OpenSSF/OSV advisory MAL-2026-13864 confirms this npm version as malicious. The package's postinstall script and its main entry (index.js, byte-identical to callback.js) execute the same payload on `npm install` and on `require()`. The payload runs `id` and `hostname`, base64-encodes the output, and sends it to https://jasabersama.id/portfolio-data.php with `k=` and `c=` query parameters; TLS certificate verification is disabled (`rejectUnauthorized:false`)...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in @years18/n8n-nodes-utils-helper-t (npm)
Details
The package's postinstall script and its main entry (index.js, byte-identical to callback.js) execute the same payload on `npm install` and on `require()`. The payload runs `id` and `hostname`, base64-encodes the output, and sends it to https://jasabersama.id/portfolio-data.php with `k=` and `c=` query parameters; TLS certificate verification is disabled (`rejectUnauthorized:false`). The `c=` parameter carries a base64-decode-and-append shell command written to /tmp/n8n_rce_result.txt, giving the operator a server-driven command channel. The same script pip-installs `impacket` with `--break-system-packages`, probes for `PyRoxy`, and executes `python3 start.py` under /tmp/mhddos — staging and running an mhddos DDoS toolkit on the installer host. The package name mimics a legitimate n8n community node to lure installation.
Decision reason
OpenSSF Malicious Packages via OSV confirms @years18/n8n-nodes-utils-helper-t@1.0.0 as malicious (MAL-2026-13864): Malicious code in @years18/n8n-nodes-utils-helper-t (npm)