Possible Linux Network Service Scanning - Auditd (via auditd)

title: Possible Linux Network Service Scanning - Auditd (via auditd)
id: 65821a32-e21d-5a93-941b-8d0bf46303b8
status: stable
description: This rule detects enumeration of local or remote network services.
references:
    - https://attack.mitre.org/techniques/T1046/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1046/T1046.md
author: Huntrule Team
date: 2026-05-14
tags:
    - attack.discovery
    - attack.t1046
logsource:
    product: linux
    service: auditd
    definition: 'Configure these rules https://github.com/Neo23x0/auditd/blob/e181243a7c708e9d579557d6f80e0ed3d3483b89/audit.rules#L182-L183'
detection:
    selection:
        type: 'SYSCALL'
        exe|endswith:
            - '/telnet'
            - '/nmap'
            - '/netcat'
            - '/nc'
            - '/ncat'
            - '/nc.openbsd'
        key: 'network_connect_4'
    condition: selection
falsepositives:
    - Unknown
level: low