The middlemen of cyber espionage.

Lumen Black Lotus Labs describes a China-nexus "quartermaster" infrastructure provider that supplies reconnaissance, proxy routing, and traffic-obfuscation services (including tools called QScan and Fast Labyrinth) to Chinese cyber espionage actors. The shared infrastructure enables targeting and concealment for operations against government, military, research, and critical infrastructure networks, undermining traditional IP-based defenses; researchers recommend following CISA/NCSC guidance and hardening/updating external-facing devices.