PANews reported on May 19 that according to Blue Dot Network, the official drivers provided by Procolored, a Shenzhen printer company in China, were found to carry backdoor programs to steal cryptocurrency. Data showed that hackers stole 9.3 bitcoins. The reason for the infection was that Procolored used a USB flash drive to transfer these drivers, and after being infected with the backdoor program, Procolored uploaded it to a network disk for global users to download.