jadx
awesome
Our great sponsors
jadx | awesome | |
---|---|---|
40 | 145 | |
38,905 | 299,232 | |
- | - | |
9.2 | 7.3 | |
8 days ago | 7 days ago | |
Java | Shell | |
Apache License 2.0 | Creative Commons Zero v1.0 Universal |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
jadx
- Apktool in kali
-
A popular Bluetooth car battery monitor that siphons up all your location data
The best way is to just start practicing. I would say pick some simple apps on your (Android) phone and dig straight in.
The great thing about Android applications is that often they generally decompile quite nice into human readable Java soo the barrier of entry can be quite low to start reversing.
Grab a copy of JADX[1] - it will decompress and decompile the APK files. If you don't have an Android handset, use an emulator and/or grab APKs from apkpure[2]
Dynamic analysis is a bit more challenging. In my blog post I use Frida[3] extensively.
If you get started on something and get stuck/looking for support, feel free to DM me on Twitter[4], more then happy to help.
[1] https://github.com/skylot/jadx
[2] https://frida.re/docs/android/
[3] https://m.apkpure.com/
[4] https://twitter.com/haxrob
-
Hardware Question
This may be overkill but you can use an oscilloscope to manually calculate the baudrate, i.e. like this. It looks like it could be UART serial data, but this is a good resource to reference. Sometimes http is used as a means for communicating, and not necessarily directly to a browser see here. This is pretty common in embedded applications actually. You can try using dirbuster to see what hidden endpoints there are that may be used for video. If there's an RC, you can try and do what you were doing before on the drone for that (see what dmesg says when plugged in, check any open ports, etc). If it's a phone you connect to, you can RE the mobile app. I like using jadx for APKs to get a lay of the land. If you don't want to pop the SPI flash like i suggested earlier (and I suggest don't do that except for last resort), you can grep for firmware urls in the mobile app to see if it does OTA updates, and see if you can directly download it and analyze it with a disassembler like Ghidra. Since it's WiFi, you can also MiTM the traffic from an AP you control like your computer. I'm guessing video is probably going to be something like RTSP at an IP address, so you can grep in the mobile app for that, and that might be good enough to get your video feed honestly.
-
improved nintype
Jadx - skylot/jadx: Dex to Java decompiler (github.com) - Used for decompiling the apk - make the code readable
-
How to securely set end point url and encryption keys in CN1 app
I realized when app is decompiled using JADX class names are recreated as shown in this screenshot of sample app
-
Reverse Engineering the Facebook Messenger API
Not sure. I started reverse engineering Java apps very early in my life β initially it was J2ME games. Decompilers of the time sucked but that didn't stop me from modding Gravity Defied :P
I honestly don't know what's a good way of getting started on reverse engineering. There's a bunch of everything about Windows executables in particular, including "crackmes", but native machine code is a level up from JVM bytecode. Java classes and Android dex files can be decompiled back to sensible source with a good chance that you get something that can be compiled again. No such luck for native code β C/C++ compilation is a lossy process by its nature, especially the optimizations. Ghidra does a decent job but still requires a non-zero amount of manual assistance. Flash games also were good to hone one's reverse engineering skills since ActionScript decompilers did a pretty darn good job.
Anyway. To decompile dex to Java source, there's jadx: https://github.com/skylot/jadx
Since decompilation is sometimes lossy, there's apktool for when you want to put the app back together after tinkering with it: https://github.com/iBotPeaches/Apktool
It goes without saying that you also need a JDK and the Android SDK. In particular, you need apksigner form the SDK to sign the unsigned apks generated by apktool. You can also automate things a bit and use adb to deploy them to your device.
What I usually do is get a high-level overview of the app in jadx, and then modify the smali (dalvik bytecode in text form, very assembly-like) files generated by apktool.
-
What Happens When Your Phone Is Spying on You
A week ago I purchased a bluetooth device that takes some measurements. You require an Android or iOS application. The first thing the iOS app did was request permission for your location. Immediate fired up MITMproxy [1] running in transparent `--mode wireguard` and installed it's certificate in the iOS trust store. It was sending a whole bunch of data to China and HK. Since I don't have a jailbroken iPhone, it's off to Android.
For BLE scanning, Android does require permissions for location, but this application is using a Chinese branded tracking SDK and sending encrypted (within already encrypted TLS). So it's time to start reversing and instrumenting the runtime.
Well - not so easy, they used a commercial packer that encrypts their compiled bytecode and decrypts and runs it within a C++ library. I managed to bull the Dalvik out of memory using Frida[2], covert it to java bytecode with dex2jar[3] then into decompiled java with jadx [3].
