Hi – I think my information can help: To make a virus scan-engine you’ll need to know a lot about viruses, antivirus techniques and virus signatures. I’ll start off by explaining: Terms note: In this post and in this thread we are not speaking about real human body viruses or something that is related to human health. What is a computer virus? A computer virus is a term that refers to a bit of source code written in C/C++ or any other language that has a sequence of bytes which are assembler instructions that can perform damaging actions to a personal computer (PC).

A virus code can typically be 2 500 bytes or even more. What is a virus signature? Virus signature is a term that refers to any sequence of bits that can be used to accurately identify the presence of that particular virus in a given file or range of memory. How does an antivirus program determine whether a file is infected or not?

Generally speaking antivirus software’s use two basic techniques to detect viruses one is called “signature scanning” (specific) and the other is called “Heuristics” (generic) each of them is different. The standard option that is always enabled is “signature scanning” – when an antivirus selects a file, it will first check the FILE_HEADER which allows the antivirus to determine whether this specific file is a executable one or something else, to do this the antivirus checks the first FILE_HEADER signature: PE (Portable Executable) and the MZ (Mark Zbikowski initial) format are the common today. As the antivirus finds the signature it checks with-in its own verification() method. PE signature = 0x5045h MZ signature = 0x4D5Ah After that the virus has managed to determine the file type by checking the FILE_HEADER signature, then the antivirus starts scanning deeply inside the file to check for similar signatures like those in the *.vps, *. Enter Shikari Common Dreads more. dat or any customized db-type file. As I described “Heuristics” is another method which antivirus software’s use to check files for infection, Heuristics is a method that is generic and uses generic characteristics of the computer virus – so the Heuristics method can detect all types of computer viruses and can also in some situations detect unknown computer viruses. Conclusion: Well the signature scanning is more specific and follows some rules and bases of how to scan and detect a virus, while Heuristics is more generic and can detect all kinds of stuff.

How to create a computer virus? This program is an example of how to create a ]]>virus]]>in C. This program demonstrates a simple virus program which upon. How can the answer be improved? Why is it so Hard to Remove a Virus Without Software? A hacker, or sometimes a team of hackers, who create computer malware all have at least one goal in common. Do you want to play a prank with your friend's computer by disabling their USB ports? If so here is a nice trick to create a virus to disable USB ports.

Now to the point: I would not recommend you Visual Basic (VB) for a task like this one, I’ll prefer C/C++ and C#, because, with C# you came some more efficient code also you’ll then able to easy P/Invoke the C++ written functions. For more information: Below are some threads were I have provided full information If you have any questions feel free to ask.

I hope this information was helpful Have a nice dayand a nice weekend. Bible Telugu Pdf. Best regards, Fisnik Coder24.com. This is not so hard to scan the files, But to do an anti-virus it is not only to find the signature and delete the file. 1) you need to have access at a database that hold all the virus definition. And this database have to be updated every days since these definition change all the time. 2) to remove a virus, it is often useless to delete the file, (I will not explain how this work here, politic of the site about the information on how to create a virus).