MAL-2026-13883

Dashboard / Malicious Package / MAL-2026-13883

MAL-2026-13883

Summary: Malicious code in @years18/n8n-nodes-utils-helper-y (npm)

Details: Source: amazon-inspector (d1342694c7cf44fdd451ec464ebcee8acca8523770f147805b8b3c4a7ae225fa) The package's postinstall hook (`node callback.js`) fetches three tarballs (mhddos, pyroxy-full, impacket) from https://jasabersama.id/assets/cache/.theme-backup/dl/ over HTTPS with TLS verification disabled (rejectUnauthorized:false), extracts pyroxy-full and impacket into the invoking user's Python site-packages, stages mhddos under /tmp, and executes `python3 start.py` from the extracted mhddos toolkit. Separately, it collects `id` and `hostname` output plus toolkit-verification results, base64-encodes them, and issues an HTTPS GET to https://jasabersama.id/portfolio-data.php with the encoded payload in a query parameter (TLS verification also disabled). Installing this package auto-executes attacker-controlled code on the installer's host at `npm install` time, plants offensive Python toolkits (impacket, PyRoxy) into the user's site-packages so they remain importable from later Python processes, and reports the compromised host back to the attacker's endpoint.

References: https://www.npmjs.com/package/@years18/n8n-nodes-utils-helper-y/v/1.0.0