Jadx Decompiler Download
Corene Ollig
JD-Core is a JAVA decompiler written in JAVA. JD-Core is a standalone JAVA library containing the JAVA decompiler of "Java Decompiler project". It support Java 1.1.8 to Java 10.0, including Lambda expressions, method references and default methods. JD-Core is the engine of JD-GUI.
jadx is generally used with a graphical user interface, start the jadx-gui.bat file (inside the jadx-folder/bin folder) with administrator rights. As first you will get a window that allows you to choose the APK file that you want to decompile:
Once you've selected the file, jadx will decompile it and will provide an explorer IDE-style (tree style view) in the left side of the application that list all the Java packages and files of the APK. In this example we are going to use the APK of Our Code Editor Premium, whose native code is based in Cordova and the app itself with Javascript (the source code is inside Resources/assets/www):
In the past few days, I had some fun trying to understand the inner workings of an APK file.Previously, I had only used the legendary JD-GUI as a decompiler for some CTF challenges.But when dealing with more complex code, I found that looking at the output of different decompilers can help.Hence, I did a little research to find more decompilers that use different approaches.This post serves as a little reference on how to build and use these tools.
For the first approach, jadx is the way to go.If your target is an APK file, you should definitely give this tool a try.I saw that a lot of APK analyzers rely on it, which probably means that it does a good job.
Next up is Fernflower, which is part of IntelliJ IDEA.Everyone mentions that it is an analytical decompiler (as stated in their project description), but nobody points out what this actually means.I only found this Stackoverflow question, which unfortunately remains unanswered as of today.
GUI tools like Bytecode Viewer also use multiple decompilers under the hood and allow you to see their output nicely side-by-side.But I prefer going the manual way to see what parameters I can adjust.You have more control over how you launch a decompiler, and you will probably learn new things.
JaDX - Decompiler is a free app for Android published in the System Maintenance list of apps, part of System Utilities.
The company that develops JaDX - Decompiler is Nick Software. The latest version released by its developer is 1.2. This app was rated by 5 users of our site and has an average rating of 3.1.
To install JaDX - Decompiler on your Android device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2013-12-01 and was downloaded 2577 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the JaDX - Decompiler as malware as malware if the download link to ua.naiksoftware.jadx is broken.
How to install JaDX - Decompiler on your Android device:
- Click on the Continue To App button on our website. This will redirect you to Google Play.
- Once the JaDX - Decompiler is shown in the Google Play listing of your Android device, you can start its download and installation. Tap on the Install button located below the search bar and to the right of the app icon.
- A pop-up window with the permissions required by JaDX - Decompiler will be shown. Click on Accept to continue the process.
- JaDX - Decompiler will be downloaded onto your device, displaying a progress. Once the download completes, the installation will start and you'll get a notification after the installation is finished.
If you try to change your language to Russian, this won't work.So what is happening? How does this application checks that we are on a Russian device?To answer these questions I'll use jadx, a decompiler capable of producing Java code from an APK.
If you haven't got it on your system yet, I'll let you follow the installation process then run the graphical user interface with jadx-gui. There you should select the application kgb-messenger.apk to start the decompilation process.
You may want to try jadx, which supports decompiling *.aar since v0.6.1. You could save the decompiled code as a Gradle project, which you could then open it in Android Studio and do the refactoring.
While I think it is really cool to have an integrated decompiler, DAD still has a lot of polishing to go through. There are issues that I encountered that involved some unexpected Dalvik code layouts and caused the Python interpreter to end up in an endless loop and quitting (instead of throwing an exception, which would be a much better choice, seeing how you can lose your work if the whole python app just quits on you).
In my opinion, the Androguard is a useful tool that will hopefully be maintained further, including the integrated DAD decompiler. My wish is that it becomes solid enough so that I can remove all other integrations which I have frankensteined into my tools to make my static analysis work as I like it.
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