Do you know how harmful the PayCrypt is? It is one of the most dangerous virus, the result infected by it will be really miserable for you. And it is obvious to speculate that its harms will be related to the extension. In fact, this is a ransomware which is new recently and it earns its name by its super perniciousness. If users have infected with this virus, it is better for them to remove it. Otherwise, everything will go in a wrong way from then on.
Like any other ransomware, PayCrypt can encrypt the files of your PC, both windows and mac. How is this related to the extension? Actually it will add a strange extensions after the normal one, such as .ccc, .vvv, .locky, .micro, and so on, and it is a sign for you to find out these files are harmed by ransomware. Users will never know how to open these files and it is also impossible to open it without a key.