- Engineer — Plan: Audit and tighten Microsoft Teams external access policies to block or restrict unsolicited external chat from unknown tenants; review which remote-access tools are permitted and ensure Node.js execution from user-writable paths is monitored or blocked.
- SOC/IR — Act: Active human-operated campaign with clear TTPs: external Teams chat impersonating IT support → remote session → Node.js implant → lateral movement via living-off-the-land tools. Hunt for Node.js spawning unusual child processes, remote-access tool sessions initiated from external Teams contacts, and abnormal lateral movement patterns since early September 2026; tune EDR rules on Teams-initiated process chains.
- Leader — Plan: This campaign exploits enterprise collaboration tools (Teams) rather than unpatched software, meaning technical controls alone are insufficient — review whether external Teams federation policies are hardened and ensure current security-awareness training explicitly covers IT-support impersonation via chat platforms.