A Trojan Horse. Trojan Horse programs disguise themselves as legitimate programs and then infect your computer when you download them unwittingly, expecting to get a cool new PC game or such. They run malicious processes in the backround without you knowing and generally open up a backdoor or trapdoor to the internet to download more viruses on your computer without your permission. Usually you can find Trojans by looking on Task Manager. You may find names of programs you don't know or have weird names. Be careful when taskkilling programs, one may end up being useful.
Do you mean the actual name of a virus or the classification of it? Well, for the latter, a virus that conceals itself or appears to be a legitimate program is called a Trojan.
Trojan
Trojan horse
These are Trojans, i.e. programs that pretend being legitimate programs, but in fact are malicious. It is not a single program, but category of programs.
there are too many to name but that is the most comman virus sorry if that doesnt help
Trojans are pieces of malware that are downloaded by the user because they believe it is a useful program, but cause harm instead.
The name it's given is called a Trojan virus taken from the Trojan war with worriors inside a giant wooden horse that was a given as a gift.
The name of the program that is offering a free Trojan virus remover is Trojan Virus. One can download a free trial from their website which is 'trojan-remover'.
virus
Virus is short for Vital Information Resources under Seize. It is a man made program that is harmful to a computer.
The Friday the 13th virus.
A virus