What distinguishes a trojan horse from a boot sector virus

Trojan horse are executed through a program and interprets as utility software. Resident and Non -resident viruses are two types of Virus. Back orifice, Rootkit and Beast Trojan are some of the common Trojan horses. Virus replicates itself. Trojan horse does not replicate itself.

Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. What's New. Most popular in Computer Networks. Files that claim to be something desirable but, in fact, are malicious. A very important distinction between Trojan horse programs and true viruses is that they do not replicate themselves.

Trojan horses contain malicious code that when triggered cause loss, or even theft, of data. For a Trojan horse to spread, you must invite these programs onto your computers; for example, by opening an email attachment or downloading and running a file from the Internet.

A worm is similar to a virus by design and is considered to be a sub-class of a virus. Worms spread from computer to computer, but unlike a virus, it has the capability to travel without any human action. A worm takes advantage of file or information transport features on your system to propagate.

What is not a virus: Hardware problems:No viruses can physically damage computer hardware, such as chips, boards, and monitors. The computer beeps at startup with no screen display:This is usually caused by a hardware problem during the boot process. Microsoft Word warns you that a document contains a macro: This does not mean that the macro is a virus. YES NO. Difference between Virus, Worm and Trojan Horse: Virus Worm Trojan Horse Virus is a software or computer program that connect itself to another software or computer program to harm computer system.

Worms replicate itself to cause slow down the computer system. Trojan Horse rather than replicate capture some important information about a computer system or a computer network. Virus replicates itself. Worms are also replicates itself. But Trojan horse does not replicate itself. Like worms, Trojan horse can also be controlled by remote.

Spreading rate of viruses are moderate. While spreading rate of worms are faster than virus and Trojan horse. And spreading rate of Trojan horse is slow in comparison of both virus and worms.

The main objective of virus to modify the information. The main objective of worms to eat the system resources. The main objective of Trojan horse to steal the information. Viruses are executed via executable files. Worms are executed via weaknesses in system.