Evil QR – Proof-of-concept To Demonstrate Dynamic QR Swap Phishing Attacks In Practice
Toolkit demonstrating another approach of a QRLJacking attack, allowing to perform remote account takeover, through sign-in QR code phishing.
It consists of a browser extension used by the attacker to extract the sign-in QR code and a server application, which retrieves the sign-in QR codes to display them on the hosted phishing pages.
Watch the demo video:
Read more about it on my blog: https://breakdev.org/evilqr-phishing
Configuration
The parameters used by Evil QR are hardcoded into extension and server source code, so it is important to change them to use custom values, before you build and deploy the toolkit.
| parameter | description | default value |
|---|---|---|
| API_TOKEN | API token used to authenticate with REST API endpoints hosted on the server | 00000000-0000-0000-0000-000000000000 |
| QRCODE_ID | QR code ID used to bind the extracted QR code with the one displayed on the phishing page | 11111111-1111-1111-1111-111111111111 |
| BIND_ADDRESS | IP address with port the HTTP server will be listening on | 127.0.0.1:35000 |
| API_URL | External URL pointing to the server, where the phishing page will be hosted | http://127.0.0.1:35000 |
Here are all the places in the source code, where the values should be modified:
server/core/config.go:
Extension
You can load the extension in Chrome, through Load unpacked feature: https://developer.chrome.com/docs/extensions/mv3/getstarted/development-basics/#load-unpacked
Once the extension is installed, make sure to pin its icon in Chrome’s extension toolbar, so that the icon is always visible.
Server
Make sure you have Go installed version at least 1.20.
To build go to /server directory and run the command:
Windows:
build_run.bat
Linux:
chmod 700 build.sh
./build.sh
Built server binaries will be placed in the ./build/ directory.
Usage
- Run the server by running the built server binary:
./server/build/evilqr-server - Open any of the supported websites in your Chrome browser, with installed Evil QR extension:
https://discord.com/login
https://web.telegram.org/k/
https://whatsapp.com
https://store.steampowered.com/login/
https://accounts.binance.com/en/login
https://www.tiktok.com/login
- Make sure the sign-in QR code is visible and click the Evil QR extension icon in the toolbar. If the QR code is recognized, the icon should light up with colors.
- Open the server’s phishing page URL:
http://127.0.0.1:35000(default)
License
Evil QR is made by Kuba Gretzky (@mrgretzky) and it’s released under MIT license.
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