Microsoft 365 Unusual Volume of File Deletionedit

Identifies that a user has deleted an unusually large volume of files as reported by Microsoft Cloud App Security.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-o365*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-30m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Domain: Cloud
  • Data Source: Microsoft 365
  • Use Case: Configuration Audit
  • Tactic: Impact

Version: 102

Rule authors:

  • Austin Songer

Rule license: Elastic License v2

Investigation guideedit

Rule queryedit

event.dataset:o365.audit and event.provider:SecurityComplianceCenter and event.category:web and event.action:"Unusual volume of file deletion" and event.outcome:success