Data Exfiltration to Unsanctioned Apps — Sigma Rule

Rule metadata and linked tags

Author: Austin Songer @austinsonger. Source status: test; severity: medium. Source dates: 2021-08-23 / 2022-10-09.

{
  "service": "threat_management",
  "product": "m365"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 2192f79aee03d4e4e84da2a1fe67a38777d04e2759ea91621ceeaece1b44d285

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Data Exfiltration to Unsanctioned Apps
id: 2b669496-d215-47d8-bd9a-f4a45bf07cda
status: test
description: Detects when a Microsoft Cloud App Security reported when a user or IP address uses an app that is not sanctioned to perform an activity that resembles an attempt to exfiltrate information from your organization.
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
    - attack.t1537
logsource:
    service: threat_management
    product: m365
detection:
    selection:
        eventSource: SecurityComplianceCenter
        eventName: 'Data exfiltration to unsanctioned apps'
        status: success
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source 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