It depends. A virus, by definition, replicates itself. But a trojan horse acts as a beneficial program but actually does something harmful (or both, as KaZaA did). Some trojan horses send themselves to others, but they usually rely on people being drawn to it's free features to download it.
Trojan Horse
A worm can replicate itself.
A program that appears legitamite but preforms some illicit activity when it is run. It does not replicate itself.
A Trojan Horse.
'you need a Trojan horse to create a Trojan virus' LOL , Trojan Horse itself is a Virus !
A Trojan horse isn’t a virus, but it’s a type of malware. Unlike viruses, Trojans don’t replicate themselves. Instead, they disguise as legitimate software to trick users into installing them, giving attackers access to systems or data.
Attach to emails files programmes etc
A Trojan horse propagates itself via network connections. Boot sector via files copied from disk to disk.
The romance of the "Trojan Horse." As years roll by, historians it seems, question the actual existence of the Trojan War, as they do the city of Troy itself.
A Trojan horse propagates itself via network connections. Boot sector via files copied from disk to disk.
Trojan horse
yes there was a Trojan Horse.