Microsoft Entra ID Illicit Consent Grant via Registered Application

Last updated 5 months ago on 2025-03-24

Created 5 years ago on 2020-09-01

About

Identifies an illicit consent grant request on-behalf-of a registered Entra ID application. Adversaries may create and register an application in Microsoft Entra ID for the purpose of requesting user consent to access resources. This is accomplished by tricking a user into granting consent to the application, typically via a pre-made phishing URL. This establishes an OAuth grant that allows the malicious client applocation to access resources on-behalf-of the user.

Tags

Domain: CloudData Source: AzureData Source: Microsoft Entra IDData Source: Microsoft Entra ID Audit LogsUse Case: Identity and Access AuditTactic: Initial AccessTactic: Credential AccessLanguage: kuery

Severity

medium

Risk Score

MITRE ATT&CK™

Initial Access (TA0001)(opens in a new tab or window)

↳ Phishing (T1566)(opens in a new tab or window)

Credential Access (TA0006)(opens in a new tab or window)

↳ Steal Application Access Token (T1528)(opens in a new tab or window)

License

Elastic License v2(opens in a new tab or window)

Definition

Rule Type: New Terms Rule
Integration Pack: Prebuilt Security Detection Rules
Index Patterns: filebeat-*logs-azure*
Related Integrations: azure(opens in a new tab or window)
Query

event.dataset: "azure.auditlogs" and
  (
    azure.auditlogs.operation_name:"Consent to application"
    or event.action:"Consent to application"
  )
  and event.outcome: "success"
  and azure.auditlogs.properties.additional_details.key: "AppId"

Install detection rules in Elastic Security

Detect Microsoft Entra ID Illicit Consent Grant via Registered Application in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).