[CrackMe] CrackMe Simulator 2018

This is a PoC-style test run for an application that I am currently developing as a personal project. Should anything weird happen, please report it to me and I’ll try to fix it. This is just a simple crackme so it shouldn’t be too hard once you start to figure out what’s happening… maybe…? :thinking:

Difficulty

Author Assigned Level: ¯\_(ツ)_/¯

Community Assigned Level:

  • Newbie
  • Wannabe
  • Hacker
  • Wizard
  • Guru
0 voters

Objective

  • Find the correct key.

Rules of Engagement

  • You may not modify the binary.

Binary

To retrieve the binary, use the following command with the base64 text below:

cat text | base64 -d | gunzip >binary

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KPoyFRr5bozii173on7KgckCvitxfPj5b9/f7LuQRQAA

Good luck!

13 Likes

The textbox insert newlines automattically on my mashine so some user has to use

base64 -id
for it to work

1 Like

Was fun! :smiley:

The flag is VM{M4TR1X}

3 Likes

Finally managed to finish it too :smiley:

$ ./crackme VM{M4TR1X}
Congratulations! You did it!

5 Likes

Although I’m late to this thread, I enjoy challenges a lot. So I’m going to put this on my to-do list.
-Archangel

Can i get some hint as to how to start cause i am new to c++ and this is my second reverse engineering. I put it in r2 but i am so confused as to how do i start.

So I think the name of the binary gives a clue. Run the executable in a debugger and see how it behaves. If you’re not familiar with r2, I would suggest you use something else like IDA Pro to make it easier on yourself.

thz for the reply, I managed to finish the beginner challenge of us [KEYGENME - EASY] Cracking Your First Program (learnt a lot) is this too big of a step for me hahaha?