System Owner/User Discovery Linux

Elastic Stack Serverless Security

Identifies the use of built-in tools which adversaries may use to enumerate the system owner/user of a compromised system.

Rule type: eql

Rule indices:

• logs-endpoint.events.*
• endgame-*
• auditbeat-*
• logs-auditd_manager.auditd-*

Severity: low

Risk score: 21

Runs every: 60m

Searches indices from: now-119m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

• Domain: Endpoint
• OS: Linux
• Use Case: Threat Detection
• Tactic: Discovery
• Rule Type: BBR
• Data Source: Elastic Defend
• Data Source: Elastic Endgame
• Data Source: Auditd Manager

Version: 3

Rule authors:

• Elastic

Rule license: Elastic License v2

process where event.type == "start" and event.action in ("exec", "exec_event", "executed", "process_started") and
process.name : ("whoami", "w", "who", "users", "id")

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Discovery
  • ID: TA0007
  • Reference URL: https://attack.mitre.org/tactics/TA0007/

• Technique:

  • Name: System Owner/User Discovery
  • ID: T1033
  • Reference URL: https://attack.mitre.org/techniques/T1033/

• Technique:

  • Name: Permission Groups Discovery
  • ID: T1069
  • Reference URL: https://attack.mitre.org/techniques/T1069/