Elastic Security Detection Rules

Microsoft 365 Exchange Anti-Phish Rule Modification

Last updated 7 months ago on 2025-01-15
Created 5 years ago on 2020-11-19

About

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.
Tags
Domain: CloudData Source: Microsoft 365Use Case: Configuration AuditTactic: Initial AccessLanguage: kuery
Severity
medium
Risk Score
47
MITRE ATT&CK™

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

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

False Positive Examples
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.
License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
filebeat-*logs-o365*
Related Integrations

o365(opens in a new tab or window)

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

Install detection rules in Elastic Security

Detect Microsoft 365 Exchange Anti-Phish Rule Modification 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).