A North Korean entity under its Workers’ Party has made thousands of illegal online gambling websites and sold them to a South Korean cyber crime ring for hefty profits, the spy agency here said Wednesday.

Gyonghung Information Technology, a 15-member group based in Dandong, a Chinese border town neighboring the North’s Sinuiju, has allegedly received $5,000 from the unidentified South Korean criminal organization for creating a single website and $3,000 per month for maintaining the website, according to the National Intelligence Service (NIS).

It was also suspected of receiving an additional $2,000 to $5,000 if the website gathers a lot of users through bank accounts held by Chinese nationals and global online payment service PayPal.