HackTool - SharpEvtMute Execution — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-09-07 / 2023-02-14.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 5bd3d659be12dbb0b23e4f5178a59c46dfe1f52767b4965e007dfb36fedc6a5d

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 Execution
id: bedfc8ad-d1c7-4e37-a20e-e2b0dbee759c
related:
    - id: 49329257-089d-46e6-af37-4afce4290685 # DLL load
      type: similar
status: test
description: Detects the use 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: 2023-02-14
tags:
    - attack.defense-impairment
    - attack.t1685.001
logsource:
    product: windows
    category: process_creation
detection:
    selection:
        - Image|endswith: '\SharpEvtMute.exe'
        - Description: 'SharpEvtMute'
        - CommandLine|contains:
              - '--Filter "rule '
              - '--Encoded --Filter \"'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/bats3c/EvtMute