Volt Typhoon uses 'Silent Train' relay framework with zero-day exploits, researchers say
Black Lotus Labs tracks suspected Chinese state hackers rotating disposable compromised devices to hide attacks on high-value targets
Chinese state-sponsored hacking group Volt Typhoon has been using a framework dubbed Silent Train, which rotates chains of compromised devices to hide attacks that have exploited at least four zero-day vulnerabilities against high-value targets, according to researchers at Black Lotus Labs, the threat research division of communications company Lumen.