Unknown Malware

Attackers Use Microsoft Teams IT Support Scams to Deploy Malware and Ransomware

Security researchers have identified a recurring social engineering pattern in which threat actors leverage Microsoft Teams' external chat creation feature to conduct impersonation scams and deliver malware or ransomware. The attacks involve the use of throwaway tenants and fake IT support identities to appear legitimate, targeting Microsoft Teams users globally. While the exact number of cases and specific threat actor groups remain unconfirmed, hundreds of incidents have been documented.