Is there a lawyer to help me answer? Is it illegal to sell computer viruses?

I don't think so, because it is prohibited and illegal by national laws, so it is not protected by law and is suspected of destroying computer information systems. This crime refers to acts that violate state regulations, destroy the functions of computer information systems or the data and applications stored, processed and transmitted in computer information systems, or deliberately produce and spread destructive programs such as computer viruses, which affect the normal operation of computer systems and cause serious consequences. So don't sell.