Summary of news on 'Gaming ransomware gang shuts down'. Source: BBC. The gang who made the notorious Teslacrypt ransomware virus has shut up shop and released the master key it used to scramble data. It is not yet clear why the gang behind Teslacrypt decided to stop using their malware. In the body of the short message was the master encryption key used to scramble files on infected machines. Mr Ducklin speculated about why the hackers had decided to stop sending out their ransomware. Perhaps, he said, the gang had been hacked by rivals who released the key to ruin the business of a competitor..