You can use a debugger to run your application and see exactly where in the stack x is located.

Any video(s) which introduce you into reverse engineering??

IDA pro or ollydbg?

No videos but this link

Ok, thanks I’ll check it :)

You’re welcome, you can also check other challenges websites that have levels in cracking/RE, root-me has good challenges.

Hi, after learning something about RE and learning to use ollydbg, I’ve been trying to do what I was asking at the beggining of the thread, but I found another problem:
0x008D245E | C745 F8 05000000 | [MOC DWORD PTR SS:[EBP-8],6

If you modify the number at the end, the number it displays when you run the program, will change.

The problem is that I can’t read nor modify this number with C++, as is not really stored in the memory; is just part of the program…. isn’t it?

“with C++”??

It’s part of the program, but the program is read into memory when you run it. You could do it with ollydbg, right?

I could, but I want to do it with c++ so I can automatize that.

Imagine I had a game, and I wanted to have infinite life, I would need to guess where’s the address of the life and then create a program with c++ that attached to the process read the memory etc.

The problem is that, at least in this program, which is much more simple than a game, the variable isn’t really stored in memory, but is inside the asm code!!
And I can’t modify the asm code from c++!

i know this two site, it’s for me interresting site with a lot of tuto

http://opensecuritytraining.info/Training.html

http://www.securitytube.net/

good hacking :)

What is ollydbg other than a program (possibly even written in C++)? Anything it can do, you can do in C++.