Hackers bury inboxes in spam then show up on Microsoft Teams posing as IT support

Threat actors are flooding employees’ inboxes with spam and then contacting them on Microsoft Teams as IT support, offering to fix the problem they created, Arctic Wolf has found. The security company documented more than 400 incidents in which the external chat feature in Teams was abused. In many of these cases, the fake help desk message arrived minutes after the victim’s inbox had been filled with hundreds of newsletter and subscription confirmations.