South Korea’s highest court upheld the one-year prison sentence of a man who hired a North Korean cybercriminal to carry out attacks in support of an illegal gaming server.

The Supreme Court’s First Division on Thursday delivered the judgement against the South Korean national, identified solely by his surname Oh, for violating the National Security Act through his interactions with an unnamed DPRK operative, a court spokesperson told NK News.

Oh was previously convictedof operating an illegal private server for the online multiplayer game “Lineage” and paying over $16,000 (23.8 million Korean won) to the North Korean cybercriminal