d7e7r7 / ssl_pinning_remover

An Android SSL Pinning Remover tool for Security research and Bug Bounty

Brief history

All it started with two simple questions:

How we can sniff ssl traffic in order to understand which services are invoked?

and

Is there a method to automate all the process from decompile a .apk to upload on your device?

For the first questions i found a lot of guides that explain the procedure of modify the AndroidManifest.xml and the network_security_config.xml but there is not a single formula, there are different factors to understand in order to do it correctly.

For the second question is: Yes... but.

i found different types of project the on Github but they aren't completely automated in all those phases so here we are.

I read a lot of guides most of those requires to have a rooted device so i tried to create something to sniff the encrypted traffic unrooted devices in order to help all security researchers, this software is UNSTABLE for now, a lot of "unlocked" apps maybe will not work with this mod.

How it works?

ssl_pinning_remover has all the following phases:

1. Unpack the .apk app with apktool
2. Check if the AndroidManifest.xml has the correct attributes and if network_security_config.xml exists with the correct tags
3. Repack the modified files in a new apk packet
4. Sign the new apk with a self signed certificate
5. Align the certified apk
6. it upload the new jar in the connected android device (Optional)

Prerequisites

To use this script you need to install all those softwares in your environment:

• Java JDK 8 or above
• apktool
• Android Debug Bridge (adb)

On your device:

• Enable USB Debugging

How to install

$ pip install -r requirements.txt
$ pip install ssl-pinning-remover

How to use

Parameter	Description	Mandatory
-i --input	Used to specify the input .apk path	Yes
-v --verbose	Used to increase the stdout verbosity	No
-u --upload	Used to specify if you want upload the "unlocked" apk in the connected device or not	No

Example

Elaborate without uploading .apk:

ssl_pinning_remover -i test.apk -v

Elaborate and upload .apk:

ssl_pinning_remover -i test.apk -v -u

The output path is the path where you launch the script. The modified apk will have the same name of the original apk but before the extension will be added ".unlocked.apk"

ToDo List

• frida-gadget implemetation

• Continue implementing studying difference configuration cases

• Make the software working for most of the applications in the play store

• Add more options

• Code review

Disclaimer

This project is for educational and research purposes only. Any actions and/or activities related to the material contained on this GitHub Repository is solely your responsibility. The misuse of the information in this GitHub Repository can result in criminal charges brought against the persons in question. The author will not be held responsible in the event any criminal charges be brought against any individuals misusing the information in this GitHub Repository to break the law.