System Network Connections Discovery - MacOs — Sigma Rule

Rule metadata and linked tags

Author: Daniil Yugoslavskiy, oscd.community. Source status: test; severity: informational. Source dates: 2020-10-19 / 2022-12-28.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: d61dd9d937e25ca53c7b2b7fd6fc0b128f101685fe093a0ef1924da1ba30d405

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: System Network Connections Discovery - MacOs
id: 9a7a0393-2144-4626-9bf1-7c2f5a7321db
status: test
description: Detects usage of system utilities to discover system network connections
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1049/T1049.md
author: Daniil Yugoslavskiy, oscd.community
date: 2020-10-19
modified: 2022-12-28
tags:
    - attack.discovery
    - attack.t1049
logsource:
    category: process_creation
    product: macos
detection:
    selection:
        Image|endswith:
            - '/who'
            - '/w'
            - '/last'
            - '/lsof'
            - '/netstat'
    condition: selection
falsepositives:
    - Legitimate activities
level: informational

Original YAML and metadata in JSON

False positives

• Legitimate activities

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1049/T1049.md