App Granted Microsoft Permissions — Sigma Rule

Rule metadata and linked tags

Author: Bailey Bercik '@baileybercik', Mark Morowczynski '@markmorow'. Source status: test; severity: high. Source dates: 2022-07-10 / not supplied.

{
  "product": "azure",
  "service": "auditlogs"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 8055f739ae4b99ce2205c236d7f6f2078485e6c3359e50b7b04d836623171c31

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: App Granted Microsoft Permissions
id: c1d147ae-a951-48e5-8b41-dcd0170c7213
status: test
description: Detects when an application is granted delegated or app role permissions for Microsoft Graph, Exchange, Sharepoint, or Azure AD
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-applications#application-granted-highly-privileged-permissions
author: Bailey Bercik '@baileybercik', Mark Morowczynski '@markmorow'
date: 2022-07-10
tags:
    - attack.credential-access
    - attack.t1528
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message:
            - Add delegated permission grant
            - Add app role assignment to service principal
    condition: selection
falsepositives:
    - When the permission is legitimately needed for the app
level: high

Original YAML and metadata in JSON

False positives

• When the permission is legitimately needed for the app

Source references

• https://learn.microsoft.com/en-us/entra/architecture/security-operations-applications#application-granted-highly-privileged-permissions