UNC6692, a newly identified threat actor, is conducting targeted intrusion campaigns that abuse Microsoft Teams cross-tenant messaging to deliver malware and leverage AWS S3 buckets for command-and-control infrastructure. Enterprises using both platforms are at risk of initial compromise through social engineering attacks that exploit the inherent trust employees place in internal communication tools. The business risk includes unauthorized network access, data exfiltration, and potential lateral movement, compounded by detection difficulty due to malicious traffic blending with legitimate cloud services.