Malicious code in @years19/n8n-nodes-utils-helper-h (npm)
The npm package @years19/n8n-nodes-utils-helper-h contained malicious code that executed on install, downloading DDoS tools, launching attacks against a hardcoded target, and exfiltrating host information to an attacker-controlled server.
- Disclosed
- Last updated
- Blast radius
- Any npm user who installed @years19/n8n-nodes-utils-helper-h
- Ecosystems
- Attack vectors
- Affected entities
- @years19/n8n-nodes-utils-helper-hMalicious npm package
The npm package @years19/n8n-nodes-utils-helper-h was published with malicious code embedded in a postinstall hook (callback.js/index.js). Upon installation, the script downloaded four Python tarballs (mhddos, PyRoxy, impacket, and related payloads) from https://jasabersama.id/assets/cache/.theme-backup/dl/ with TLS certificate validation disabled, extracted them into /tmp and the user's Python site-packages, and executed python3 start.py in the background.\n\nThe malicious code launched three concurrent 600-second DDoS floods (UDP, TCP, and GET requests) against the hardcoded target 103.118.252.21 on ports 80/443 from the installer's host. It then collected host identity information (id, hostname), dependency-check output, process counts, and attack logs, base64-encoded them, and sent them as query parameters to https://jasabersama.id/portfolio-data.php with a hardcoded key. Both the payload downloads and the beacon communication disabled TLS verification (rejectUnauthorized:false).\n\nThe incident was identified and credited to the OpenSSF malicious-packages repository (MAL-2026-13891).
Indicators of compromise
- Packages
- @years19/n8n-nodes-utils-helper-h
- Domains
- jasabersama.id
- IPs
- 103.118.252.21
Remediation
- Immediately uninstall @years19/n8n-nodes-utils-helper-h from all systems
- Audit npm install logs to identify when the package was installed
- Check for unexpected Python processes or DDoS tools in /tmp and Python site-packages directories
- Monitor outbound connections to jasabersama.id for data exfiltration
- Review firewall logs for DDoS traffic originating from affected hosts targeting 103.118.252.21
- Regenerate any credentials or sensitive data that may have been exposed via the host identity collection
- Use npm audit to identify and remove any other malicious packages from the dependency tree
Sources
- GitHub Advisory GHSA-vxwh-8hm6-wcpp · GitHub Advisory Database
Cite this entry
"Malicious code in @years19/n8n-nodes-utils-helper-h (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 12, 2026; last updated August 12, 2026. https://supplychainattack.org/incident/malicious-code-in-years19-n8n-nodes-utils-helper-h-npm-4xhxvx
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