This is solution to OWASP MSTG Crack Me Level 1 using dynamic binary instrumentation framework - Frida. Please check my youtube video for detailed walkthrough.

1. Solving OWASP MSTG
CrackMe using Frida
Level 01
Chandrapal Badshah

2. Tools required
1. Genymotion Android Emulator (AVD also works)
2. Android Platform Tools - adb
3. Frida
4. OWASP MSTG CrackMe Level 01 apk file
5. Jadx-GUI
Links given below in the description

3. Before we jump into solving the challenge, let’s see
what’s the challenge

4. The Challenge

5. Why not static analysis ?

6. Let’s see a demo and dive into the code

7. Challenge 1.1 - Bypass the root & debug detection
Please pause the video and think of a way to bypass it

8. Multiple ways to bypass this
● Hook each function c.a() , c.b() , c.c() and b.a() and return false.

9. Multiple ways to bypass this
● Hook each function c.a() , c.b() , c.c() and b.a() and return false.
● Hook the function a() and change the implementation of it.

10. Multiple ways to bypass this
● Hook each function c.a() , c.b() , c.c() and b.a() and return false.
● Hook the function a() and change the implementation of it.
● Hook the onClickListener() function of the button and change its
implementation.

11. Multiple ways to bypass this
● Hook each function c.a() , c.b() , c.c() and b.a() and return false.
● Hook the function a() and change the implementation of it.
● Hook the onClickListener() function of the button and change its
implementation.
● Hook the java.lang.System class and change exit() function’s
implementation.

12. Multiple ways to bypass this
● Hook each function c.a() , c.b() , c.c() and b.a() and return false.
● Hook the function a() and change the implementation of it.
● Hook the onClickListener() function of the button and change its
implementation.
● Hook the java.lang.System class and change exit() function’s
implementation.

13. Let’s do it !

14. Challenge 1.2 - Find the secret

15. Challenge 1.2 - Find the secret

16. Challenge 1.2 - Find the secret

17. Let’s crack the challenge !

18. Finally, we solved the challenge !

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