The South Korean government announced unilateral sanctions on Friday against four North Korean individuals and seven entities that raise funds for the country’s nuclear and missile programs, Seoul’s first-ever independent sanctions targeting DPRK cyber activities.

Among the newly blacklisted North Koreans is Park Jin Hyok, a hacker operating under the Chosun Expo Joint Venture. The U.S. previously blacklisted Park for his involvement in attacks including the 2014 Sony Pictures hacking and the 2017 WannaCry ransomware attack, according to a foreign ministry press release.