ETW Logging Disabled For rpcrt4.dll — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: low. Source dates: 2022-12-09 / 2023-08-17.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: dbd920f0f17e766808a378518ce31e08c0ff52abe61853539c8db5cccadd923a

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: ETW Logging Disabled For rpcrt4.dll
id: 90f342e1-1aaa-4e43-b092-39fda57ed11e
status: test
description: Detects changes to the "ExtErrorInformation" key in order to disable ETW logging for rpcrt4.dll
references:
    - http://redplait.blogspot.com/2020/07/whats-wrong-with-etw.html
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-12-09
modified: 2023-08-17
tags:
    - attack.persistence
    - attack.defense-impairment
    - attack.t1112
    - attack.t1685
logsource:
    product: windows
    category: registry_set
detection:
    selection:
        TargetObject|endswith: '\Microsoft\Windows NT\Rpc\ExtErrorInformation'
        Details:
            # This is disabled by default for some reason
            - 'DWORD (0x00000000)' # Off
            - 'DWORD (0x00000002)' # Off with exceptions
    condition: selection
falsepositives:
    - Unknown
level: low

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• http://redplait.blogspot.com/2020/07/whats-wrong-with-etw.html