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Mobile App Reverse Engineering

You're reading from   Mobile App Reverse Engineering Get started with discovering, analyzing, and exploring the internals of Android and iOS apps

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Product type Paperback
Published in May 2022
Publisher Packt
ISBN-13 9781801073394
Length 166 pages
Edition 1st Edition
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Author (1):
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Abhinav Mishra Abhinav Mishra
Author Profile Icon Abhinav Mishra
Abhinav Mishra
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Table of Contents (13) Chapters Close

Preface 1. Section 1: Basics of Mobile App Reverse Engineering, Common Tools and Techniques, and Setting up the Environment
2. Chapter 1: Basics of Reverse Engineering – Understanding the Structure of Mobile Apps FREE CHAPTER 3. Chapter 2: Setting Up a Mobile App Reverse Engineering Environment Using Modern Tools 4. Section 2: Mobile Application Reverse Engineering Methodology and Approach
5. Chapter 3: Reverse Engineering an Android Application 6. Chapter 4: Reverse Engineering an iOS Application 7. Chapter 5: Reverse Engineering an iOS Application (Developed Using Swift) 8. Section 3: Automating Some Parts of the Reverse Engineering Process
9. Chapter 6: Open Source and Commercial Reverse Engineering Tools 10. Chapter 7: Automating the Reverse Engineering Process 11. Chapter 8: Conclusion 12. Other Books You May Enjoy

Converting DEX files to smali

Let's try to convert the same APK to smali files, using another tool we used in Chapter 2, Setting Up a Mobile App Reverse Engineering Environment Using Modern Tools.

In order to decompile the APK, run the following command:

# apktool d app-debug.apk

apktool uses smali/baksmali internally, while decompiling an APK file. The following figure shows that apktool is decoding the app-debug.apk file provided:

Figure 3.7 – Using apktool to decompile the application

Figure 3.7 – Using apktool to decompile the application

Once the APK has been decompiled, navigate to the folder created (in this case app-debug), and you will find several subfolders inside it with the name smali*. These folders contain the converted smali files from the .dex files in the APK:

Figure 3.8 – Decompiled content from apktool

Figure 3.8 – Decompiled content from apktool

Opening any of the smali files will show the respective version of the code. Let's look at the content of the smali files for...

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