Certisign WebSignerSecurity Analysis

Extension communicates with native apps and executes dynamic code — potential sandbox escape vector.

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

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

Dynamically creates script elements, potentially loading external malicious code.

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

Uses data URIs to execute code, bypassing content security policies.

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

Decodes base64 data, commonly used to hide malicious payloads.

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

Uses XMLHttpRequest to make network calls.

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

Opens a WebSocket connection, which can be used for persistent C2 channels.

Line exceeds 5000 characters (entropy: 5.392768493041369)

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

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

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

Creates a Web Worker, which runs code in a separate thread — can be used for background computation or crypto mining.

String with entropy 6.02 bits — may be encoded/encrypted data

main.js