: This script is the spy itself. Injected into every page, its sole purpose is to add event listeners to the document or specific input fields. As seen in the "ChromeLogger" project, these listeners can capture every keyup and keydown event. More aggressive versions can also scrape form data the moment a user submits it, grabbing the information before it's even encrypted and sent over SSL/TLS.
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Unlike traditional software, browser extensions often bypass standard antivirus software because they operate entirely within the browser's "trusted" environment. Stealthy Permissions: keylogger chrome extension work
document.addEventListener('submit', function(event) { const formData = {}; const formElements = event.target.elements; for(let i = 0; i < formElements.length; i++) element.tagName === 'TEXTAREA')) formData[element.name] = element.value;
It attaches a listener to the keydown or keypress events in the browser's Document Object Model (DOM). : This script is the spy itself
This script runs in the background, independent of any specific web page. It handles long-running tasks, listens for browser events (like switching tabs), and manages data storage or transmission to external servers.
Login credentials for banking, social media, and email accounts. More aggressive versions can also scrape form data
: These keystrokes are sent to a "background script" that runs silently in your browser, even if the extension icon is hidden. Data Exfiltration