China slammed the U.S. Monday for sanctioning a Beijing-based cybersecurity firm allegedly behind a botnet targeting American infrastructure, accusing Washington of “using the issue of cybersecurity to vilify and smear China.

China has slammed a decision by the U.S. Treasury to sanction a Beijing-based cybersecurity company for its alleged role in multiple hacking incidents targeting critical U.S. infrastructure, while the Chinese cyber security agency complained Monday of attacks on Chinese networks.