Guest Account Enabled Via Sysadminctl — Sigma Rule

Rule metadata and linked tags

Author: Sohan G (D4rkCiph3r). Source status: test; severity: low. Source dates: 2023-02-18 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 86e01ae89d859893a6b1a628a32e60bac9aeb2ae5671404bbf1cd20403f4d0aa

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: Guest Account Enabled Via Sysadminctl
id: d7329412-13bd-44ba-a072-3387f804a106
status: test
description: Detects attempts to enable the guest account using the sysadminctl utility
references:
    - https://ss64.com/osx/sysadminctl.html
author: Sohan G (D4rkCiph3r)
date: 2023-02-18
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078
    - attack.t1078.001
logsource:
    category: process_creation
    product: macos
detection:
    selection:
        Image|endswith: '/sysadminctl'
        CommandLine|contains|all:
            # By default the guest account is not active
            - ' -guestAccount'
            - ' on'
    condition: selection
falsepositives:
    - Unknown
level: low

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://ss64.com/osx/sysadminctl.html