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User Discovery via Whoami

The whoami application was executed on a Linux host. This is often used by tools and persistence mechanisms to test for privileged access.

Rule type: query

Rule indices:

Severity: low

Risk score: 21

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

Tags:

Version: 4 (version history)

Added (Elastic Stack release): 7.6.0

Last modified (Elastic Stack release): 7.9.1

Rule authors: Elastic

Rule license: Elastic License

Security testing tools and frameworks may run this command. Some normal use of this command may originate from automation tools and frameworks.

event.category:process and event.type:(start or process_started) and
process.name:whoami

Framework: MITRE ATT&CK^TM

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/

Version 4 (7.9.1 release)

Version 3 (7.9.0 release)

Updated query, changed from:

process.name:whoami and event.action:executed

Version 2 (7.7.0 release)

Updated query, changed from:

process.name: whoami and event.action:executed