Computer Trojans received their name from the infamous mythological horse. The Trojan’s basic mission is to mislead people of its real goal. A Trojan is malicious software that usually needs to be launched by the user or another malicious program.

Malicious code typically penetrates the system under the guise of a useful utility or tool. However, the main task of such software is to perform one or more of these malicious actions:

• Delete user or system data
• Change user or system data
• Encrypt user or system data
• Copy user or system data