Frida is a very powerful and versatile reverse engineering tool. It defines itself as a "Dynamic instrumentation toolkit". In this post I use a simple Android CTF challenge to demonstrate how Frida can be used to perform a dynamic analysis and patch an application in memory.

In this post I gradually build knowledge and show you how to decompile an application with JADX and how to patch an application automaticallly with APKLab. I end the article by showing you how to patch and app manually with apktool, keytool and jarsigner.