New CA Policy by Non-approved Actor — Sigma Rule

Rule metadata and linked tags

Author: Corissa Koopmans, '@corissalea'. Source status: test; severity: medium. Source dates: 2022-07-18 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 3098c2370545bef9f8bbd32eb7babcf4fea0b7a3b809ae84f003dfd84b3943c1

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: New CA Policy by Non-approved Actor
id: 0922467f-db53-4348-b7bf-dee8d0d348c6
status: test
description: Monitor and alert on conditional access changes.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-infrastructure
author: Corissa Koopmans, '@corissalea'
date: 2022-07-18
tags:
    - attack.privilege-escalation
    - attack.t1548
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Add conditional access policy
    condition: selection
falsepositives:
    - Misconfigured role permissions
    - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
level: medium

Original YAML and metadata in JSON

False positives

• Misconfigured role permissions
• Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.

Source references

• https://learn.microsoft.com/en-us/entra/architecture/security-operations-infrastructure