CTF Practice - Reverse Engineering Android Apps 101
Introduction On this blog we will crack some real world unsecured Android applications. For educational purpose only! Disclaimer: This guide is provided "as is" with no warranties with regard to the accuracy and completeness of the information provided herein. I am not responsible for any bad outcomes you or anyone may have because you followed this guide. I expect you to have knowledge of some programming language (Java, Kotlin, C/C++, C#), an inquisitive mind to try things out, and the patience to first google and try to find answers to simple questions. Environment : OpenJDK 8 Android Studio SDK Visual Studio Code IDE with APKLab Reverse Engineering Android Apps - DEX Bytecode The goal of this exercise is to crack a real world Android apps to bypass the verification code to become a premium user. Step 0x1 Download the Apk . Step 0x2 Decompile the APK with Visual Studio Code. Step 0x3 Examine the manifest. We see that it only have one activity. Step 0x4 Look for if-else co...