Trojan Horse

Description

A Trojan horse is a program that uses malicious code masqueraded as a benign application. The term derives from the myth of the Greek Trojan Horse on the Trojan War. The malicious code can be injected on legitimate software to be installed by victim, or the supposed benign program itself can be the Trojan horse. The victim is usually tricked to open the Trojan horse because it appears to be received from a legitimate source. This kind of malware looks and acts like a virus, but the difference resides on the fact that Trojan horse does not self-replicate. The infected computer experience many different symptoms similar to virus, as background configuration auto changing, mouse buttons function reversing, system crashes, the famous blue screen, computer reboots itself, Ctrl + Alt + Del stops working, and many other symptoms described later in this document. The ultimate Trojan horse uses javascript to make furtive attack, free of antimalware intervention and users interception, normally used on attacks against internet banking transactions on-the-fly, resulting victim´s financial loss.

Other details can be found on Man-in-the-browser attack.

The 7 main types of Trojan Horse

1.Remote Access Trojan (RAT)

Designed to provide the attacker full control of the infected machine. Trojan horse usually masqueraded as a utility.

2.Data Sending Trojan

Trojan horse that uses keylogger technology to capture sensitive data like passwords, credit card and banking information, IM messages, and send back to attacker.

3.Destructive Trojan

Trojan horse designed to destroy data stored on victim