The FBI has disrupted a group of hackers working at the direction of the Chinese government who targeted universities, government agencies and other organizations, Director Chris Wray said Wednesday.

The hacking campaign known as Flax Typhoon installed malicious software on more than 200,000 consumer devices, including cameras, video recorders and home and office routers, to create a massive botnet — a network of infected computers. The botnet was used to facilitate cyber crimes, such as the theft of sensitive information from victims’ networks.

“Flax Typhoon’s actions caused real harm to its victims, who had to devote precious time to clean up the mess when they discovered the malware,” Wray said at the Aspen Cyber Summit.