To continue our look at malware we can't forget Trojan viruses. The story of the Trojan horse is common knowledge. Just like the worm and the virus, we see this malware is taking it's cues from real like as well.
A Trojan Virus embodies the characteristics of its two names. It's a virus so yes it must be spread by human hand. The other term is Trojan. This refers to the Trojan horse used to infiltrate a city. This virus also takes on the aspects of the Trojan horse. On the surface it's a harmless software but when you download it, it delivers it's malicious payload.