What is Trojan Horse Virus

In computing, a Trojan horse, or Trojan, is any malicious program which misleads users of its true intent. The term is derived from the Ancient Greek story of the deceptive wooden horse that led to the fall of the city of Troy.

A trojan horse is a program which appears to serve a useful purpose but actually contains malicious code which executes when the user runs the application. Trojan horses are typically used to open a back door to the system on which they are executed allowing an intruder to subsequently gain access. It is always best to proceed with caution before downloading and installing any kind of free software downloaded from the internet. It also pays to frequently scan the ports on your system to ensure that a trojan horse is not lurking behind a port which would not normally respond to a port scan.

As the popularization of the Internet, the viruses are widespread beyond imaging. Trojan, widely known as one of the viruses, is trying to control another computer by using powerful client-server model, which is a central computer provides information and processes to multiple end-user computers. These computers that completely are invaded by Trojan are servers, and hackers use controller to operate servers. Once controller connects with Trojan, the client will own most power of the server so that the client can issue commands in the computer, such as brows, move, copy, and delete documents.


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