chai-defender@1.1.0

Analysis

chai-defender is a trojanized clone of a chai assertion plugin. When the package is required, it spawns a background Node.js process that makes HTTP requests to check-server-state[.]vercel[.]app/server/v2. If the server responds with a 404 status and a 'token' field in the response body, that value is executed as arbitrary JavaScript code via the Function constructor — enabling remote code execution on the installer's machine. The C2 endpoint is hxxp://check-server-state[.]vercel[.]app/server/v2, and requests include a custom HTTP header 'bearrtoken' with value 'gemini'.