Trojan a network security threat | networksecurityinindia

Trojans are programs that breach the port on your machine permits the designer of Trojan to get into your machine via the network or by opening a backdoor.

Trojan horse is used for

Stealing passwords Copying confidential data Performing any unauthorized action.

A Trojan horse is not essentially a virus, since its purpose is not to reproduce the infection in any machine it just breaches your network security. Detecting programs like these are really difficult. But you need to have good network security for getting rid of this.