Salt Typhoon is perhaps best known as the group who infiltrated the networks of nine major US telecommunications companies and internet providers, including Verizon and AT&T in the largest telecoms hack in US history.

The U.S. Treasury Department's Office of Foreign Assets Control (OFAC) has imposed sanctions against a Chinese cybersecurity company and a Shanghai-based cyber actor for their alleged links to the Salt Typhoon group and the recent compromise of the federal agency.

The U.S. federal government's first hint that Chinese hackers penetrated American telecommunications infrastructure came from telemetry on government networks, said

The State and Treasury Departments say Chinese cybersecurity vendor Sichuan Juxinhe is behind the hacks into numerous US telecommunications companies.