Full tutorial to patch APKs on Android using apk-mitm and APKLab. Support for bundle APKs.

This article provides a tutorial for patching Android APKs using the tools apk-mitm and APKLab, including support for bundle APKs (multiple APK files). It outlines steps to extract, decompile, edit, rebuild, and sign APKs, with specific instructions for handling single APKs versus bundle APKs using Split APKs Installer (SAI). The process concludes with installing the patched app on a device and optionally using a proxy SSL certificate for network inspection.

Patch APK Full tutorial to patch APKs on Android using apk-mitm https://github.com/shroudedcode/apk-mitm and APKLab https://github.com/APKLab/APKLab . Support for bundle APKs. Pull APK sh adb shell pm list packages adb shell pm path <package name If the app contains a single APK: sh adb pull /data/app/~~SzA2evEyrPV2ucUpwPzYYQ==/some path==/base.apk base.apk If it's a bundle APK multiple APK files : - Install Split APKs Installer SAI https://play.google.com/store/apps/details?id=com.aefyr.sai - Backup the app to a .apks file - Load the file to your computer - Extract the .apks file it's an archive - Create a copy of the .apks file, we will need it later when rebuilding the app Patch APK Open base.apk with APKLab https://github.com/APKLab/APKLab with options: - Only main classes - Decompile Java Inspect the Java code in the java src directory, find the function you want to edit. When found, go to its .smali file equivalent in the smali directory, do your edit and save. Right-click on the apktool.yml file: APKLab: Rebuild the APK . The APK file is generated at dist/base.apk . If you are working on a single APK, you can install it to your phone: sh adb install dist/base.apk Build bundle APK - Open your copy of the .apks file as an archive - Delete the base.apk file from the archive - Add your dist/base.apk patch APK file to the archive Using apk-mitm https://github.com/shroudedcode/apk-mitm sh apk-mitm my app-edited.apks ╭ apk-mitm v1.2.1 ├ apktool v2.6.1 ╰ uber-apk-signer v1.2.1 Using temporary directory: /tmp/apk-mitm-ab640ef99e9eacd6b96f033651301328 ✔ Extracting APKs ✔ Patching base APK ✔ Signing APKs ✔ Compressing APKs Done Patched file: ./my app-edited-patched.apks Quick SSL/HTTPS MITM patch Use the --certificate parameter your proxy SSL certificate sh apk-mitm --certificate charles proxy certificate.pem my app-edited.apks Install bundle APK - Load the my app-edited-patched.apks file to your phone - Install Split APKs Installer SAI https://play.google.com/store/apps/details?id=com.aefyr.sai - Install it Enjoy 💕