US court filing via CourtListener RECAP: United States v. Hyok
Ransomware and extortion of a victim company · On August 24, 2017
Overt Act No. 15: On August 24, 2017, having gained unauthorized access to a computer system of a victim company at an earlier date, the hackers deployed ransomware on the computer system and then extorted payments totaling approximately $100,000 in cryptocurrency from the victim. [Case No. 2:20-cr-00614, U.S. District Court for the Central District of California; filing: SEALED INDICTMENT filed as to Jon Chang Hyok]