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Deletion of Bash Command Line History

IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Adversaries may attempt to clear the bash command line history in an attempt to evade detection or forensic investigations.

Rule type: query

Rule indices:

Severity: medium

Risk score: 47

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: 2 (version history)

Added (Elastic Stack release): 7.9.0

Last modified (Elastic Stack release): 7.9.1

Rule authors: Elastic

Rule license: Elastic License

event.category:process AND event.type:(start or process_started) AND
process.name:rm AND
process.args:/\/(home\/.{1,255}|root)\/\.bash_history/

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Clear Command History
- ID: T1146
- Reference URL: https://attack.mitre.org/techniques/T1146/

Version 2 (7.9.1 release)