The Legend Of Random

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There are a couple ways of injecting a splash screen into a binary. Unfortunately, none of them easy. The way I will show in this tutorial is the easiest I’ve come across, though there may be simpler options out there. The problem arises from the fact that a bitmap is a resource, and as such, goes in the resources section of a binary. Injecting resources into a compiled binary’s resource section is a recipe for a quick headache.

The method we’ll be using is to create a DLL file with the resource included in it, and then call this DLL from our target binary. Because it’s a DLL, we can load it automatically by changing very little in the binary, as we can just add it to the list of DLLs the binary requires. This also gives us the benefit of running the code in our DLL automatically instead of having to create a code cave.

In this tutorial we will be creating a DLL from scratch using assembly, so you will need an assembly language compiler. I use RadASM

(and it will be more convenient if you use this IDE as well as your code will exactly match mine), but it is not a requirement. If you are not comfortable using RadASM and want to learn, please see my series of tutorials on RadASM on the tutorials page, which comes with a full download of the RadASM suite and everything you need to run it.

As with all of my tutorials, the required files for this tutorial are in the downloads, available on the tutorials

page. In addition to these files, we will be using IIDKing, available on the tools page.

If you haven’t already read my previous tutorials

on modifying binaries, I highly recommend you do (at least the tutorial on injecting a message box).

(continue reading…)