Simple CrackMe #2 - Find The Missing Key

[mattheig]

Language : C++
Platform : Windows x86
OS Version : Windows
Packer / Protector : none

Description

Gold: A Simple CrackMe Solve the missing key.

Bronze: If u don't find key - Patch it.

 Screenshot

Crackke.exe

Edited June 21, 2019 by mattheig

[Bidasci]

This program was very easy to solve without the key. All you have to do is rename one of the JNE to JMP and it would work. Created a patch for the file.

Download for a patch is in the attached files, the patch was created by dUP2.

simple.crackme.#2.patch.exe

[pwnium]

serial : find_me_if_you_can

[Coco420]

the key is find_me_if_you_can

ddd.exe

Edited October 28, 2019 by Coco420

[Mizre]

Started with searching all text strings for Unregistered then placed a BP on the first call prior to the badboy at that location

Some strange string is shown

A little further down there is a loop which reiterates the characters in the correct order to give the password

 

Spoiler

The password is : find_me_if_you_can

It was a good exercise for a newbie like me thank you. I realise that patching also achieves the same effect as registering but for some serial fishing is another option. As the great Lena 151 always said "There are many ways to attack a target"

Edited November 1, 2019 by Mizre
Add walkthrough to the solution

[nabasoki]

Spoiler

Password is: find_me_if_you_can

There is a loop on the function call at 0x??13D7 which enters the password words

[RamzanElCadro]

[greyrabbit]

Nice starting my cracking journey, cracked with patching, serial phishing and hex editing the serial key itself using x64dbg