Go4Expert

Go4Expert (http://www.go4expert.com/)
-   Ethical hacking Tips (http://www.go4expert.com/articles/ethical-hacking-tutorials/)
-   -   What is a Virus? (http://www.go4expert.com/articles/virus-t12367/)

GreenGrass 23Jul2008 16:04

What is a Virus?
 
What is a Virus?

Have you ever ask your self that question befor? well here i am going to show you the basic of what a virus really is. A virus is a piece of code so will try to do wierd actions on your computer. Copy itselfs to diffrent places on the computer is the most commont action it will do. They may attach it self to a spesifc program or spesifc file type. The importent part to a virus is to survive as long as Possible. The writters to the virus want it to stay alive. What a virus will do is try to gain access to the system of the computer to take control over important Functions of the system. This is how a virus will try to stay alive. Some viruses may also try to attack Threats as AV's disable important functions like "Task Manager" so you can't turn off the Processes the virus is running in.

What i mean about important Functions is like "System Restore" ect this can restore the computer to a later condition. So to mabye delete all the restore points or even disable it from the user to use it. Viruses are much more harder to get ride of if they are Executed on the victems computer since than they can use hiding Techniques to try avoid to get detected by the AV's. They will most likely try to not exist on the computer. Since they are trying to merge with virus free programs so are legaly. Also they can try to Deny access to files they are hiding in so the AV's can't open them up. This is just few Techniques they will try to use to stay hidden on the victems computer. So you should always scan files befor you execute them.

So how can they really take away important Functions on the computer like "Task Manager"? Every function to the computer is saved in something called registry. So viruses will normaly do alot of changs there to take out functions so are important to the computer and user. Normal computer users without knowledge about registry are'nt able to turn thos needed Functions like Task Manager on again. There is alot of persons out there in the World so don't even know about how this really works. Think about every Person on the Earth nearly all have a computer so they have access to at home? But have they really any knownledge about the threats and how to deal with them? Answers is No!. So this is why its so very big risk for so many to get infected since they are'nt really prepared about the threats out there so are hiding in every single corner when you surf on the internet. They are'nt taking the Alert on how bad it really is. When they are download something they are't even beliving that it might be a threat? Are they even scan the Files befor they execute them? I think No! All thos problems would'nt be so big if peoeple really open up there eyes and took a look at whats going an.

What ever all the AV's and Security stuff poeple are making. It wont stop the threats as viruses and unwated programs will still be everywhere but if poeple just stopped up for one second and started to be abit more carefully about what they are doing on the Internet they might not be as so big risks as they are today. Just with simple few steps they can avoid to get infected.

HOW CAN I GET INFECTED?

- Downloading Software
- Clicking on Pop up windows
- Clicking on Attachments via E-Mail
- Have't patched up the computer
- Surfing on Unsecure Sites
- Entering unsecure IRC rooms
- Clicking on Links so you may get from "Messenger" or "E-Mail"

Here you see a few ways you can get infected with viruses. So as you see its very easy get it. But if you just thinking about what you are doing on the computer you can easy avoid alot of virus infections. Many Poeple may ask what is the best protection? There are't any program so can give you 100% secure computer. Best AV's you have on your computer is "You".

XXxxImmortalxxXX 24Jul2008 09:19

Re: What is a Virus?
 
very nice and informative

mye01 31Jul2008 18:36

Re: What is a Virus?
 
well for me a VIRUS is something really SCARY..both man and computer is afraid to get a virus..its a big no no for all of us.. :crazy:

tygog 27Nov2009 18:55

Re: What is a Virus?
 
virus creators are always one step ahead than those antivirus and softwares on the market:happy::D

KevinMartin 4Dec2009 17:36

Re: What is a Virus?
 
Virus is nothing but a one type of script which spread from one pc to another and when it will execute,it will harm to our oc and spread in whole pc .

technica 24Dec2009 15:07

Re: What is a Virus?
 
