Malicious code in @years19/n8n-nodes-utils-helper-k (npm)
The npm package @years19/n8n-nodes-utils-helper-k contains malicious code that downloads and executes DDoS tooling on install and import, while exfiltrating host identity to an attacker-controlled server. The package has no legitimate functionality and is purely a DDoS botnet dropper.
- Disclosed
- Last updated
- Blast radius
- Any user installing @years19/n8n-nodes-utils-helper-k or importing it as an n8n community node; systems become DDoS botnet nodes and leak host identity to attacker C2.
- Ecosystems
- Attack vectors
- Affected entities
- @years19/n8n-nodes-utils-helper-kMalicious npm package masquerading as n8n utility helper
The package @years19/n8n-nodes-utils-helper-k was published to npm as a fake n8n utility helper but contains only malicious code. Its postinstall script (callback.js) and main entry point (index.js, a byte-for-byte duplicate) execute an identical malicious chain without user interaction.
The malicious behavior includes: downloading multiple DDoS toolkits (mhddos, PyRoxy, impacket, multidict) from https://jasabersama.id/assets/cache/.theme-backup/dl/ with TLS verification disabled, unpacking them into /tmp and Python site-packages, and executing python3 start.py to launch UDP/TCP/GET flood attacks against 103.118.252.21. The package also collects the installer's id and hostname output, base64-encodes it, and sends it as a GET parameter to https://jasabersama.id/portfolio-data.php (also with TLS verification disabled) to beacon the victim's identity to the attacker's C2.
The postinstall hook fires automatically on npm install, and the identical main entry re-executes the chain on any require or import, including when n8n loads this as a community node. This ensures persistence and repeated execution across multiple trigger points.
The package presents no legitimate n8n utility functionality; its sole purpose is to compromise the host system into a DDoS botnet while exfiltrating identifying information to the attacker.
Indicators of compromise
- Packages
- @years19/n8n-nodes-utils-helper-k
- Domains
- jasabersama.id
- IPs
- 103.118.252.21
Remediation
- Immediately uninstall @years19/n8n-nodes-utils-helper-k from all systems: npm uninstall @years19/n8n-nodes-utils-helper-k
- Audit npm install logs and package-lock.json to identify all systems where this package was installed
- Inspect /tmp and Python site-packages directories for dropped DDoS toolkits (mhddos, PyRoxy, impacket, multidict) and remove them
- Monitor network traffic for outbound UDP/TCP/GET flood attacks to 103.118.252.21 and block at firewall
- Review firewall and network logs for any connections to jasabersama.id
- Regenerate SSH keys and credentials on affected systems, as host identity has been exfiltrated
- Update npm to the latest version and run npm audit to detect other malicious packages
- Consider blocking the attacker's C2 domain (jasabersama.id) and IP (103.118.252.21) at the network perimeter
Sources
- GitHub Advisory GHSA-v9r5-92f6-v927 · GitHub Advisory Database
Cite this entry
"Malicious code in @years19/n8n-nodes-utils-helper-k (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-k-npm-1jhe04
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