Remote Access Tool - Team Viewer Session Started On MacOS Host — Sigma Rule

Rule metadata and linked tags

Author: Josh Nickels, Qi Nan. Source status: test; severity: low. Source dates: 2024-03-11 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 5b8689beaf3ab3a1d37e94266f418a110fe61d61bab027a37bcd402b8d4ccdae

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: Remote Access Tool - Team Viewer Session Started On MacOS Host
id: f459ccb4-9805-41ea-b5b2-55e279e2424a
related:
    - id: ab70c354-d9ac-4e11-bbb6-ec8e3b153357
      type: similar
    - id: 1f6b8cd4-3e60-47cc-b282-5aa1cbc9182d
      type: similar
status: test
description: |
    Detects the command line executed when TeamViewer starts a session started by a remote host.
    Once a connection has been started, an investigator can verify the connection details by viewing the "incoming_connections.txt" log file in the TeamViewer folder.
references:
    - Internal Research
author: Josh Nickels, Qi Nan
date: 2024-03-11
tags:
    - attack.persistence
    - attack.initial-access
    - attack.t1133
logsource:
    category: process_creation
    product: macos
detection:
    selection:
        ParentImage|endswith: '/TeamViewer_Service'
        Image|endswith: '/TeamViewer_Desktop'
        CommandLine|endswith: '/TeamViewer_Desktop --IPCport 5939 --Module 1'
    condition: selection
falsepositives:
    - Legitimate usage of TeamViewer
level: low

Original YAML and metadata in JSON

False positives

• Legitimate usage of TeamViewer

Source references

• Internal Research (source note; no public URL supplied)