Who invented the name 'Virus'? Nice article mate, good to read it.

ShaunDsouza 5Jan2010 10:46

Re: What is a Virus?
 
Hi,
A computer virus is a computer program which can copy itself and infect other systems without permission from the user. Many computer viruses have other, more nefarious functions as well. There are many different types of computer viruses to reflect the wide range of infection paths and payloads.
Keep it up....

indiansword 6Jan2010 02:02

Re: What is a Virus?
 
Quote:

Originally Posted by tygog (Post 60812)
virus creators are always one step ahead than those antivirus and softwares on the market:happy::D

Its always going to be that way. Becuz AV companies can not update themselves with the virus script thats not actually created.

Prateek.sem 29Apr2010 09:44

Re: What is a Virus?
 
when it comes to hacking and other stealing stuff by using virus i can understand that...
but why do ppl create virus just to destroy the computers personal data ?

tygog 29Apr2010 14:37

Re: What is a Virus?
 
is there any virus that can fry a computer hardware like motherboards or cpu?

tygog 29Apr2010 14:39

Re: What is a Virus?
 
is it possible to create a virus that can fry a computer hardware like motherboards and stuffs like that?:thinking::thinking::happy:

Prateek.sem 29Apr2010 14:40

Re: What is a Virus?
 
Quote:

Originally Posted by tygog (Post 67593)
is there any virus that can fry a computer hardware like motherboards or cpu?


not exactly but can harm them indirectly.:freak:

Prateek.sem 29Apr2010 14:45

Re: What is a Virus?
 
Quote:

Originally Posted by tygog (Post 67594)
is it possible to create a virus that can fry a computer hardware like motherboards and stuffs like that?:thinking::thinking::happy:

i am not sure but .. assembly language can create very very powerful programs :sosp:

satyedra pal 29Apr2010 15:18

Re: What is a Virus?
 
A computer virus is a program that always affects the user work or prevent to do the work in a right way.

smithdyer 5May2010 09:49

Re: What is a Virus?
 
Computer virus (a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer) "a true virus cannot spread to another computer without human assistance"

By the for more information check this link

unni krishnan.r 5May2010 20:06

Re: What is a Virus?
 
Quote:

Originally Posted by technica (Post 62192)
Who invented the name 'Virus'? Nice article mate, good to read it.

virus is the short of Viral Information Resourses Under Sueie
:smug::):lipsrseal:confused::snobby::worried::mean ::nonod::nice::baby::thinking::charming::beadyeyes :snore::eek::grimreape:clover::pinch::mad::wacko:: gossip::puke::egypt::eye::wideeyed::glasses::close deye:stuart::quarrel::shifty::shifty::cheesy::smok er::smoker::xmas::paranoid::dead::joker::arf::band ana::bandit::rockstar::shame::rant::gun::cherry::d iscuss::discuss::ninja::boat::rambo::bulb::sailor: :deal::2thumbsup:leaving::bigear::grouphug::puzzle d::gunsmilie:policeman:smile::dog::devil::nuke:

grimsgrim 5May2010 22:59

Re: What is a Virus?
 
Quote:

Originally Posted by tygog (Post 60812)
virus creators are always one step ahead than those antivirus and softwares on the market:happy::D

yea thats very real and true

kvrvicky 9May2010 06:26

Re: What is a Virus?
 
how can i create a virus to close other system in online

jaikanth123 11May2010 12:00

Re: What is a Virus?
 
viruses can also infect certain types of data files, specifically those types of data files that support executable content, for example, files created in Microsoft Office programs that rely on macros.

Compounding the definition difficulty, viruses also exist that demonstrate a similar ability to infect data files that don't typically support executable content - for example, Adobe PDF files, widely used for document sharing, and .JPG image files. However, in both cases, the respective virus has a dependency on an outside executable and thus neither virus can be considered more than a simple 'proof of concept'.

