Elastic Security Detection Rules

M365 Security Compliance Unusual Volume of File Deletion

Last updated 22 days ago on 2025-12-10
Created 4 years ago on 2021-07-15

About

Identifies that a user has deleted an unusually large volume of files as reported by Microsoft Cloud App Security.
Tags
Domain: CloudData Source: Microsoft 365Use Case: Configuration AuditTactic: ImpactLanguage: kuery
Severity
medium
Risk Score
47
MITRE ATT&CK™

Impact (TA0040)(external, opens in a new tab or window)

↳ Data Destruction (T1485)(external, opens in a new tab or window)

False Positive Examples
Users or System Administrator cleaning out folders.
License
Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-o365.audit-*filebeat-*
Related Integrations

o365(external, opens in a new tab or window)

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

Install detection rules in Elastic Security

Detect M365 Security Compliance Unusual Volume of File Deletion 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(external, opens in a new tab or window).