Elastic medium stable kql

M365 Exchange Anti-Phish Policy Deleted

Identifies the deletion of an anti-phishing policy in Microsoft 365. By default, Microsoft 365 includes built-in features that help protect users from phishing attacks. Anti-phishing polices increase this protection by refining settings to better detect and prevent attacks.

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Detection Logic

data_stream.dataset:o365.audit and event.provider:Exchange and event.category:web and event.action:"Remove-AntiPhishPolicy" and event.outcome:success

False Positives

  • ⚠ An anti-phishing policy may be deleted by a system or network administrator. Verify that the configuration change was expected. Exceptions can be added to this rule to filter expected behavior.

Field Validations

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