TYPES OF COMPUTER VIRUS

A computer virus is a malicious program / software that copy itself into another program. The purpose of creating a computer virus is to infect vulnerable system, gain admin control and steal user sensitive data. It is quite easy and simple for the virus to sneak into a computer by dodging the defense system.

Types of Computer Virus

1. File Virus

This type of virus infects the system by appending itself to the end of a file. It changes the start of a program so that the control jumps to its code. After the execution of its code, the control returns back to the main program. Its execution is not even noticed.

2. Bool Sactor Virus

It infects the boot sector of the system, executing every time system is booted and before operating system is loaded. It infects other bootable media like Floppy disks. These are also known as memory virus as they do not infect file system.

3. Encrypted Virus

In order to avoid detection by antivirus, this type of virus exists in encrypted form. It carries a decryption algorithm along with it. So the virus first decrypts and then executes.

4. Multipartite Virus

This type of virus is able to infect multiple parts of a system including Boot Sector, Memory and Files. This makes it difficult to detect and contain.

Armored Virus

An armored virus is coded to make it difficult for antivirus to unravel and understand. It uses a variety of techniques to do so like fooling antivirus to believe that it lies somewhere else than its real location or using compression to complicate its code.

Written by - Aayush Sourav