PowerShell Keylogging Script

Detects the use of Win32 API Functions that can be used to capture user Keystrokes in PowerShell Scripts. Attackers use this technique to capture user input, looking for credentials and/or other valuable data.

Rule type: query

Rule indices:

winlogbeat-*
logs-windows.*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Host
Windows
Threat Detection
Collection

Version: 1

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

event.category:process and
  (
   powershell.file.script_block_text : (GetAsyncKeyState or NtUserGetAsyncKeyState or GetKeyboardState or Get-Keystrokes) or
   powershell.file.script_block_text : ((SetWindowsHookA or SetWindowsHookW or SetWindowsHookEx or SetWindowsHookExA or NtUserSetWindowsHookEx) and (GetForegroundWindow or GetWindowTextA or GetWindowTextW or WM_KEYBOARD_LL))
   )

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Collection
- ID: TA0009
- Reference URL: https://attack.mitre.org/tactics/TA0009/
Technique:
- Name: Input Capture
- ID: T1056
- Reference URL: https://attack.mitre.org/techniques/T1056/
Sub-technique:
- Name: Keylogging
- ID: T1056.001
- Reference URL: https://attack.mitre.org/techniques/T1056/001/
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/
Sub-technique:
- Name: PowerShell
- ID: T1059.001
- Reference URL: https://attack.mitre.org/techniques/T1059/001/

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