Over the past two weeks security researchers have seen a surge in attacks using a file-encrypting ransomware program called TeslaCrypt, known for targeting gamers in the past.

TeslaCrypt first appeared in March and stood out because over 50 of the 185 file types it targeted were associated with computer games and related software, including game saves, custom maps, profiles, replays and mods — content that users might have a hard time replacing.

In April researchers from Cisco found a weakness in TeslaCrypt’s encryption routine and created a tool that could decrypt files affected by some versions of the program.

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