Run PowerShell Script from ADS — Sigma Rule

Rule metadata and linked tags

Author: Sergey Soldatov, Kaspersky Lab, oscd.community. Source status: test; severity: high. Source dates: 2019-10-30 / 2022-07-14.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 7bb4c2c47447e357ef4469fb20a629b91422a2cdf817925c8f4dae1fad82f8de

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: Run PowerShell Script from ADS
id: 45a594aa-1fbd-4972-a809-ff5a99dd81b8
status: test
description: Detects PowerShell script execution from Alternate Data Stream (ADS)
references:
    - https://github.com/p0shkatz/Get-ADS/blob/1c3a3562e713c254edce1995a7d9879c687c7473/Get-ADS.ps1
author: Sergey Soldatov, Kaspersky Lab, oscd.community
date: 2019-10-30
modified: 2022-07-14
tags:
    - attack.stealth
    - attack.t1564.004
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith:
            - '\powershell.exe'
            - '\pwsh.exe'
        Image|endswith:
            - '\powershell.exe'
            - '\pwsh.exe'
        CommandLine|contains|all:
            - 'Get-Content'
            - '-Stream'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/p0shkatz/Get-ADS/blob/1c3a3562e713c254edce1995a7d9879c687c7473/Get-ADS.ps1