Too Many Global Admins — Sigma Rule

Rule metadata and linked tags

Author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'. Source status: test; severity: high. Source dates: 2023-09-14 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 21b906651b962a1cb6b11aaa1abe1ceea340bcd080982866911772e017e4a715

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: Too Many Global Admins
id: 7bbc309f-e2b1-4eb1-8369-131a367d67d3
status: test
description: Identifies an event where there are there are too many accounts assigned the Global Administrator role.
references:
    - https://learn.microsoft.com/en-us/entra/id-governance/privileged-identity-management/pim-how-to-configure-security-alerts#there-are-too-many-global-administrators
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-14
tags:
    - attack.initial-access
    - attack.stealth
    - attack.t1078
    - attack.persistence
    - attack.privilege-escalation
logsource:
    product: azure
    service: pim
detection:
    selection:
        riskEventType: 'tooManyGlobalAdminsAssignedToTenantAlertIncident'
    condition: selection
falsepositives:
    - Investigate if threshold setting in PIM is too low.
level: high

Original YAML and metadata in JSON

False positives

• Investigate if threshold setting in PIM is too low.

Source references

• https://learn.microsoft.com/en-us/entra/id-governance/privileged-identity-management/pim-how-to-configure-security-alerts#there-are-too-many-global-administrators