Facebook revealed on Thursday that it had blocked Chinese hackers from using its platform to target Uighur activists living abroad. The tech giant said two hacking syndicates in China, Earth Empusa and Evil Eye, were responsible for the attacks and exploited various means to distribute malware onto their devices and carry out surveillance. Facebook said Uighur journalists, activists, and dissidents living across the United States, Australia, Canada, Syria, Turkey, and Kazakhstan. “This activity had the hallmarks of a well-resourced and persistent operation while obfuscating who’s behind it,” Mike Dvilyanski, Facebook’s head of cyber espionage investigations, and Nathaniel Gleicher, head of security policy, wrote in a statement. “On our platform, this cyber-espionage campaign manifested primarily in sending links to malicious websites rather than direct sharing of the malware itself,” they added. “We shared our findings and threat indicators with industry peers so they too can detect and stop this activity.” One …