In other cases, the data files themselves may not be infectable, but can allow for the introduction of viral code. Specifically, vulnerabilities in certain products can allow data files to be manipulated in such a way that it will cause the host program to become unstable, after which malicious code can be introduced to the system. These examples are given simply to note that viruses no longer relegate themselves to simply infecting program files, as was the case when Mr. Cohen first defined the term. Thus, to simplify and modernize, it can be safely stated that a virus infects other files, whether program or data.

In contrast to viruses, computer worms are malicious programs that copy themselves from system to system, rather than infiltrating legitimate files. For example, a mass-mailing email worm is a worm that sends copies of itself via email. A network worm makes copies of itself throughout a network, an Internet worm sends copies of itself via vulnerable computers on the Internet, and so on.

unni krishnan.r 3Jun2010 17:24

Re: What is a Virus?
 
Quote:

Originally Posted by technica (Post 62192)
Who invented the name 'Virus'? Nice article mate, good to read it.

The virus was invented by to pakistani brothers

unni krishnan.r 3Jun2010 17:27

Re: What is a Virus?
 
you acn read the history of computer viruses in http://www.symantec.com/connect/arti...istory-viruses

Raizo 29Aug2010 21:10

Re: What is a Virus?
 
thnks .. it was informative :)

parryzensg 2Sep2010 14:59

Re: What is a Virus?
 
hi...

How can we void the ethical hacking in our site..??? meet again.

sdowensr 3Dec2010 01:14

Re: What is a Virus?
 
Quote:

Originally Posted by unni krishnan.r (Post 68829)
The virus was invented by to pakistani brothers


The Creeper virus was first detected on ARPANET, the forerunner of the Internet, in the early 1970s. Creeper was an experimental self-replicating program written by Bob Thomas at BBN Technologies in 1971. Creeper used the ARPANET to infect DEC PDP-10 computers running the TENEX operating system. Creeper gained access via the ARPANET and copied itself to the remote system where the message, "I'm the creeper, catch me if you can!" was displayed. The Reaper program was created to delete Creeper.

A program called "Elk Cloner" was the first computer virus to appear "in the wild" that is, outside the single computer or lab where it was created. Written in 1981 by Richard Skrenta, it attached itself to the Apple DOS 3.3 operating system and spread via floppy disk. This virus, created as a practical joke when Skrenta was still in high school, was injected in a game on a floppy disk. On its 50th use the Elk Cloner virus would be activated, infecting the computer and displaying a short poem beginning "Elk Cloner: The program with a personality."

The first PC virus in the wild was a boot sector virus dubbed (c)Brain, created in 1986 by the Farooq Alvi Brothers in Lahore, Pakistan, reportedly to deter piracy of the software they had written.

arvindgvt1 3Dec2010 14:41

Re: What is a Virus?
 
A virus (from the Latin virus meaning toxin or poison) is a small infectious agent that can replicate only inside the cells of other organisms. Viruses are too small to be seen directly with a light microscope. ...

virender.ets 7Feb2011 16:23

Re: What is a Virus?
 
Is it possible to search virus location without antivirus?

arvindgvt1 7Feb2011 18:14

Re: What is a Virus?
 
a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer; "a true virus cannot spread to another computer without human assistance.

Thanks

seoabhisek 7Feb2011 18:49

Re: What is a Virus?
 
i think virus is a software programme created for creating discripencies in the normal working of computer.

seangtz 8Feb2011 09:47

Re: What is a Virus?
 
Hey, it could be very helpful if you share how detect Virus in the software?

mathewhogard 8Feb2011 10:56

Re: What is a Virus?
 
Virus is used to infect other computer.Above information covers the main point regarding virus.

kumarmannu 8Feb2011 13:13

Re: What is a Virus?
 
Nice article can u tell you,that who found it first.and which Anti virus is best.


All times are GMT +5.5. The time now is 14:39.