sigmaDRL-1.1from SigmaHQ/sigma

Microsoft 365 - Potential Ransomware Activity

Detects when a Microsoft Cloud App Security reported when a user uploads files to the cloud that might be infected with ransomware.

Quality

100

FP risk

—

Forks

Views

ATT&CK techniques

T1486

Rule sourcerules/cloud/m365/threat_management/microsoft365_potential_ransomware_activity.yml

title: Microsoft 365 - Potential Ransomware Activity
id: bd132164-884a-48f1-aa2d-c6d646b04c69
status: test
description: Detects when a Microsoft Cloud App Security reported when a user uploads files to the cloud that might be infected with ransomware.
references:
    - https://learn.microsoft.com/en-us/defender-cloud-apps/anomaly-detection-policy
    - https://learn.microsoft.com/en-us/defender-cloud-apps/policy-template-reference
author: austinsonger
date: 2021-08-19
modified: 2022-10-09
tags:
    - attack.impact
    - attack.t1486
logsource:
    service: threat_management
    product: m365
detection:
    selection:
        eventSource: SecurityComplianceCenter
        eventName: 'Potential ransomware activity'
        status: success
    condition: selection
falsepositives:
    - Unknown
level: medium