Malicious code in @years19/n8n-nodes-utils-helper-g (npm)
The npm package @years19/n8n-nodes-utils-helper-g contained malicious code in its postinstall script and main entrypoint that downloads and executes offensive network-attack tools (mhddos, PyRoxy, impacket) on the installer's host. The code also exfiltrates system information to a remote server.
- Disclosed
- Last updated
- Blast radius
- Any developer or system that installed the malicious npm package @years19/n8n-nodes-utils-helper-g
- Ecosystems
- Attack vectors
- Affected entities
- @years19/n8n-nodes-utils-helper-gnpm package containing malicious postinstall and main entrypoint code
The npm package @years19/n8n-nodes-utils-helper-g was found to contain malicious code in both its postinstall script (callback.js) and main entrypoint (index.js). The code executes automatically on npm install and when the module is required.\n\nThe malicious payload downloads multiple tarballs (mhddos.tgz, pyroxy-full.tgz, impacket.tgz, multidict) from https://jasabersama.id with TLS verification disabled. These files are extracted to /tmp/mhddos and the Python user-site directory, then invoked via python3 start.py. The downloaded tools are offensive network-attack software.\n\nThe code also collects system information including the output of id and hostname commands, along with execution results. This data is base64-encoded and transmitted via HTTPS GET request to https://jasabersama.id/portfolio-data.php?k=S7k9xQ2mZj&c=.\n\nThe incident was identified by the OpenSSF malicious-packages project and reported via GitHub Security Advisory GHSA-p6h8-g62x-w9jg.
Indicators of compromise
- Packages
- @years19/n8n-nodes-utils-helper-g
- Domains
- jasabersama.id
Remediation
- Immediately uninstall @years19/n8n-nodes-utils-helper-g from all systems
- Audit npm install logs to identify when and where this package was installed
- Scan affected systems for the presence of /tmp/mhddos directory and extracted attack tools
- Review system logs for suspicious python3 process execution and network connections to jasabersama.id
- Check for unauthorized network activity or DDoS tool execution on affected hosts
- Regenerate credentials and review access logs on systems where this package was installed
- Use npm audit to identify and remove this package from all project dependencies
Sources
- GitHub Advisory GHSA-p6h8-g62x-w9jg · GitHub Advisory Database
Cite this entry
"Malicious code in @years19/n8n-nodes-utils-helper-g (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-g-npm-6u6ypz
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