Monday, 11 June 2012

Ten different viruses that are famous in the internet world part-1

A program that is intentionally written to disturb the normal processing of a computer is commonly called a virus but the standard term used is Malicious software.It is small piece of code that is intended to harm the host(user) computer or fetch some valuable information, whether it is personal, credit card or bank account.These malwares (short for Malicious software) either corrupt the valuable files in your computer or steal, information on your computer.
Malwares are primarily distributed through the internet,they land on your computer either as a an attachment to the downloaded file or while running scripts on the internet.And few virus are capable replication and are infected into other computers by portable devices like pen-drive or hard-disk.

Here's a list of 10 malware types that are famed in the internet world,which people would never like to encounter with.

10.Logic Bombs:-
These type of codes become active or start processing until some specific criteria or logic is met, which the programmer has set.These are quite dangerous codes as they are not detected by antivirus until they are active.So possibility of damage is is more.Additionally few codes are such that they get activated on certain dates such as April 1st or Halloween, these are are time bomb.Seeing my example may make you feel like time bombs are not virus, what if the written code activates at the end of a month and deletes all the details of transaction in a bank.

FAT, short for File Allocation Table was the standard technology or storage media,which was helpful in determining which sector a particular file was located in.FAT viruses alter or destroys the allocation of table hence its impossible to access that data again, making permanently unavailable.

These programs are specifically dedicated to inject or use other application's macro programming language to distribute themselves.These viruses are usually attack a text file, MS-WORD or EXCEL file.

7.Resident Virus:-
These viruses embed themselves into the computer's memory i,e they allocate memory for themselves and hence find a way to infect every program the operating systems executes.Usually these codes embed into system files so deeply that when it infects anti-virus,even the Anti-virus will nit be able to detect it.These virus are smartly written by hackers or coders so that the host user could not be able to find that his system in infected this way there would be chances of getting infected into other computers.

These are some kind of virus I really appreciate, because of their smart way of changing their looks to hide themselves from anti-virus.These type of viruses carry with themselves a encryption and decryption code.The function(behavior) of this code to harm does not change but the appearance changes.They decrypt and encrypt according to the need and thus the anti-virus find it hard to recognize the changing signature.


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