How Computer Viruses Work by Type

Virus is a computer program that has the ability to destroy files or damage a computer system.
Viruses have many different types and has a way of working is different,

The following types of viruses and how each virus:

1. Virus Files
This virus has infected the workings of an existing application or document on your computer.
When an infected application is executed, the virus will spread by infecting files or documents accessed by the application.

2. Boot Sector Virus
This virus has a way of working that is infecting the hard disk boot sector (boot sector is an area in the hard drive is accessible when the computer is first turned on).
If the boot sector virus is active, users will not be booting the computer normally.

3. E-mail Virus
This virus has a way of working that is spread via e-mail (usually in the form of attached files / attachments).
The virus has a special characteristic of the extension. Scr,. Exe,. PIF, or. Bat.
If the virus is active, it will transmit itself to the various e-mail addresses contained in the user's address book.

4. Multipartite Virus
This virus has a way of working that infects computer files on the hard disk boot sector as well.
This type of virus will cause many problems because it causes a fatal damage.

5. Polymorphic virus
This virus has a unique way of working with this virus can change the code itself (change form) while spreading itself to other computers
The virus type is more difficult to detect because it has properties like that ..

6. Virus Beast (stealth virus)
This virus has a way of working that is he able to hide himself by making an infected file as if the file is not infected.

7. Macro Virus
This virus has a way of working which infect Microsoft Office applications, such as Word and Excel.
Documents are usually infected by Macro Virus will modify the existing command in Microsoft Office such as the "Save" to spread itself when the command is run.