Sigma rule: New Federated Domain Added - Exchange
A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-4013bcfa4ae0, updated 2022-02-08T00:00:00.000Z.
Rule
- Title
- New Federated Domain Added - Exchange
- Status
- test
- Level
- medium
- Author
- Splunk Threat Research Team (original rule), '@ionsor (rule)'
- Date
- 2022-02-08
- File
- rules/cloud/m365/exchange/microsoft365_new_federated_domain_added_exchange.yml
- Commit
- ccbb0369507f796db0b0ae6854c8a2be471b9d84
Detects the addition of a new Federated Domain.
Log source
- product
- m365
- service
- exchange
Detection
selection:
eventSource: Exchange
eventName: 'Add-FederatedDomain'
status: success
condition: selectionFalse positives (as the rule lists them)
- 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.
Tags
- attack.persistence
- attack.t1136.003
MITRE ATT&CK ids this rule names
Related rules
References
- https://www.fireeye.com/content/dam/fireeye-www/blog/pdfs/wp-m-unc2452-2021-000343-01.pdf
- https://us-cert.cisa.gov/ncas/alerts/aa21-008a
- https://www.splunk.com/en_us/blog/security/a-golden-saml-journey-solarwinds-continued.html
- https://www.sygnia.co/golden-saml-advisory
- https://o365blog.com/post/aadbackdoor/
Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/m365/exchange/microsoft365_new_federated_domain_added_exchange.yml
Sources and licences
SigmaHQ
"New Federated Domain Added - Exchange" by Splunk Threat Research Team (original rule), '@ionsor (rule)' (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/m365/exchange/microsoft365_new_federated_domain_added_exchange.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Cite this page
Dragons Eye Ransomware Tracker, "Sigma rule: New Federated Domain Added - Exchange",
entity page, dataset version ref-4013bcfa4ae0, updated 2022-02-08T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/42127bdd-9133-474f-a6f1-97b6c08a4339 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 42127bdd-9133-474f-a6f1-97b6c08a4339, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.