IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
« Microsoft 365 Potential ransomware activity Microsoft 365 Teams External Access Enabled »
Elastic Docs ›Elastic Security Solution [8.16] ›Detections and alerts ›Prebuilt rule reference

Microsoft 365 Teams Custom Application Interaction Allowed

edit

Microsoft 365 Teams Custom Application Interaction Allowed

edit

Identifies when custom applications are allowed in Microsoft Teams. If an organization requires applications other than those available in the Teams app store, custom applications can be developed as packages and uploaded. An adversary may abuse this behavior to establish persistence in an environment.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-o365*

Severity: medium

Risk score: 47

Runs every: 5m

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

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Cloud
  • Data Source: Microsoft 365
  • Use Case: Configuration Audit
  • Tactic: Persistence

Version: 207

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

edit

Setup

edit

The Office 365 Logs Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

Rule query

edit
event.dataset:o365.audit and event.provider:MicrosoftTeams and
event.category:web and event.action:TeamsTenantSettingChanged and
o365.audit.Name:"Allow sideloading and interaction of custom apps" and
o365.audit.NewValue:True and event.outcome:success

Framework: MITRE ATT&CKTM

« Microsoft 365 Potential ransomware activity Microsoft 365 Teams External Access Enabled »