The compliance team is currently in the process of hardening the Microsoft 365 environment. One of their primary goals is to restrict the ability of users to grant consent to risky applications. A step in this process requires an audit of existing applications and permissions. While reviewing the results, they noted an unusual application named Microsoft Activation App. This discovery prompted a notification to the SOC.
After initial investigation, the SOC identified a possible phishing attempt in Exchange logs just prior to the granting of permissions to Microsoft Activation App. They based this assessment on the subject of the message: [URGENT] Microsoft Activation Code. Your task is to determine if, and to what extent, the Microsoft 365 environment is compromised.
The events in your SIEM can be found in the following timespan: 20 November 2023 - 22 November 2023.
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