![]() Apktool - disassembling and reassembling APKs □Īpktool can be installed manually, or if it's available via your package manager you can just install it using a command like apt-get install apktool. You need to have at least the Android tools and SDK, but for most people I would recommend to just install Android Studio and follow the instructions to set it up as normal (but skip stuff like the SDK for Android TV and other stuff that will slow down your download). Getting the tools □ Android - SDK, tools and emulators □ Actually, the Gator Watch app was a hybrid app and gave away everything with little effort. If it's a hybrid app you might not have to decompile it at all to get access to everything. zip and double click it or run unzip and you can start investigating the app. is the one I have used, and I have been pretty happy with it.Īs you might know, the APK file is really just a ZIP file, so you can typically just rename it to. You just upload the APK and get an archive with all the resources and decompiled files. ![]() The quickest and easiest way to decompile an APK is to just use an online service. If the APK is signed with the same key as an APK that you got from Play Store you should be able to trust its origin (though there have been cases of private keys in the wild (even repackaged APKs uploaded to the vendor's own web site)). Don't blindly trust the ones that I recommend either. The app might look allright, but still have some malware injected. There are quite a few sites that serves bogus or altered APKs. Note that you can get hold of different versions and the APK for different architectual platforms.Ī word of wisdom: Don't download and run some random APK out there (at least do it in a sandboxed and/or emulated environment). Some are more frequently updated than others. There are quite a few sites where to download them from. To get hold of an APK you can typically just google the package name. There are some good services out there that can provide you with most Android APKs, and then even some to decompile them. Very often you don't have to get your hands too dirty getting the hands of a decompiled app. This guide is just for educational purposes when you have legitimate reasons to do what you do. But hey, remember, don't do anything you are not allowed to. Other reasons to decompile apps could be to recover lost source code, to inject language translations or even fix a bug. In those cases you need to go one step further to be able to listen to the network traffic. However, once in a while there are apps that use e.g. When it comes to apps I often use a HTTP proxy like Charles to take a look at the HTTP and HTTPS traffic. Mostly I can use very simple techniques to check the security as there are so many basic security vulnerabilities out there. I've presented quite a few cases to prove that they very often are not. Sometimes I like to check if online services I use really are secure. :) I'm assuming some basic knowledge of UN*X, Java and Android. If you aren't a developer you might want to skip this one. This tutorial for how to crack Android apps is one of my more technical posts.
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