sigmamediumHunting

Suspicious OAuth App File Download Activities

Detects when a Microsoft Cloud App Security reported when an app downloads multiple files from Microsoft SharePoint or Microsoft OneDrive in a manner that is unusual for the user.

Detection Query

selection:
  eventSource: SecurityComplianceCenter
  eventName: Suspicious OAuth app file download activities
  status: success
condition: selection

Author

Austin Songer @austinsonger

Created

2021-08-23

Data Sources

m365threat_management

Platforms

m365

References

Tags

attack.exfiltration

Raw Content

title: Suspicious OAuth App File Download Activities
id: ee111937-1fe7-40f0-962a-0eb44d57d174
status: test
description: Detects when a Microsoft Cloud App Security reported when an app downloads multiple files from Microsoft SharePoint or Microsoft OneDrive in a manner that is unusual for the user.
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: Austin Songer @austinsonger
date: 2021-08-23
modified: 2022-10-09
tags:
    - attack.exfiltration
logsource:
    service: threat_management
    product: m365
detection:
    selection:
        eventSource: SecurityComplianceCenter
        eventName: 'Suspicious OAuth app file download activities'
        status: success
    condition: selection
falsepositives:
    - Unknown
level: medium