LoFP / an anti-phishing rule 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.

Techniques

• T1566

Sample rules

Microsoft 365 Exchange Anti-Phish Rule Modification

• source: elastic
• technicques:
  • T1566

Description

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

Detection logic

event.dataset:o365.audit and event.provider:Exchange and event.category:web and event.action:("Remove-AntiPhishRule" or "Disable-AntiPhishRule") and event.outcome:success