Yes, you can (most probably) consider this to be a fairly regular segment from this point on :) As I said before I’ve always been partial to RCE, and I don’t think I’ll ever get sick of it. Today’s installment is another tutorial that I felt shouldn’t be published. The reason is because it’s a tutorial on how to solve an example reversing challenge for the IITAC online RCE adacemy, and I generally don’t think it’s a good move to show other people how to do this stuff when they can get certified for it. However, this is just a training example so I think I’m safe.

The challenge consists of a few tasks:

1. Removing a nag-screen
2. Finding a hard-coded serial number
3. Finding a valid name/serial combination
4. Writing a key generator

You’ll notice from the tutorial that the full source code is included written in 32-bit ASM. Again, I would appreciate the feedback on the quality from anyone who wishes to give it (that includes you Alister ;) ) as I’m always looking to improve what I write.

You can grab it from here.