
Microsoft Teams Call Weaponized to Deploy & Execute Matanbuchus Ransomware
A sophisticated cyberattack campaign came to light in July 2025, that weaponizes Microsoft Teams calls to deploy the latest iteration of Matanbuchus ransomware. The attack begins with adversaries impersonating IT helpdesk personnel through external Teams calls, leveraging tactics related to social engineering to convince employees to execute malicious scripts. In ongoing support sessions, attackers activate…