Suspicious Process Discovery With Get-Process — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: low. Source dates: 2022-03-17 / not supplied.

{
  "product": "windows",
  "category": "ps_script",
  "definition": "Requirements: Script Block Logging must be enabled"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: fc05a6f8d01b1e8c2da3c6947ade2f1bb7570f96f0c62e123e7d9c7353bf0a3c

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: Suspicious Process Discovery With Get-Process
id: af4c87ce-bdda-4215-b998-15220772e993
status: test
description: Get the processes that are running on the local computer.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1057/T1057.md#atomic-test-3---process-discovery---get-process
    - https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/get-process?view=powershell-7.4
author: frack113
date: 2022-03-17
tags:
    - attack.discovery
    - attack.t1057
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains: Get-Process
    condition: selection
falsepositives:
    - Legitimate PowerShell scripts
level: low

Original YAML and metadata in JSON

False positives

• Legitimate PowerShell scripts

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1057/T1057.md#atomic-test-3---process-discovery---get-process
• https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/get-process?view=powershell-7.4