Sigma rule: Powershell Keylogging

Rule

Title

Powershell Keylogging

Status

test

Level

medium

Author

frack113

Date

2021-07-30

Modified

2022-07-11

File

rules/windows/powershell/powershell_script/posh_ps_keylogging.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Adversaries may log user keystrokes to intercept credentials as the user types them.

Log source

product

windows

category

ps_script

definition

Requirements: Script Block Logging must be enabled

Detection

selection_basic:
    ScriptBlockText|contains: 'Get-Keystrokes'
selection_high: # want to run in background and keyboard
    ScriptBlockText|contains|all:
        - 'Get-ProcAddress user32.dll GetAsyncKeyState'
        - 'Get-ProcAddress user32.dll GetForegroundWindow'
condition: 1 of selection_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.credential-access
• attack.collection
• attack.t1056.001

MITRE ATT&CK ids this rule names

• T1056.001

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218/T1218.md
• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1056.001/src/Get-Keystrokes.ps1

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/powershell/powershell_script/posh_ps_keylogging.yml