Computer Virus
Definition
A computer virus is a kind of program which is inserted several strings of computer codes that can destroy the function or date of computers. It can affect not only the computer which has been infected, but also a group of computers which are related to the infected one.
Feature
Though a computer virus is a virtual program or a section of executable code, it still seems like a biological virus, which have ability of self-propagation, mutual infection, and regeneration. Computer viruses can replicate themselves by a unique way. They can spread quickly but are often difficult to eradicate. They can attach themselves to various types of files. When files are copied or transferred from one user to another, they will
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Once users update antivirus software or only the database in it, the viruses will be identified immediately.
Many times, virus writers will slightly rewrite their viruses again by use of assembly instructions plus junk code or add a shell or more to easily protect their viruses escaping from detection of the antivirus software.
Norton Antivirus, McAfee, PC-cillin from the United States, Kaspersky Anti-Virus from Russia, NOD32 from Slovakia, and other famous antivirus products which have a good reputation in the international community, are still limited by their abilites of detection and capabilities of shell check. The current total number of virus database are also only several hundred thousand or so, whereas there are over one hundred and thirty million new viruses discovered just last year.
Self-renewal is another new feature of recent viruses. Virus can vary and be updated with help of a network. The latest version of the virus could avoid being killed and continue to run on the infected computers. The writer of Panda Virus created a "virus update server" which could update his virus eight times in a day, even faster than the frequency of some antivirus software updating their virus database. It would be no surprise that antivirus software cannot identify the virus.
Apart from the two points above, many viruses also acquire new feature of against their enemies including antivirus software and
A Virus is a piece of malicious code that has the intent to damage your system.
Antivirus is programming program that outline to make PC gradually in light of the fact that programmer can be take the secret word and furthermore the records can be erase frame desktop and imperative things like video and picture there case about that treats, worms and Trojans.
Let’s say user (A) download an execution file (EXE) on his-her PC and double click on that file, if this file is infected the virus works based on the written code by the hacker/ attacker/ intruder and copy some files into the system. In case, user (A) does not have virus protection, the virus works perfect in destroying that computer or sending information from this computer to the attacker email. Viruses not only designed to destroy PC’s, but also designed to get information from
Computer virus is a program that can copy itself and infect a computer without the permission or knowledge of the user. Viruses perform some type of harmful activity such as accessing private information or corrupting
Signature files contain the latest list and behavior of known viruses that why it’s important to update the antivirus signature file before performing a scan on your computer. Anti-virus programs release signature files updates regularly sometimes daily sometimes more often because new viruses are being identified on a daily basis (Loza, 1999).
A common method of infection of a Windows computer is for a 'dropper' program to be run on a computer that then downloads a 'payload' file which actually does the malicious work. The initial dropper file is usually programmed to delete itself to avoid detection. The payload file would then remain active on the computer and is programmed to carry out certain tasks (e.g., pop-up adverts, warnings that you are infected and need to buy protection (scareware), encrypt personal files and demand a ransom for unlocking them (ransomware), contacting a command and control server to await 'orders' for exactly what to do, etc.) In this more common scenario, because the payload file has to remain active so Sophos AV can easily acquire a sample of the file and see if prevention from infection is already covered (e.g., in Sopho's existing library of file detection, or through our intelligent heuristic detection methods). If required an update can be published and Sophos users who enable Sophos Live Protection are immediately protected - those who disable Live Protection with receive the update (along with Live Protection users)
* They can clean a file system or disk of viruses once they have been found. This is done by scanning a database for established remedies, most antivirus solutions erase a virus immediately and it is expected that the recipient of a virus informs the sender straight away so that the source can be eliminated.
3.Most virus's stay and affect peple in the same way which means thta they aren't really changing
Virus is a program that infect the computer system which is made by hackers to spy or steal users personal data, which is my cause a significant damage to the computer system.
Viruses and worms are malicious programs that self-replicate on computers or through computer systems without the user being cognizant. Worms are a series programs that repeat themselves from system to system minus the use of a host fie. Worms use methods to infiltrate remote computers and launch replicas of themselves like email messages or coping files to an accessible disk. A computer virus is a
Computer viruses are minute program which is “embedded inside an application or within a data file which can copy itself into another program“(Adams et al, 2008 ) for the sole determination of meddling with normal computer operations. The consequences may range from corruption and deletion of data; propagation of virus on to network and deployment through attachments through emails in order to further creating havoc to all associated computing devices.
immune system keeps the virus inactive, but it is possible for the virus to reactivate and cause a
There are special viruses that creates different types of malicious problems on a network or computer, for instance it will create or open programs to perform tasks. Viruses is also used for denial of service attacks, password cracking and many more. This can be fought against by having a reliable protection service; it is safer if this is taken from the provider itself.
This report will outline that it would be useful for our company to subsidize free distribution of anti-virus software to our home users. There will be analysis of the connection between the company 's network and home users and how this will help our company 's problems with viruses. I will discuss the other issues besides providing free software to home users that affect the network security of our firm. Additionally, I will describe the roles of top management/non-IT management, IT professionals, and end-users in maintaining network security. Finally, I will bring out the role that Robert Vamosi envisions for corporate customers relative to free antivirus software based on his article, “Antivirus software must be free,
Viruses are generally often to steal information from computers that are infected. Most aren't successful. Either way, Viruses set out to harm your computer and it can also be a way for a computer virus to steal credit card numbers, passwords or account numbers and other sensitive data.