The Chinese Shenzhen printer company Tian Sheng (#Procolored) was found to provide official drivers that carry backdoor programs used to steal cryptocurrency, with data showing that hackers stole a total of 9.3 bitcoins.

As for the infection cause, Tian Sheng used USB drives to transfer these drivers, and after being infected with the backdoor program, Tian Sheng uploaded them to a cloud drive for global users to download.