Linux Doas Tool Execution — Sigma Rule

Rule metadata and linked tags

Author: Sittikorn S, Teoderick Contreras. Source status: stable; severity: low. Source dates: 2022-01-20 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 78f8e051bb342d74b0a78af55560e3d757f5fe589f3fb9638b9c1a6c8b8a925c

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 Tool Execution
id: 067d8238-7127-451c-a9ec-fa78045b618b
status: stable
description: Detects the doas tool execution in linux host platform. This utility tool allow standard users to perform tasks as root, the same way sudo does.
references:
    - https://research.splunk.com/endpoint/linux_doas_tool_execution/
    - https://www.makeuseof.com/how-to-install-and-use-doas/
author: Sittikorn S, Teoderick Contreras
date: 2022-01-20
tags:
    - attack.privilege-escalation
    - attack.t1548
logsource:
    product: linux
    category: process_creation
detection:
    selection:
        Image|endswith: '/doas'
    condition: selection
falsepositives:
    - Unlikely
level: low

Original YAML and metadata in JSON

False positives

• Unlikely

Source references

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