kgretzky/evilqr

Evil QR

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 on Youtube

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.

Here are all the places in the source code, where the values should be modified:

server/core/config.go:

const API_TOKEN = "00000000-0000-0000-0000-000000000000"
const BIND_ADDRESS = "127.0.0.1:35000"

server/templates/index.html:

const API_URL = "http://127.0.0.1:35000";
const QRCODE_ID = "11111111-1111-1111-1111-111111111111";

extension/background.js:

const API_TOKEN = "00000000-0000-0000-0000-000000000000";
const API_URL = "http://127.0.0.1:35000";
const QRCODE_ID = "11111111-1111-1111-1111-111111111111";

Installation

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

1. Run the server by running the built server binary: ./server/build/evilqr-server
2. 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

3. 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.
4. 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.