A recent slew of related ransomware attacks on top videogame companies has been associated with the notorious Chinese-linked APT27 threat group. The group has historically leveraged publicly available tools to access networks with an aim of collecting political and military intelligence. Researchers noticed the strong links to APT 27 when they were brought in as part of incident response for ransomware activity that affected several major gaming companies globally last year. Two of the affected companies are among the largest in the world, they said; details of these incidents are scant.
Source: https://threatpost.com/ransomware-major-gaming-companies-apt27/162735/