Possible System Network Connections Enumeration - Linux (via process_creation)

title: Possible System Network Connections Enumeration - Linux (via process_creation)
id: 81d2e66b-bb7b-57cb-9bd1-4428f2431153
status: stable
description: This rule detects use of system utilities to discover system network connections
references:
    - https://attack.mitre.org/techniques/T1049/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1049/T1049.md
author: Huntrule Team
date: 2026-07-27
tags:
    - attack.discovery
    - attack.t1049
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith:
            - '/who'
            - '/w'
            - '/last'
            - '/lsof'
            - '/netstat'
    filter_landscape_sysinfo:
        ParentCommandLine|contains: '/usr/bin/landscape-sysinfo'
        Image|endswith: '/who'
    condition: selection and not 1 of filter_*
falsepositives:
    - Unknown
level: low