Viruses

Computer Viruses

In information security , computer virus is a manmade program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes. From behavior computer virus in a way is a similar biological virus which pervasions by inserting itself into living cells. Cell by cell and all organisms (computer) is ridden virus cells.


Without computer viruses there are separated two other types of malicious computer programs – viruses.


Trojan Horses


As already from this virus type name we can imagine, Trojan horses are programs that pretend to be legitimate software, but actually carry out hidden, harmful functions. Trojans can’t replicate themselves that mean, they can’t expand so fast as other virus types. But often they work together with viruses.


Worms


Worms are similar to viruses but do not need a carrier program or document.

Worms simply create exact copies of themselves and use communications between computers, for example e-mail, to spread.There are different types of computer viruses with different influence. Some viruses are fairly harmless or only annoying, but there are viruses that can create inconceivable damages.


Some things what virus can do with computer:


* Slow down e-mail – generating huge e-mail traffic and slowing down servers;


* Steal confidential data – for example, recording user’s keystrokes;


* Use your computer to attack websites;


* Let other user hijack your computer – allowing to connect to your computer and use it for their own purpose;


* Corrupt data – making changes in some documents;


* Delete data – all or only some part data on your HDD;


* Play pranks;


* Damage credibility – forwarding itself from your computer to your friends or even business partners;


* Cause embarrassment – for example, replacing one word in all documents with other.


Every year computer viruses activity brings to company several million dollars damages. Year for year this number of damage increase!


Because it is so important that every people get information security awareness training!


Article source: InfoSecurityLab

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computer viruses”Information About Viruses”

A growing problem in using computers is computer viruses. Viruses are pesky little programs that some hacker with too much time on his hands wrote.  Viruses have been known to create annoyances from displaying messages on the screen, such as “Your PC is now stoned,” to completely obliterating everything that is contained on the computer’s hard disk. Viruses are transferred from computer to computer in a number of ways. The most common way that users receive viruses at home are downloading programs off the internet, or off of local Bulletin Board Systems, or BBSs. These viruses are then transferred to a floppy disk when written to by the infected computer.  Computers can also be infected when a disk that is infected with a virus is used to boot the computer. When this computer is infected, every one who writes a floppy disk on this computer gets their floppy disk contaminated, and risks getting this virus on their computer, which may not have good virus protection.

On IBM-Compatible PCs, viruses will only infect executable programs, such as the .EXE and .COM files. On a Macintosh, any file can be contaminated. A disk can also be infected even without any files on it.  These viruses are called BOOT SECTOR viruses. These viruses reside on the part of the floppy disk, or hard disk that store the information so that these disks can be used, and is loaded into memory each time the computer is booted by one of these disks.

DON’T DESPAIR!

Despite all of what has just been said, viruses are controllable. Their is

software called Virus Protection Software. A couples of programs that have been proven to work are F-PROT and McAfee’s Virus Scan. These programs scan the computer’s memory and the files contained on the hard disk each time the program is executed.

These programs also resided on the computer’s memory.  These programs will help reduce the spread of viruses.

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