Sigma rule: PowerShell Get-Process LSASS in ScriptBlock

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-d6716b70f7dc, updated 2022-12-25T00:00:00.000Z.

Rule

Title
PowerShell Get-Process LSASS in ScriptBlock
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2021-04-23
Modified
2022-12-25
File
rules/windows/powershell/powershell_script/posh_ps_susp_getprocess_lsass.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects a Get-Process command on lsass process, which is in almost all cases a sign of malicious activity

Log source

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

Detection

selection:
    ScriptBlockText|contains: 'Get-Process lsass'
condition: selection

False positives (as the rule lists them)

  • Legitimate certificate exports invoked by administrators or users (depends on processes in the environment - filter if unusable)

Tags

  • attack.credential-access
  • attack.t1003.001

MITRE ATT&CK ids this rule names

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_susp_getprocess_lsass.yml

Sources and licences

  • SigmaHQ

    "PowerShell Get-Process LSASS in ScriptBlock" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/powershell/powershell_script/posh_ps_susp_getprocess_lsass.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: PowerShell Get-Process LSASS in ScriptBlock",
entity page, dataset version ref-d6716b70f7dc, updated 2022-12-25T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/84c174ab-d3ef-481f-9c86-a50d0b8e3edb (accessed 2026-11-03).
Underlying source: SigmaHQ rule 84c174ab-d3ef-481f-9c86-a50d0b8e3edb, 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.