Possible System Owner or User Enumeration - Linux (via auditd)

title: Possible System Owner or User Enumeration - Linux (via auditd)
id: 0fc86150-a925-5491-bdd4-dc091d70b7bd
status: stable
description: This rule detects the execution of host or user discovery utilities such as "whoami", "hostname", "id", etc. Adversaries may use the information from System Owner/User Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
references:
    - https://attack.mitre.org/techniques/T1033/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1033/T1033.md
author: Huntrule Team
date: 2026-02-11
tags:
    - attack.discovery
    - attack.t1033
logsource:
    product: linux
    service: auditd
detection:
    selection:
        type: 'EXECVE'
        a0:
            - 'hostname'
            - 'id'
            - 'last'
            - 'uname'
            - 'users'
            - 'w'
            - 'who'
            - 'whoami'
    condition: selection
falsepositives:
    - Unknown
level: low