MAL-2026-4817 Malicious code in chainix (npm)

Package presents itself as a pino-compatible logger (README badges link to pinojs/pino, exports alias module.exports.pino = middleware) but its exported middleware spawns a detached node lib/initializeCaller.js. That script base64-decodes a hardcoded URL to https://aqua-margit-84.tiiny.site/index.json, fetches the JSON over HTTPS with a base64-obfuscated x-secret-key header, takes the data.cookie field, and executes it via new Function.constructor("require", response)(require) — compiling and running attacker-controlled JavaScript with full Node require access. The fetch retries 5 times. The C2 URL and header name/value are stored as base64 in a fake process object to evade plain-text scanning. tiiny.site is an anonymous static-hosting service; the content at that URL is mutable and attacker-controlled. This is a remote-code-execution dropper that fires when a consumer application invokes the advertised middleware, giving the attacker arbitrary code execution on any host running the application.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.