comm
dex2jar
comm | dex2jar | |
---|---|---|
5 | 5 | |
258 | 11,875 | |
0.8% | - | |
10.0 | 5.0 | |
7 days ago | 25 days ago | |
JavaScript | Java | |
BSD 3-clause "New" or "Revised" License | Apache License 2.0 |
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.
comm
- React Native 0.71: TypeScript by Default, Flexbox Gap, and more... ·
-
The Code the FBI Used to Wiretap the World
We're basically working on this at Comm: https://github.com/CommE2E/comm
-
Ask HN: Who is hiring? (February 2022)
Comm | engineering | NYC onsite | https://comm.app
We're a startup based in NYC working on a Web3 Discord alternative. Comm is crypto-native messaging based on federated keyservers.
Our long-term goal is to build an alternative to the centralized application server model that dominates Web2. Sophisticated apps (like Discord) need a backend, but today those backends are controlled by corporations. Our solution is to replace the cloud with a network of personal, private application servers (we call them “keyservers”).
I starting working on Comm earlier this year. I’m a programmer by trade and previously worked at FB for 5 years. We currently have 10 devs actively contributing to our codebase, including 5 here in NYC.
We raised a small pre-seed round in February from some big names and are looking to raise our seed in the next 4 months.
Job descriptions available here: https://comm.careers
If this sounds interesting please reach out to [email protected]!
-
What are some good react native code bases to read?
Check us out! https://github.com/CommE2E/comm
dex2jar
-
Understanding security in React Native applications
App tampering and repackaging can be performed by using reverse engineering or tampering tools, such as Apktool, dex2jar, etc.
-
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
-
Reverse Engineering Tools in 2022
I think they forgot to google translate the disadvantages of JEB Decompiler
I haven't used JEB to comment, but I've gotten a lot of mileage out of https://github.com/pxb1988/dex2jar#readme and then feed the normal Java jars it produces into https://github.com/mstrobel/procyon#readme and (of course) one shouldn't overlook picking your favorite tool for dealing with AndroidManifest.xml which often has fun things hiding in it
While digging up those links, I was reminded that some folks enjoy https://github.com/Konloch/bytecode-viewer#is-there-a-demo because it can be easier to "try out" a few of the decompilation engines, but I don't use it because it's hard to do batch things with it, versus dex2jar into procyon is automation friendly
- The Code the FBI Used to Wiretap the World
-
Decompilers for android
Take a look at apktool: https://ibotpeaches.github.io/Apktool/ and dex2jar: https://github.com/pxb1988/dex2jar
What are some alternatives?
vineflower - Modern Java decompiler aiming to be as accurate as possible, with an emphasis on output quality. Fork of the Fernflower decompiler.
Apktool - A tool for reverse engineering Android apk files
Recaf - The modern Java bytecode editor
React-Native-Apps - Curated List of Open Source React Native Apps. Curation curtesy of
ricochet - Anonymous peer-to-peer instant messaging
serverless-graphql - Serverless GraphQL Examples for AWS AppSync and Apollo
procyon - Procyon java decompiler - Procyon is a binary star system in Canis Minor
rainbow - 🌈‒ the Ethereum wallet that lives in your pocket
bytecode-viewer - A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)