4192	iexplore.exe	56
PID 4192 set thread context of 3376	4192	iexplore.exe	94
PID 3376 set thread context of 3404	3376	grpconv.exe	56

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2744	powershell.exe
2744	powershell.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
4192	iexplore.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe
3376	grpconv.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4192	iexplore.exe
3404	Explorer.EXE
3404	Explorer.EXE
3376	grpconv.exe
3376	grpconv.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2744	powershell.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
3404	Explorer.EXE
3404	Explorer.EXE
3404	Explorer.EXE

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3404	Explorer.EXE
3404	Explorer.EXE
3404	Explorer.EXE

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3404	Explorer.EXE

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 2744	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	86
PID 2068 wrote to memory of 2744	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	86
PID 2068 wrote to memory of 4192	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	88
PID 2068 wrote to memory of 4192	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	88
PID 2068 wrote to memory of 4192	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	88
PID 2068 wrote to memory of 4192	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	88
PID 2068 wrote to memory of 4192	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	88
PID 2068 wrote to memory of 4192	2068	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe	88
PID 3404 wrote to memory of 3376	3404	Explorer.EXE	94
PID 3404 wrote to memory of 3376	3404	Explorer.EXE	94
PID 3404 wrote to memory of 3376	3404	Explorer.EXE	94

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"	9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3404
- C:\Users\Admin\AppData\Local\Temp\9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe
  "C:\Users\Admin\AppData\Local\Temp\9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe"
  2⤵
  - UAC bypass
  - Windows security bypass
  - Checks computer location settings
  - Windows security modification
  - Checks whether UAC is enabled
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:2068
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\9c581c4cec9f25a55ee985d08ad3ba40a268aff6ea05aebff399c31f86b98065.exe" -Force
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2744
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    PID:4192
- C:\Windows\SysWOW64\grpconv.exe
  "C:\Windows\SysWOW64\grpconv.exe"
  2⤵
  - Adds policy Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  PID:3376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

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

T1562

Disable or Modify Tools

Modify Registry