The Chinese Volt Typhoon cyber-espionage group infiltrated a critical infrastructure network in the United States and remained undetected for at least five years before being discovered, according to a joint advisory from CISA, the NSA, the FBI, and partner Five Eyes agencies. […]
from https://www.bleepingcomputer.com/news/security/chinese-hackers-hid-in-us-infrastructure-network-for-5-years/