PowerShell Get-Process LSASS — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2021-04-23 / 2023-01-05.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: c8ca81f126d160832f93ae3e18745b9d365e311bc26596cd5f12b7c88d1c29b3

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: PowerShell Get-Process LSASS
id: b2815d0d-7481-4bf0-9b6c-a4c48a94b349
status: test
description: Detects a "Get-Process" cmdlet and it's aliases on lsass process, which is in almost all cases a sign of malicious activity
references:
    - https://web.archive.org/web/20220205033028/https://twitter.com/PythonResponder/status/1385064506049630211
author: Florian Roth (Nextron Systems)
date: 2021-04-23
modified: 2023-01-05
tags:
    - attack.credential-access
    - attack.t1552.004
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains:
            # You can add more permutation as you see fit
            - 'Get-Process lsas'
            - 'ps lsas'
            - 'gps lsas'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://web.archive.org/web/20220205033028/https://twitter.com/PythonResponder/status/1385064506049630211