HackTool - SharpEvtMute DLL Load — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-09-07 / 2024-11-23.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 99281e45908d1bf79d3f1b15a2d04714a9f1522a0ce0679a5a10a8b4fbf5085b

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: HackTool - SharpEvtMute DLL Load
id: 49329257-089d-46e6-af37-4afce4290685
related:
    - id: bedfc8ad-d1c7-4e37-a20e-e2b0dbee759c # Process Creation
      type: similar
status: test
description: Detects the load of EvtMuteHook.dll, a key component of SharpEvtHook, a tool that tampers with the Windows event logs
references:
    - https://github.com/bats3c/EvtMute
author: Florian Roth (Nextron Systems)
date: 2022-09-07
modified: 2024-11-23
tags:
    - attack.defense-impairment
    - attack.t1685.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        Hashes|contains: 'IMPHASH=330768A4F172E10ACB6287B87289D83B'
    condition: selection
falsepositives:
    - Other DLLs with the same Imphash
level: high

Original YAML and metadata in JSON

False positives

• Other DLLs with the same Imphash

Source references

• https://github.com/bats3c/EvtMute