Volt Typhoon Used Covert Silent Train Network in Four Zero-Day Exploitation Campaigns
Oct 28, 2026
Cyber Espionage / Vulnerability
The China-nexus cyber espionage group known as Volt Typhoon has been attributed to a now-disrupted covert access network dubbed Silent Train that has been put to use for zero-day exploitation and strategic access. "First identified in late 2023, Silent Train uses rotating chains of compromised SOHO, IoT, and enterprise infrastructure," Lumen Technologies Black Lotus Labs said in a report shared with The Hacker News. "It employs anti-forensic techniques, compartmentalized operations, and post-operation cleanup to minimize detection and attribution." Its main purpose is to facilitate critical attack phases like vulnerability exploitation, credential access, data exfiltration, and to maintain continued access to victim environments. The activity stands out for two main reasons - It singled out entities that could provide scalable access to downstream customers, sensitive networks, or strategic programs. It targeted endpoint management platforms, network...