Flashback Flash PlayerSecurity Analysis

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

Dynamically creates script elements, potentially loading external malicious code.

Injects and executes scripts in web pages programmatically.

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.

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

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

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

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.

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

Line exceeds 5000 characters (entropy: 5.7236686883526176)

This extension does not define a Content Security Policy. A CSP helps prevent XSS and code injection attacks.

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

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

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

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