You can read more details about this proof of concept on the introductory blog post:

https://www.anvilsecure.com/blog/silly-proof-of-concept-anti-phishing-using-perceptual-hashing-algorithms.html

What is this?

A usable proof-of-concept for a browser extension that checks if a malicious site is trying to impersonate a valid one.

Its main features are:

• Local database: there is no central database, all information is kept in the user’s browser.
• Work with what the user sees: Hominoid flags malicious sites that look similar to the real ones, regardless of their code.
• Private sites: as all computations are done in the user’s browser, there is no difference between public and private sites. All of them can be analyzed accordingly.
• Better control: as the plugin resides in the user’s browser, it can be configured to analyze only pages with certain characteristics. For example a login form, a credit card field, etc.

Getting Started

Run the following commands to install dependencies and start developing

yarn install
yarn dev

Loading the extension in Google Chrome

In Google Chrome, open up chrome://extensions in a new tab. Make sure the Developer Mode checkbox in the upper-right corner is turned on. Click Load unpacked and select the dist directory in this repository - your extension should now be loaded.

Loading the extension in Brave

In Brave, open up brave://extensions in a new tab. Make sure the Developer Mode checkbox in the upper-right corner is turned on. Click Load unpacked and select the dist directory in this repository - your extension should now be loaded.

Loading the extension in Mozilla Firefox

In Mozilla Firefox, open up the about:debugging page in a new tab. Click the Load Temporary Add-on... button and select the manfiest.json from the dist directory in this repository - your extension should now be loaded.