Hex files : How to make trojan virus undetectable by hex editor

I have been talking about FUD keyloggers and trojan virus throughout in my articles. I have even told you how to create keyloggers and trojans to hack victim email passwords. Today, I am writing about new concept to Hex files popularly called Hexing. By using Hexing, it is possible to
make our created trojan virus undetectable by antivirus.

What is this - Hex files???

Hex (Hexadecimal) is the way of representing data. In computer science, hexadecimal means base-16 numbers. These are numbers that use digits in the range: 0123456789ABCDEF.

Hexing is the the process of modifying application files using Hex editors (softwares used to edit files in hex format).


How Antivirus works???

First of all, lets know how antivirus flag any file as virus.

Antivirus works in a pretty complex way. To summarize its working in short, antivirus has virus definitions (also called signatures) stored in its database. While scanning a file, Antivirus searches for these virus definitions or signatures in a file and if it finds these signatures in a file, it flags these files as virus.


Hexing to make Trojan virus undetectable:

Now, when you know all the basics, its time to know what you have to do to make virus undetectable.

When you have created the virus file, simply open the virus trojan file in Hex editor and search for signature which Antivirus has flagged as virus definition. We have to change this signature such that it will not affect the working of our trojan virus.

There are many techniques used to search for virus signature in file and even change these signatures. You can do this manually or even by using software. Once you have successfully changed this signature, antivirus will not detect your trojan virus, thus making this virus trojan FUD.

Update: For detailed step-by-step tutorial on Hexing refer my article How to perform Hexing using Dsplit. I guess it will help you.

I will be writing more on various Hex editors and how to use them to make trojan virus undetectable. I hope this article helped you to get the basics of Hexing to make trojan virus undetectable. If you have any problem in
Hex files to make trojan virus undetectable,
please mention it in comments section.

Enjoy Hexing to make trojan virus FUD undetectable...

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