IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
New or Modified Federation Domain
editNew or Modified Federation Domain
editIdentifies a new or modified federation domain, which can be used to create a trust between O365 and an external identity provider.
Rule type: query
Rule indices:
- filebeat-*
- logs-o365*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
- https://docs.microsoft.com/en-us/powershell/module/exchange/remove-accepteddomain?view=exchange-ps
- https://docs.microsoft.com/en-us/powershell/module/exchange/remove-federateddomain?view=exchange-ps
- https://docs.microsoft.com/en-us/powershell/module/exchange/new-accepteddomain?view=exchange-ps
- https://docs.microsoft.com/en-us/powershell/module/exchange/add-federateddomain?view=exchange-ps
- https://docs.microsoft.com/en-us/powershell/module/exchange/set-accepteddomain?view=exchange-ps
- https://docs.microsoft.com/en-us/powershell/module/msonline/set-msoldomainfederationsettings?view=azureadps-1.0
Tags:
- Elastic
- Cloud
- Microsoft 365
- Continuous Monitoring
- SecOps
- Identity and Access
Version: 1
Added (Elastic Stack release): 7.16.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Investigation guide
edit## Config The Microsoft 365 Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
Rule query
editevent.dataset:o365.audit and event.provider:Exchange and
event.category:web and event.action:("Set-AcceptedDomain" or "Set-
MsolDomainFederationSettings" or "Add-FederatedDomain" or "New-
AcceptedDomain" or "Remove-AcceptedDomain" or "Remove-
FederatedDomain") and event.outcome:success
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Domain Policy Modification
- ID: T1484
- Reference URL: https://attack.mitre.org/techniques/T1484/