Analytics BIOC Informational
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User installed an application in Microsoft Teams via Graph API

A user who rarely uses the Graph API to install Microsoft Teams applications has installed one using it.

Module:
Identity Threat Detection (ITDR), SaaS Threat Detection
Licensed by:
Identity Threat Detection (ITDR)
Data source:
Microsoft Graph Logs
ATT&CK tactics: Persistence (TA0003)
ATT&CK techniques: Cloud Application Integration (T1671)
Detector tags: Microsoft Teams
Attacker's goals:

Attackers may leverage Teams applications to maintain persistent access to compromised Teams accounts.

Investigative actions:

Verify the user's role and typical usage of Microsoft Graph API. Check if the user's account has recently logged in from unusual locations or devices. Review recent email and chat activity to identify any phishing or suspicious messages sent. Examine the Graph API call logs to see what actions were performed and their timestamps. Correlate with endpoint logs to detect any malware or suspicious processes running on the user's device. Check for signs of account compromise, such as password changes or MFA bypass attempts. Follow further actions done by the account.

Test period:
N/A (single event)
Deduplication:
1 Day
1 variation:
  • User installed an application in Microsoft Teams via Graph API from a first seen ASN Low (parent: Informational)