Microsoft Teams: Phishing Detection in Teams Messaging

🚨 The Signal: Microsoft Teams now uses AI to detect phishing and social engineering in external chats, particularly first-contact messages. This enhances protection against malicious links and credential theft, displaying warnings to users when suspicious activity is identified.

The Impact

All Teams users are affected, reducing their risk of falling victim to phishing and social engineering attacks.

• End Users: Reduced risk from external phishing attempts.
• Security Teams: Improved detection of social engineering in Teams.
• Admins: Fewer successful phishing incidents to remediate.
• Organisations: Enhanced overall security posture against targeted attacks.

The Action

1. Review Microsoft Teams security policies for external communication settings.
2. Educate users on recognising phishing warnings within Teams.
3. Monitor Teams security reports for detected phishing attempts.
4. Ensure Microsoft Defender for Office 365 is configured for comprehensive protection.

Domain: Defender · Impact: medium · Workload: Teams · Essential Eight: User Application Hardening · ISM: ISM-1412, ISM-1485, ISM-1486, ISM-1542, ISM-1585, ISM-1667, ISM-1668, ISM-1669, ISM-1670, ISM-1823, ISM-1824, ISM-1859, ISM-1860