Challenge: Playing with Codes (reveres engineering, CrackMe, ReverseMe)

Yesterday, I downloaded a target which I intended to Crack and write a tutorial about, but it was so easy to crack that I decide to play a little with the code and so this challenge was born.

To complete this Challenge you must with only a debugger:

1. Crack the program without changing a a jump
   (f.x you are not allow to change je to jne). 
2.  Change the code so the badbay shows the correct code for that email
   (no matter what email you put in, the correct serial should stand in the bad boy when you press “Ok”. You are still only allow to use a debugger) .
3.  Change the code so the program shows a message box with the text ” You did it” at startup before showing the main.
   (You are not allow to add resources. still only use your debugger.)

 

My Solution tutorial will be posted on Sunday, so if you have trouble completing it, you get the solution then. Can you complete it before Sunday?

You can get the target here

Please enjoy it, learn and have fun!

Xor06