System Network Discovery - Linux — Sigma Rule

Rule metadata and linked tags

Author: Ömer Günal and remotephone, oscd.community. Source status: test; severity: informational. Source dates: 2020-10-06 / 2022-09-15.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a7b4fa79d7eff4112be7a51b0bb1ce697a63561393e550c7b545fefae9b7b0c9

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 Discovery - Linux
id: e7bd1cfa-b446-4c88-8afb-403bcd79e3fa
status: test
description: Detects enumeration of local network configuration
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1016/T1016.md
author: Ömer Günal and remotephone, oscd.community
date: 2020-10-06
modified: 2022-09-15
tags:
    - attack.discovery
    - attack.t1016
logsource:
    category: process_creation
    product: linux
detection:
    selection_img:
        Image|endswith:
            - '/firewall-cmd'
            - '/ufw'
            - '/iptables'
            - '/netstat'
            - '/ss'
            - '/ip'
            - '/ifconfig'
            - '/systemd-resolve'
            - '/route'
    selection_cli:
        CommandLine|contains: '/etc/resolv.conf'
    condition: 1 of selection_*
falsepositives:
    - Legitimate administration activities
level: informational

Original YAML and metadata in JSON

False positives

• Legitimate administration activities

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1016/T1016.md