CrackMe challenges for Android

 

Description.

This is the page where I’m going to post all my crackme challenges for Android. There are 3 difficulties: EASY, MEDIUM, HARD, let’s keep it simple =)) All samples are intended to run smoothly on Android Emulator, so no hardware devices are necessary (however, you can use one if you want to).

If you have any questions or just want to say “hi”, leave a comment here or check About page.

Tools.

There are several Android tools you will probably need. It’s not a definitive list, so feel free to use anything else:

  • APKTool -A tool for reverse engineering Android apk files;
  • dex2jarTools to work with android .dex and java .class files;
  • fakednsA regular-expression based python MITM DNS server with support for DNS Rebinding attacks;
  • jADXDex to Java decompiler;
  • JD-Gui – Yet another fast Java decompiler;

 

Crackme apps.

Here’s the list of .apk files. Remeber: EASY, MEDIUM, HARD.

NameDescriptionAdded on
crackme_0x01The very basic crackme challenge. Gives you chance to get familiar with all Android RE tools;June 24, 2018
crackme_0x02What if JD-GUI doesn't show you the password?June 24, 2018
crackme_0x03Some hashes, cats and strings generation.August 9, 2018

2 Comments

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  1. Hehe thanks 😉 I tried to bruteforce the third challenge 🙁 get the flag_3 recompiling xD
    Note: You forget to sign the first apk

    • Hi Rextco,

      I’m glad you liked the challenges. Currently, working on another bunch of Android crackmes, so keep in touch 🙂

      Good catch, had to modify it several times (probably forgot). Thanks.

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