Types of computer viruses

admin on 07 11, 2010

7 different types of computer viruses classification according to their destination of infection and its activated form or method of activation:

Virus Master Boot Record (MBR). – Infect the MBR of a hard disk. It can be erased easily without an antivirus clean booting with a floppy disk and running FDISK / MBR from the command line.

Boot Sector Virus. – Infect both the boot sector and partition table of a disk. This type usually attempts to infect each of the discs that can be accessed on the infected system, staying in the area where the files are being loaded into main memory before any scheduled disk boot sector.

Virus system. – Produced to affect first the COMMAND.COM and then the MBR. This virus infects files that the machine uses to interface with the user, such as COMMAND.COM. Thus are acquiring control to infect every disk that is entered into the computer.

Virus files. – This virus attacks the files. Most of them invade executable files with extensions. EXE and. COM. Infection occurs when you run the program containing the virus when € sixth was loaded into the computer memory. Then it starts to infect all files with the extensions mentioned above when run, copying itself to them.

Macro virus. – Infect MS -Word documents, spreadsheets, MS -Excel files and databases in MS- Access. Macro viruses modify the pre-recorded sequences of instructions located in a document or template so that the opening run unwanted actions.

Multiple Virus or multiparty (Multiparty). – Infect executable files and boot sectors simultaneously. It uses a combination of techniques to spread.

Viruses HTML. – Infect the code in HTML files. This strain was developed in Visual Basic Script. Attacked Windows 98, 2000 and the latest versions of Explorer. This is because they need the Windows Scripting Host is active. You can delete or corrupt files.