Computer virus is a program or codes that loaded onto your computer without your knowledge and run against your wishes and can copy itself. In thes research I will talk about computer virus and the differents types of computer virus and how it infects the computer.
Is an external program for the purpose of making deliberately change the properties of the files they infect to implement some commands either removal or modification or vandalism and other similar operations.
In other words, computer viruses are programs that are written for the purpose of harming a compatible another, or to control and are written in a certain way so many styles and develop highly.(Fenlon, M, 2013)
Computer Virus characterized as:
1- A Program copy and replace itself.
2- The computer virus connects itself to another program called an incubator.
3- Computer virus cannot establish host by itself .
4- Computer virus can move from an infected computer to another undamaged.
The Computer Virus consists of four main parts:
1- The Replication Mechanism: it is the part that allows the computer virus to copy itself.
2- The Protection Mechanism: this part hides the computer virus from detection.
3- The trigger Mechanism: Allow the virus to spread before the user knows his presence.
4- The Payload Mechanism: The part that performs computer virus.
Files types that the virus can infect:
In general the virus infects executable files or encrypted files is a text such as the following:
Files and records data (volume boot record) in floppy disks and a solid record number (0) in the hard disk master boot. (Kanish, 1997)
General-purpose files such as patch files and script files and windows shell in Unix.
You may use desktop operating system Microsoft Windows that contains a macro, such as Microsoft word , Microsoft Excel and Microsoft Access. (Kanish, 1997)
Database and files have a significant role in the pathogenesis and dissemination of injury to others to the e-mail address.
Files of type (pdf) and some HTML texts may contain malicious code. (Kanish, 1997)
Compressed files such as ZIP and RAR.
Ways to move:
The most important modes of transmission are now web internet be an easy way for transmission of the virus one device to another unless you use protection system such as firewall and anti-virus software comes second storage media such as flash memory and optical disks and floppy previously and also comes within e-mail messages and also transmitted the virus into your system when receiving files, any files stored on the (diskette or CD-ROM or DVD-ROM drive zip) symptoms(Kanish, 1997).
Three types of viruses: (virus, worm , spyware and Trojan horse) what is the difference between a virus, worm , spyware and Trojan horse?
. Virus: executive program (with type scr,.pif,.Bat,.Exe,.com) Works separately and aims to disrupt the computer system and...