OpenWith.exe Executes Specified Binary — Sigma Rule

Rule metadata and linked tags

Author: Beyu Denis, oscd.community (rule), @harr0ey (idea). Source status: test; severity: high. Source dates: 2019-10-12 / 2021-11-27.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a0681d37191157d8e151030e8a10eff1f4f1dfa33c7749e148ad7e6aab59c944

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: OpenWith.exe Executes Specified Binary
id: cec8e918-30f7-4e2d-9bfa-a59cc97ae60f
status: test
description: The OpenWith.exe executes other binary
references:
    - https://github.com/LOLBAS-Project/LOLBAS/blob/4db780e0f0b2e2bb8cb1fa13e09196da9b9f1834/yml/LOLUtilz/OSBinaries/Openwith.yml
    - https://twitter.com/harr0ey/status/991670870384021504
author: Beyu Denis, oscd.community (rule), @harr0ey (idea)
date: 2019-10-12
modified: 2021-11-27
tags:
    - attack.stealth
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\OpenWith.exe'
        CommandLine|contains: '/c'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/LOLBAS-Project/LOLBAS/blob/4db780e0f0b2e2bb8cb1fa13e09196da9b9f1834/yml/LOLUtilz/OSBinaries/Openwith.yml
• https://twitter.com/harr0ey/status/991670870384021504