This script utilises payload dumper and image extractor tools to extract the apps from the system.img of an android OTA file. It works on Windows OS.

• Windows 10
• Python3 installed and added to environment variable
• pip3 installed and added to environment variable
• Python Modules -> protobuf==3.6.0, six==1.11.0, bsdiff4>=1.1.5
• If you face issues, install Windows 10 SDK & C++ build tools. Download the build tools here. Launch the Visual Studio Installer and select the Desktop development with C++ option. Install the default tool options for this. Upgrade the setuptools using the command python -m pip install --upgrade setuptools --user

Install the python modules using the requirements file: python -m pip install -r requirements.txt --user

1. Extract the OTA file.

2. Copy the full path of the payload.bin file present in the extracted OTA file, e.g. C:\root\ota 1\payload.bin

3. Run the script - python Extractor.py

4. When prompted enter the full path of the payload.bin

5. The system.img will get extracted from payload.bin

6. You will be presented 2 options - you can either extract all apps or you can specify the app names that you want to extract.

7. To extract all apps choose option 1

8. To extract specific apps, choose option 2

9. It will display the total number of apps on the image.

10. Enter the number of apps that you want to extract.

11. Enter the names of the apps that you want to extract. You have to enter full name of the APK e.g.
    CertInstaller.apk
    BasicDreams.apk
    KeyChain.apk
    

    

12. The extracted apps will be present in the output folder.