Coinbase Wallet extensionSecurity Analysis

Extension has access to all sites and captures keyboard input — behavior consistent with a keylogger.

Listens for keyboard events, a common technique used by keyloggers.

Creates functions from strings, similar to eval(), often used to hide malicious code.

Dynamically sets a script's src attribute to load external code at runtime.

Uses eval() to execute dynamic code, a common technique for obfuscation and code injection.

Dynamically creates script elements, potentially loading external malicious code.

Creates a function from a string (new Function()), similar to eval().

Object.defineProperty() called on window — can intercept and override built-in browser APIs.

Uses eval() to execute dynamic code — a common vector for code injection.

JavaScript files are accessible to ALL websites. Any page can load and interact with these scripts, enabling web→extension attacks.

Sends messages via Chrome runtime, could communicate with external services.

Uses XMLHttpRequest to make network calls.

Dynamically creates iframe elements, which can be used to load external content or hide malicious UI.

Modifies window.location to redirect the user, potentially to phishing or malicious pages.

Decodes base64 data, commonly used to hide malicious payloads.

Opens WebSocket connections, which can be used for persistent command-and-control channels.

JavaScript file could not be parsed and has high entropy. May contain obfuscated code.

Line exceeds 5000 characters (entropy: 5.45247601002481)

Web-accessible resources use <all_urls> or wildcard patterns, exposing resources to every website.

Reads or writes to localStorage, which may contain sensitive site data.

Encodes data to base64, may be used for data exfiltration.

Sets innerHTML directly, which can lead to XSS if used with untrusted data.

object-src is not set to 'none'. Plugins like Flash can be embedded, which may allow code execution.

JavaScript file could not be parsed. Likely minified or bundled code.

6843.js