Linux Doas Conf File Creation — Sigma Rule

Rule metadata and linked tags

Author: Sittikorn S, Teoderick Contreras. Source status: stable; severity: medium. Source dates: 2022-01-20 / 2022-12-31.

{
  "product": "linux",
  "category": "file_event"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 602ec92e16300af72cf92144116558d437c7a91b2ed2d647b936fe9207eabb1e

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: Linux Doas Conf File Creation
id: 00eee2a5-fdb0-4746-a21d-e43fbdea5681
status: stable
description: Detects the creation of doas.conf file in linux host platform.
references:
    - https://research.splunk.com/endpoint/linux_doas_conf_file_creation/
    - https://www.makeuseof.com/how-to-install-and-use-doas/
author: Sittikorn S, Teoderick Contreras
date: 2022-01-20
modified: 2022-12-31
tags:
    - attack.privilege-escalation
    - attack.t1548
logsource:
    product: linux
    category: file_event
detection:
    selection:
        TargetFilename|endswith: '/etc/doas.conf'
    condition: selection
falsepositives:
    - Unlikely
level: medium

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

• https://research.splunk.com/endpoint/linux_doas_conf_file_creation/
• https://www.makeuseof.com/how-to-install-and-use-doas/