Reverse Engineering challenge #74.

Yet another crackme (or rather keygenme).

Executables:

It is just to be run with name and serial number as command line arguments. Valid ones are:


2Z7A7-EK270-TMHR4-BHC71-CEB52-HELL0-HELL0-EONP9
2Z7A7-6I7R9-MZGO9-FDQJ3-JN0Q6-HELL0-HELL0-72KJ9

The first serial number has E feature turned off, the second has E feature turned on.

There are two tasks:

Good luck!

More challenges: //challenges.re/; about solutions: //challenges.re/#Solutions.