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MediumSigmaHQSplunk Threat Research Team (original rule) +1

New Federated Domain Added - Exchange

Detects the addition of a new Federated Domain.

Detection logic

Detection requirements

Platform
IaaSIdentity ProviderOffice SuiteSaaS

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

Log source product
m365
Log source service
exchange

Known benign triggers

  • The creation of a new Federated domain is not necessarily malicious, however these events need to be followed closely, as it may indicate federated credential abuse or backdoor via federated identities at a similar or different cloud provider.

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