Since the developer relied on the packer to hide/obfuscate their software, it's quite easy to follow. The libraries that do the location tracking on the otherhand are obfuscated so now I'm at the stage of identifying where to hook before the encrypted blobs are sent to servers in China.
I've sunk about 8 hours into this so far. The message here is that to understand what some applications on your phone does you need to really invest time and effort. The developers increase the cost to the consumer to know what their application is doing by obfuscation, encryption and packing. It's asymmetric.
[1] https://mitmproxy.org/posts/wireguard-mode/
[2] https://frida.re/docs/android/
[3] https://github.com/skylot/jadx
[3] https://github.com/pxb1988/dex2jar
-
Any legit cracking tutorial?
jadx: View the generated Java code for an app. This tool tries to recreate Java code from the smali bytecode, but keep in mind that sometimes it may not work because Java -> Smali conversion is not fully backwards compatible.
-
Apk.sh is a Bash script that makes reverse engineering Android apps easier
If you haven't tried Jadx [1], give it a shot. It's by far the easiest way to reverse Android APKs. I doesn't do patching or reassembly, but I used it for reversing the Delong'hi APK for longshot [2][3] and the quality of output was fantastic.
[1] https://github.com/skylot/jadx
[2] https://github.com/mmastrac/longshot
[3] https://grack.com/blog/2022/12/02/hacking-bluetooth-to-brew-...
-
Potentially OT: Any guides/crash course/cheatsheet on how to modify or perhaps reverse engineer an open source program to your preference?
Smali is a low level language for Dalvik bytecode and it can be quite a headache to interpret it correctly and achieve what you want. That's why I recommend another tool called jadx which can mostly recover Java code from a dex file, but unfortunately the conversion is not 100% possible. Also, editing is not possible with jadx.
awesome
-
AI-generated content, other unfavorable practices get CNET on Wikipedia banlist
In the days before "google it" was a synonym for "find it", we had different curated link sites, and even pyhsical magazines with hand-curated lists of links that people interested in a certain topic might find interesting. This still exists today in some forms, for example the "awesome lists" that you see for some programming topics, for example https://github.com/sindresorhus/awesome .
Just like there was a time when 90%-99% of all email traffic was viagra spam, I imagine in the future most of the internet by volume will be AI-generated trash, and those in the know will still circulate lists of where the other 1% can be found.
An even brighter scenario is that someone, maybe a kid tinkering in their garage, figures out how to make a search engine that finds the good stuff, doesn't immediately die to AI bot farms' SEO efforts, and is financially viable.
-
Resources I wish I knew when I started my career
2. Awesome Lists
-
The Top 10 GitHub Repositories Making Waves ππ
Software Engineering Blogs
-
Kyutai AI research lab with a $330M budget that will make everything open source
He appears to be the original creator of the βAwesome Xβ repo: https://github.com/sindresorhus/awesome
-
β¨7 Github Repositories to Master React
Awesome React
-
Do you know any books about programming worth reading?
I'm just going to leave this here: awesome git repo
-
No More Problems With GitHub Issues
You don't need any particular requirement to consult issues section on GitHub. If you need a place to follow along this post, my chosen repository for today's blog post is Awesome.
-
Artist for Hire?
I have an awesome list GitHub repository that needs a few icons & a banner made. I was wondering if any students in graphic design would be willing to commission a few for me? I'm willing to pay either hourly, or by the project and can pay cash or venmo. Note that the art will end up as CC0, so you'd essentially be waiving any right to the artwork.
-
Pulling my site from Google over AI training
yah, come to think of it in the curated space, this reminds me of that awesome X family of github pages. Looks like someone compiled a bunch of them here https://github.com/sindresorhus/awesome#databases. I have found those to be highly valuable treasure troves pregnant with rich and relevant information.
-
Top 10 "Must Have" Repositories for Web Developers
10. Awesome
What are some alternatives?
Apktool - A tool for reverse engineering Android apk files
free-for-dev - A list of SaaS, PaaS and IaaS offerings that have free tiers of interest to devops and infradev
enjarify
daisyui - πΌ πΌ πΌ πΌ πΌ βThe most popular, free and open-source Tailwind CSS component library
android-classyshark - Android and Java bytecode viewer
vitepress - Vite & Vue powered static site generator.
apk2gold - CLI tool for decompiling Android apps to Java. It does resources! It does Java! Its real easy!
MacType-Profile - Best mactype experience
procyon
TOAST UI Editor - ππ Markdown WYSIWYG Editor. GFM Standard + Chart & UML Extensible.
simplify - Android virtual machine and deobfuscator
developer-roadmap - Interactive roadmaps, guides and other educational content to help developers grow in their careers.