Microsoft Teams enumeration activity

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	10 Minutes
Deduplication Period	5 Days
Required Data	Requires one of the following data sources: Azure Audit Log OR Microsoft Graph Logs
Detection Modules	Cloud
Detector Tags	Microsoft Graph Activity Logs, Microsoft Teams
ATT&CK Tactic	Discovery (TA0007)
ATT&CK Technique	Cloud Service Discovery (T1526)
Severity	Informational

Description

The Microsoft Graph API was used to enumerate Microsoft Teams channels in an Azure tenant.

Attacker's Goals

To extract sensitive information stored in Microsoft Teams.

Investigative actions

• Determine which Teams channels were enumerated and whether they contained any sensitive information.
• Investigate the identity following actions.