Microsoft Teams Vishing Attacks Lead to Chaos Ransomware Deployment

Threat actors are impersonating IT support staff in Microsoft Teams calls to gain remote access to corporate devices and deploy Chaos ransomware. These attacks specifically target organizations in North America. The attackers use vishing (voice phishing) techniques via Teams to trick employees into granting access. Once inside, they deploy Chaos ransomware, which encrypts files and disrupts operations. No specific dates, CVE IDs, or technical details about the ransomware deployment method were provided in the report.