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New or Modified Federation Domainedit
Identifies 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: 101 (version history)
Added (Elastic Stack release): 7.16.0
Last modified (Elastic Stack release): 8.6.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Investigation guideedit
Rule queryedit
event.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 mappingedit
Framework: 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/
Rule version historyedit
- Version 101 (8.6.0 release)
-
- Formatting only
- Version 100 (8.5.0 release)
-
- Formatting only
- Version 4 (8.4.0 release)
-
-
Updated query, changed from:
event.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
-
- Version 2 (8.1.0 release)
-
- Formatting only