Fake IT Calls Target Executives in Microsoft 365 Data Theft and Extortion Attacks

Threat hunters have disclosed details of a widespread data theft and extortion threat cluster that's targeting Microsoft 365 and other software-as-a-service (SaaS) offerings through information technology (IT) help desk vishing, adversary-in-the-middle (AitM) token theft, and residential-proxy sign-ins.

The activity, which mainly singles out directors, vice presidents, and other executive staff