Keylogger Chrome — Extension Work ((better))

A Chrome extension keylogger is a type of malicious software that records everything you type within your web browser

Form Grabbing: Some specifically target forms to steal data like usernames and passwords before they are even submitted. keylogger chrome extension work

3.3 Using Legitimate APIs (Living off the Land)

The most dangerous keyloggers exfiltrate data through legitimate services: A Chrome extension keylogger is a type of

1. Injection: The user installs the extension (often disguised as a useful tool like a PDF converter, weather widget, or VPN).
2. Event Listening: The content script injects an event listener into every page the user visits. Specifically, it listens for the keydown, keyup, or input events.
3. Capture: When a user types into a form field—say, a password box or a credit card field—the event listener triggers a function.
4. Exfiltration: The function captures the character typed and sends it to an external server controlled by the attacker. This is often done via an asynchronous HTTP request (AJAX) or WebSocket connection.