Elastic Security Detection Rules

System Owner/User Discovery Linux

Last updated a month ago on 2025-10-17
Created 2 years ago on 2023-07-10

About

Identifies the use of built-in tools which adversaries may use to enumerate the system owner/user of a compromised system.
Tags
Domain: EndpointOS: LinuxUse Case: Threat DetectionTactic: DiscoveryRule Type: BBRData Source: Elastic DefendData Source: Elastic EndgameData Source: Auditd ManagerData Source: CrowdstrikeLanguage: eql
Severity
low
Risk Score
21
MITRE ATT&CK™

Discovery (TA0007)(opens in a new tab or window)

↳ System Owner/User Discovery (T1033)(opens in a new tab or window)

↳ Permission Groups Discovery (T1069)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-endpoint.events.*endgame-*auditbeat-*logs-auditd_manager.auditd-*logs-crowdstrike.fdr*
Related Integrations

endpoint(opens in a new tab or window)

auditd_manager(opens in a new tab or window)

crowdstrike(opens in a new tab or window)

Query
process where event.type == "start" and event.action in ("exec", "exec_event", "executed", "process_started", "ProcessRollup2") and 
process.name : ("whoami", "w", "who", "users", "id")

Install detection rules in Elastic Security

Detect System Owner/User Discovery Linux in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).