Sigma rule: Clear PowerShell History - PowerShell

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-d5c0dff53501, updated 2022-12-02T00:00:00.000Z.

Rule

Title
Clear PowerShell History - PowerShell
Status
test
Level
medium
Author
Ilyas Ochkov, Jonhnathan Ribeiro, Daniil Yugoslavskiy, oscd.community
Date
2022-01-25
Modified
2022-12-02
File
rules/windows/powershell/powershell_script/posh_ps_clear_powershell_history.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects keywords that could indicate clearing PowerShell history

Log source

product
windows
category
ps_script
definition
Requirements: Script Block Logging must be enabled

Detection

selection1a:
    ScriptBlockText|contains:
        - 'del'
        - 'Remove-Item'
        - 'rm'
selection1b:
    ScriptBlockText|contains: '(Get-PSReadlineOption).HistorySavePath'
selection_2:
    ScriptBlockText|contains|all:
        - 'Set-PSReadlineOption'
        - '–HistorySaveStyle'  # not sure if the homoglyph –/- is intended, just checking for both
        - 'SaveNothing'
selection_3:
    ScriptBlockText|contains|all:
        - 'Set-PSReadlineOption'
        - '-HistorySaveStyle'
        - 'SaveNothing'
condition: 1 of selection_* or all of selection1*

False positives (as the rule lists them)

  • Legitimate PowerShell scripts

Tags

  • attack.stealth
  • attack.t1070.003

MITRE ATT&CK ids this rule names

Related rules

  • dfba4ce1-e0ea-495f-986e-97140f31af2d (derived)

References

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_clear_powershell_history.yml

Sources and licences

  • SigmaHQ

    "Clear PowerShell History - PowerShell" by Ilyas Ochkov, Jonhnathan Ribeiro, Daniil Yugoslavskiy, oscd.community (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/powershell/powershell_script/posh_ps_clear_powershell_history.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Clear PowerShell History - PowerShell",
entity page, dataset version ref-d5c0dff53501, updated 2022-12-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/26b692dc-1722-49b2-b496-a8258aa6371d (accessed 2026-11-03).
Underlying source: SigmaHQ rule 26b692dc-1722-49b2-b496-a8258aa6371d, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.