China Denies Responsibility For Microsoft Hack, Accuses CIA Of Cyber Theft

China denied charges Tuesday that it was responsible for a March hack on the Microsoft Exchange email system, instead accusing the Central Intelligence Agency (CIA) of launching cyber attacks on Chinese infrastructure.

Chinese Foreign Ministry spokesman Zhao Lijian told reporters in a press conference Tuesday that U.S. allegations the country had sponsored cyber attacks around the world were “unreasonable.” The U.S. and its allies had accused China on Monday of contracting hackers to carry out cyber attacks, including a March hack on the Microsoft Exchange email service.

“When it comes to correlating cyber attacks with a country’s government, you should be more cautious,” Zhao told reporters. “The so-called technical details released by the US cannot constitute a complete chain of evidence.”

The Biden administration accused China’s Ministry of State Security of sponsoring “an intelligence enterprise that includes contract hackers who also conduct unsanctioned cyber operations worldwide” such as ransomware attacks. The Department of Justice announced criminal charges Monday against Chinese nationals involved in the hacks.

China denied the charges, instead alleging the U.S. was responsible for a number of cyber attacks on Chinese infrastructure.

“In fact, the United States is the world’s largest source of cyber attacks,” Zhao told reporters, adding that “the U.S. Central Intelligence Agency has conducted cyber attacks on key areas such as China’s aerospace, scientific research institutions, oil industry, large Internet companies, and government agencies for 11 years.”

Zhao also argued the U.S. was preventing international cooperation on threats to cyber security by attempting to prosecute Chinese nationals.

“China once again strongly urges the United States and its allies to stop cyber thefts and attacks against China, stop pouring dirty water on China on cyber security issues, and withdraw the so-called prosecution,” Zhao said.