Trap Signals Execution

Identify activity related where adversaries can include a trap command which then allows programs and shells to specify commands that will be executed upon receiving interrupt signals.

Rule type: eql
Rule indices:

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

Rule Severity: low
Risk Score: 21
Runs every: 60m
Searches indices from: now-119m
Maximum alerts per execution: ?
References:

Tags:

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

Version: ?
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 == "trap" and process.args : "SIG*"

Framework: MITRE ATT&CK

• Tactic:

  • Name: Privilege Escalation
  • Id: TA0004
  • Reference URL: https://attack.mitre.org/tactics/TA0004/

• Technique:

  • Name: Event Triggered Execution
  • Id: T1546
  • Reference URL: https://attack.mitre.org/techniques/T1546/

• Sub Technique:

  • Name: Trap
  • Id: T1546.005
  • Reference URL: https://attack.mitre.org/techniques/T1546/005/