Azure Subscription Permission Elevation Via ActivityLogs — Sigma Rule

Rule metadata and linked tags

Author: Austin Songer @austinsonger. Source status: test; severity: high. Source dates: 2021-11-26 / 2022-08-23.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 5fddfb4ebc4a3d8da5dbd7c402bc839ed878e1d75d5318e010d2773209d2c999

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: Azure Subscription Permission Elevation Via ActivityLogs
id: 09438caa-07b1-4870-8405-1dbafe3dad95
status: test
description: |
    Detects when a user has been elevated to manage all Azure Subscriptions.
    This change should be investigated immediately if it isn't planned.
    This setting could allow an attacker access to Azure subscriptions in your environment.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftauthorization
author: Austin Songer @austinsonger
date: 2021-11-26
modified: 2022-08-23
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078.004
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName: MICROSOFT.AUTHORIZATION/ELEVATEACCESS/ACTION
    condition: selection
falsepositives:
    - If this was approved by System Administrator.
level: high

Original YAML and metadata in JSON

False positives

• If this was approved by System Administrator.

Source references

• https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftauthorization