The U.S. has sanctioned Sichuan Silence, a Chinese cybersecurity firm involved in ransomware attacks targeting critical infrastructure in 2020. One of its employees, Guan Tianfeng, has also been charged individually.

The United States sanctioned a Chinese cybersecurity company over an ambitious cyberattack that U.S. Treasury officials say could have killed people.

Some firewalls targeted in the US were protecting critical infrastructure companies, the US Treasury Department says.

Guan Tianfeng represented his employer, a state contractor, in hacking competitions, which analysts fear strengthen China's cyberattack capabilities.

Sichuan Silence and one of its employees allegedly exploited a zero-day attack to spread malware to firewall devices, including 23,000 based in the US.

The US sanctioned a Chinese company it accused of working for intelligence agencies and charged one of its employees with hacking into the computer systems of thousands of businesses across the globe,