Disable of ETW Trace - Powershell — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: high. Source dates: 2022-06-28 / 2022-11-25.

{
  "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: 6c4f908ce0850656bb0b49df10ec19afc87877681150f5fe11b37125c1f4363a

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: Disable of ETW Trace - Powershell
id: 115fdba9-f017-42e6-84cf-d5573bf2ddf8
related:
    - id: a238b5d0-ce2d-4414-a676-7a531b3d13d6
      type: derived
status: test
description: Detects usage of powershell cmdlets to disable or remove ETW trace sessions
references:
    - https://medium.com/palantir/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-28
modified: 2022-11-25
tags:
    - attack.stealth
    - attack.defense-impairment
    - attack.t1070
    - attack.t1685
    - car.2016-04-002
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection_pwsh_remove:   # Autologger provider removal
        ScriptBlockText|contains: 'Remove-EtwTraceProvider '
    selection_pwsh_set:   # Provider “Enable” property modification
        ScriptBlockText|contains|all:
            - 'Set-EtwTraceProvider '
            - '0x11'
    condition: 1 of selection*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://medium.com/palantir/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63