The Treasury Department has announced sanctions in connection with a massive Chinese hack of American telecommunications companies and a breach of its own computer network.

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 US sanctioned Yin Kecheng, linked to China’s MSS, for hacking the Treasury Department, and Sichuan Juxinhe Network Technology Co., tied to Salt Typhoon, for targeting US telecoms and politicians like Donald Trump and Kamala Harris.

The Biden administration on Friday announced sanctions on two Chinese entities accused of cyberattacks, including a firm it said is directly involved in the recent espionage campaign against US telecommunications firms and a hacker behind the recent breach of Treasury Department computers.

U.S. Treasury Secretary Janet Yellen's computer was hacked and unclassified files were accessed as part of a broader breach of the Treasury Department by Chinese state-sponsored hackers, Bloomberg News reported on Thursday,

A cyberattack on the US Treasury Department by Chinese state-backed hackers compromised computers of senior officials, including Janet Yellen. The breach, stemming from a third-party provider vulnerability,