Sunturai
Back to results
MediumMicrosoft Sentinel analytics

New onmicrosoft domain added to tenant

This detection looks for new onmicrosoft domains being added to a tenant. An attacker who compromises a tenant may register a new onmicrosoft domain in order to masquerade as a service provider for launching phishing…

Description

This detection looks for new onmicrosoft domains being added to a tenant. An attacker who compromises a tenant may register a new onmicrosoft domain in order to masquerade as a service provider for launching phishing campaigns. Domain additions are not a common occurrence and users should validate that the domain was added by a legitimate user, with a legitimate purpose.

Detection logic

Detection requirements

Platform
PRE

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source product
azureactivedirectory
Log source service
auditlogs

Detections can measure how the public catalogue is used — which detections people look for, and which pages bring them here. It sets a cookie that recognises this browser for 180 days. It is never linked to an account and never follows you to other sites. Privacy notice