IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
Elastic Docs ›Elastic Security Solution [7.11] ›Detections and Alerts ›Prebuilt rule reference
« Microsoft 365 Exchange Malware Filter Rule Modification Microsoft 365 Exchange Safe Attachment Rule Disabled »

Microsoft 365 Exchange Management Group Role Assignmentedit

Identifies when a new role is assigned to a management group in Microsoft 365. An adversary may attempt to add a role in order to maintain persistence in an environment.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-o365*

Severity: medium

Risk score: 47

Runs every: 5 minutes

Searches indices from: now-30m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Cloud
  • Microsoft 365
  • Continuous Monitoring
  • SecOps
  • Identity and Access

Version: 2 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 7.11.2

Rule authors: Elastic

Rule license: Elastic License

Potential false positivesedit

A new role may be assigned to a management group by a system or network administrator. Verify that the configuration change was expected. Exceptions can be added to this rule to filter expected behavior.

Investigation guideedit

The Microsoft 365 Fleet integration or Filebeat module must be enabled to use this rule.

Rule queryedit

event.dataset:o365.audit and event.provider:Exchange and
event.category:web and event.action:"New-ManagementRoleAssignment" and
event.outcome:success

Threat mappingedit

Framework: MITRE ATT&CKTM

Rule version historyedit

Version 2 (7.11.2 release)
  • Formatting only
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