A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the .. Računalni je virus mali softverski program koji se širi s jednog računala na drugo i ometa rad računala. Računalni virus može oštetiti ili izbrisati. Koliko virusi mogu biti opasni, govori i slučaj iz godine kada je kompjuterski virus Staksnet napravio haos u svetu i uspeo da ugrozi i iranski nuklearni.

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Secrets of Reverse Engineering. In his essay von Neumann described how a computer program could be designed to reproduce itself. Press OK to Continue or Cancel to stay on the current page. They accomplish this by overwriting unused areas of executable files.

One may reduce the damage done by viruses by making regular backups of data and the operating systems on different media, that are either kept unconnected to the system most of the time, as in a hard driveread-only or not accessible for other reasons, such as using different file systems. These viruses modify their code on each infection.

In order to avoid detection by users, some viruses employ different kinds of deception. A better term would be “search strings “.

Computer virus

Retrieved June 21, Email virus — A virus that intentionally, rather than accidentally, uses the email system to spread. Any virus will by definition make unauthorised changes to a computer, which is undesirable even if no damage is done or intended. They can cause data lost and file corruption and need to be treated as soon as possible. Archived from the original on 20 December Security, Audit and Control Features.


In the early days of the personal computermany users regularly exchanged information and programs on floppies.

Sprječavanje i uklanjanje virusa i drugog zlonamjernog softvera

Many common applications, such as Microsoft Outlook and Microsoft Wordallow macro programs to be embedded in documents or emails, so that the programs may be run viruso when the document is opened. Most security software relies on virus signatures, or they employ heuristics. Retrieved September 9, On page one of Dr Solomon’s Virus Encyclopaediathe undesirability of viruses, even those that do nothing but reproduce, is thoroughly explained.

Primjerice, XP Security Agent In other projects Wikimedia Commons. This page was last edited on 15 Decemberat Archived from the original on January 17, This will make it more likely that the detection by the virus scanner will be unreliable, and that some instances of the virus may be able to avoid detection.

Kompjuterski Virusi

A dormant virus moves into this phase when it is activated, and will now perform the function for which it was intended. Likewise, an operating system on a bootable CD can be used to start the computer if the installed operating systems become unusable.

Archived from the original on October 5, kompjuteerski Because those files have many empty gaps, the virus, which was 1 KB in length, did not add to the size of the file. If a virus scanner finds such a pattern in a file, it will perform other checks to make sure that it has found the virus, and virisi merely a coincidental sequence in an innocent file, before it notifies the user that the file is infected.


If the virus is encrypted with a different key for each infected file, the only part of the virus that remains constant is the decrypting module, which would for example be appended to the end.

Computer virus – Wikipedia

Indonesia Bahasa – Bahasa. In this case, a virus scanner cannot directly detect the virus using signatures, but it can still detect the kkompjuterski module, which still makes indirect detection of the virus possible.

To enable metamorphism, a “metamorphic engine” is needed. This is because malicious hackers and other individuals are always creating new viruses. Computer Viruses, Artificial Life and Evolution.

A few years later, in FebruaryKompjutersk hackers from the virus-writing crew VLAD created the Bizatch virus also known as “Boza” viruswhich was the first known virus to target Windows