CA Policy Removed by Non Approved Actor — Sigma Rule

Rule metadata and linked tags

Author: Corissa Koopmans, '@corissalea'. Source status: test; severity: medium. Source dates: 2022-07-19 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 34edc9e2c7a9139001faf41c21c6580eb00b51fb639e43899bb66ace3b96c707

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: CA Policy Removed by Non Approved Actor
id: 26e7c5e2-6545-481e-b7e6-050143459635
status: test
description: Monitor and alert on conditional access changes where non approved actor removed CA Policy.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-infrastructure#conditional-access
author: Corissa Koopmans, '@corissalea'
date: 2022-07-19
tags:
    - attack.privilege-escalation
    - attack.credential-access
    - attack.persistence
    - attack.defense-impairment
    - attack.t1548
    - attack.t1556
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Delete 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#conditional-access