COMPUTER VIRUSES. “None of these characteristics came from the viruses themselves. Rather, each change and addition to the virus behavior has been wrought by an outside agency: the programmer.” (Reference to camouflage, territorial behavior, predatory behavior, and speciation in computer viruses).
https://books.google.com/books?id=qErpoKjc1h4C&pg=PA261&lpg=PA261&dq=computer+virus+metabolism&source=bl&ots=NWmF_p3xqj&sig=XEfXy2VQZdbYQgBJSndUVHbkDSI&hl=en&sa=X&ved=0ahUKEwi51qLC35fLAhUBcj4KHQW-B9AQ6AEIFzAE