How does an antivirus works?
Friends ,
I would like to know how does an antivirus works. I heard it exactly check the signature of the files. what exactly the signature is.? I have a doubt like if some application is a virus, then how can it able to check its signature and all..? Can we able to get the details of an application ? I meant most of the windows viruses will be in the .exe definition. I don't think we cannot able to get source code details or anything from an exe file, we cannot decode it. so how does this antivirus checks these files, and detect the viruses.
I would like to know how does an antivirus works. I heard it exactly check the signature of the files. what exactly the signature is.? I have a doubt like if some application is a virus, then how can it able to check its signature and all..? Can we able to get the details of an application ? I meant most of the windows viruses will be in the .exe definition. I don't think we cannot able to get source code details or anything from an exe file, we cannot decode it. so how does this antivirus checks these files, and detect the viruses.
Replies
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Sanyam KhuranaFirst of all, Virus is just some statements, block of code, often coded in Batch File Programming. 😀
About your question, well I think it just detects any harmful function used in the code, i.e. deletion of system files, restarting function made recursive, etc. -
Anand TamariyaAll executable programs, including virus, are a segment of 0 and 1. You can write a program (say system call "del *.*") and see what does this translate into - this is virus signature. Then search all the executable files on your system and see if you see that pattern - this program is your anti-virus.
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shibi rajThanks very much friends... 😀
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