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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Uses authors parameter CS1 maint: The interception can occur by code injection of the actual operating system files that would handle the read request. Archived from the original on 20 December Unlike Windows users, most Unix users do not log in as an administrator, or “root user”except to install or configure software; as a result, even if a user ran the virus, it could not harm their operating system.
Upper Saddle River, NJ: Ina program called ” Elk Cloner ” was the first personal computer virus to appear “in the wild”—that is, outside the single computer or [computer] lab where it was created.
In contrast, a non-memory-resident virus or “non-resident virus”when executed, scans the disk for targets, infects them, and then exits i.
Wikimedia Commons has media related to Computer viruses. Gunn under the title “Use of virus functions to provide a virtual APL interpreter under user control” in This is because malicious hackers and other individuals are always creating new viruses.
Advanced Data Mining and Applications: Archived from the original on June 21, 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.
Archived August 4,at the Wayback Machine. Secunia PSI  is an example of software, free for personal use, that will check a PC for vulnerable out-of-date software, and attempt to update it. Likewise, an operating system on a bootable CD can be used to start the computer if the installed operating systems become unusable. Different antivirus programs use different “signatures” to identify viruses. A metamorphic virus is usually very large and complex.
Users would be required to click on a link to activate the virus, which would then send an email containing user data to an anonymous email addresswhich was later found to be owned by Larose.
Sprječavanje i uklanjanje virusa i drugog zlonamjernog softvera
An example of a virus that does this is CiaDoor. Event occurs at 32 minutes. A better term would be “search strings “.
At said times, the executable will decrypt the virus and execute its hidden runtimesinfecting the computer and sometimes disabling the antivirus software. This leaves antivirus software little alternative but to kompjjterski a “read” request to Windows OS files that handle such requests.
Computer virus – Wikipedia
Instrument engineers’ handbook 3rd ed. Ransomware is a virus that posts a message on the user’s screen saying that the screen or system will remain locked or unusable until a ransom payment is made.
Backups on removable media must be carefully inspected before restoration. The triggering phase can be caused by a variety of system events, including a count of the number of times that this copy of the virus has made copies of itself.
Burger, Ralf 16 February .
The art of computer virus research and defense. Archived PDF from the original on September 27, Its creator later kompjuterskii the source code to Usenetallowing researchers to see how it worked. Resident viruses overwrite interrupt handling code or other functionsand when the operating system attempts to access the target file or disk sector, the virus code intercepts the request and redirects the control flow to the replication module, infecting the target.
Even home computers were affected by viruses. This page was last edited on 15 Decemberat Your computer is infected! University of Illinois Press: Archived copy as title CS1 maint: