Microsoft 365 Potential ransomware activity

edit

Microsoft 365 Potential ransomware activity

edit

Identifies when Microsoft Cloud App Security reports that a user has uploaded files to the cloud that might be infected with ransomware.

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

References:

Tags:

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

Version: 102

Rule authors:

  • Austin Songer

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit
event.dataset:o365.audit and event.provider:SecurityComplianceCenter and event.category:web and event.action:"Potential ransomware activity" and event.outcome:success

Framework: MITRE ATT&CKTM