Attackers are leveraging Microsoft Teams vishing (voice phishing) calls to establish initial contact, followed by deploying custom malware and remote access tools to facilitate ransomware deployment. The article describes a social engineering attack chain, not a specific software vulnerability, so CVSS scores, affected versions, fixed versions, and technical workarounds are not provided. IT professionals should focus on user awareness training against social engineering and implement robust endpoint detection and response (EDR) controls to mitigate this threat.