Microsoft: Teams increasingly abused in helpdesk impersonation attacks
Summary
Microsoft is observing a rise in threat actors exploiting external Microsoft Teams collaborations for malicious purposes. Attackers are leveraging legitimate tools to gain initial access and move laterally within enterprise networks, often impersonating helpdesk personnel to trick users into granting access.
IFF Assessment
This is bad news for defenders as it highlights a growing attack vector that utilizes legitimate collaboration tools and social engineering tactics to compromise enterprise networks.
Defender Context
Defenders should be vigilant about suspicious requests originating from external Teams users, especially those asking for credentials or access under the guise of IT support. Implementing stricter access controls for external collaborations and enhancing user awareness training on helpdesk impersonation tactics are crucial.