534dfe46d8f1d00d8a2d7024dde228f328ab2dc4ef948b3da17f0849e08d22d8

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"	WinLock.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths	WinLock.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\WinLock.exe = "0"	WinLock.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
2060	powershell.exe

Event Triggered Execution: Image File Execution Options Injection 1 TTPs 12 IoCs

persistence

Image File Execution Options Injection

T1546.012

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinLock.exe"	WinLock.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe	WinLock.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\utilman.exe	WinLock.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\utilman.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinLock.exe"	WinLock.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\reg.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinLock.exe"	WinLock.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	WinLock.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe	WinLock.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinLock.exe"	WinLock.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\reg.exe	WinLock.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\cmd.exe	WinLock.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\cmd.exe\Debugger = "\"cmd.exe\",\"C:\\Users\\Admin\\AppData\\Local\\Temp\\WinLock.exe\""	WinLock.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinLock.exe"	WinLock.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\WinLock.exe = "0"	WinLock.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths	WinLock.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions	WinLock.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\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Qwe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WinLock.exe"	WinLock.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"	WinLock.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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	WinLock.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinLock.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinLock.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WinLock.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
2312	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
2060	powershell.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe
1968	WinLock.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1968	WinLock.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeBackupPrivilege	1968	WinLock.exe
Token: SeRestorePrivilege	1968	WinLock.exe
Token: SeDebugPrivilege	1968	WinLock.exe
Token: SeDebugPrivilege	2060	powershell.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 2052	1968	WinLock.exe	30
PID 1968 wrote to memory of 2052	1968	WinLock.exe	30
PID 1968 wrote to memory of 2052	1968	WinLock.exe	30
PID 1968 wrote to memory of 2052	1968	WinLock.exe	30
PID 1968 wrote to memory of 2060	1968	WinLock.exe	31
PID 1968 wrote to memory of 2060	1968	WinLock.exe	31
PID 1968 wrote to memory of 2060	1968	WinLock.exe	31
PID 1968 wrote to memory of 2060	1968	WinLock.exe	31
PID 2052 wrote to memory of 2312	2052	cmd.exe	34
PID 2052 wrote to memory of 2312	2052	cmd.exe	34
PID 2052 wrote to memory of 2312	2052	cmd.exe	34
PID 2924 wrote to memory of 2600	2924	taskeng.exe	38
PID 2924 wrote to memory of 2600	2924	taskeng.exe	38
PID 2924 wrote to memory of 2600	2924	taskeng.exe	38
PID 2924 wrote to memory of 2600	2924	taskeng.exe	38
PID 2924 wrote to memory of 1264	2924	taskeng.exe	39
PID 2924 wrote to memory of 1264	2924	taskeng.exe	39
PID 2924 wrote to memory of 1264	2924	taskeng.exe	39
PID 2924 wrote to memory of 1264	2924	taskeng.exe	39

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	WinLock.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	WinLock.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\HideFastUserSwitching = "1"	WinLock.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\WinLock.exe
"C:\Users\Admin\AppData\Local\Temp\WinLock.exe"
1⤵
- UAC bypass
- Windows security bypass
- Event Triggered Execution: Image File Execution Options Injection
- Windows security modification
- Adds Run key to start application
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1968
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /tn "GoogleUpdateTaskMachineUK" /sc MINUTE /mo 1 /tr "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" /rl HIGHEST /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "GoogleUpdateTaskMachineUK" /sc MINUTE /mo 1 /tr "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2312
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\WinLock.exe'"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2060

C:\Users\Admin\AppData\Local\Temp\WinLock.exe
C:\Users\Admin\AppData\Local\Temp\WinLock.exe explorer.exe
1⤵
- System Location Discovery: System Language Discovery
PID:2772

C:\Windows\system32\taskeng.exe
taskeng.exe {C4563963-3543-471E-BB14-C9D0DB1CCB3C} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2924
- C:\Users\Admin\AppData\Local\Temp\WinLock.exe
  C:\Users\Admin\AppData\Local\Temp\WinLock.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2600
- C:\Users\Admin\AppData\Local\Temp\WinLock.exe
  C:\Users\Admin\AppData\Local\Temp\WinLock.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1264

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Scheduled Task/Job

T1053

Scheduled Task

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

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry