Meaning it has all the dependencies within it. Statically linked means that the binaries is not in need of external libraries to work. Now the opposite of dynamically linked is statically linked. Breakpointĭynamically linked means that the binary is relying on shared-libraries to do some parts of the job. using the command file is enough to get a quick idea.Ī 64-bit executable, dynamically linked and not stripped. another good thing to know is information about the executable we are dealing with. So we sent the password but it’s a wrong one, we could make our computer spend all the night trying millions of passwords but that’s dumb and it’s not the purpose of reversing. So we can already see that it want us to provide an argument called password let’s do that. So we have an executable file that we want to know how it’s working, the first thing to do is to interact with it. I will take this cracke me file as an example here. also a really basic GDB manipulation is required, and of course programming Let’s Go I added links at the end of the Post to learn assembly both youtube videos and blog posts. Tho I will try to make it really simple and explain a lot of terms, but a Basic understanding of assembly will make reading this article more enjoyable and a better learning experience to you. they will try to understand what he is doing based on the input/output and using other tools made for this purpose. What all this people will try to do is reverse engineering your product. maybe he is just doing that for his own curiosity, maybe he want to Patch the executable and add new features to it, maybe he is trying to bypass a security check that you are using (licence key, password verification, custom encryption …), Or even another company who got jealous after seeing your product on the market and they are trying to know how it works so they can make their own and maybe even a better one. he want to understand how your program was made and try to mimic the source code. So the users knows nothing about how your product was designed, how the code is written and implemented, they only see what you want them to see, they only give inputs and get output.īut there is one users who is Not OK with that. As a programmer you develop you program by first making a design of it, you try to understand first how your program will behave in a lot of conditions, then you will implement this design into code with the help of a programming language which will produce a final executable/website/hardware… that you deliver to the users. What we will be doing now is called reverse engineering. In this blog post I will be explaining how to solve a simple beginner crackme.
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