Microsoft Teams vishing attacks lead to Chaos ransomware attacks
Cyberattackers are using Microsoft Teams calls to gain access to corporate devices, deploying Chaos ransomware in a campaign targeting North American organizations. The attacks, tracked by cybersecurity firm Sophos as STAC4749, began in February 2026 and have resulted in at least three intrusions leading to the deployment of Chaos ransomware. The attackers are impersonating IT … Read more