Malicious code in @years18/n8n-nodes-utils-helper-f (npm)
The npm package @years18/n8n-nodes-utils-helper-f contained malicious postinstall hooks that execute host reconnaissance, exfiltrate system information to an external server, probe internal networks, and install the mhddos DDoS framework on the installer's machine.
- Disclosed
- Last updated
- Blast radius
- Any developer or system installing @years18/n8n-nodes-utils-helper-f from npm; affected machines become DDoS nodes and leak internal network information.
- Ecosystems
- Attack vectors
- Affected entities
- @years18/n8n-nodes-utils-helper-fMalicious npm package with postinstall hook executing reconnaissance and DDoS malware
The npm package @years18/n8n-nodes-utils-helper-f was found to contain malicious code in its postinstall hook (callback.js / index.js). Upon installation, the package executes shell commands to gather system information including id and hostname output.\n\nThe malicious code probes an internal RFC1918 address (10.131.106.93:8888) via /dev/tcp, base64-encodes the collected reconnaissance data, and exfiltrates it via HTTPS GET requests to jasabersama.id/portfolio-data.php with TLS verification disabled. The server-side endpoint decodes the payload and writes results to /tmp/n8n_rce_result.txt.\n\nAdditionally, the postinstall hook downloads and executes the mhddos DDoS framework by running python3 /tmp/get-pip.py --break-system-packages, installing dependencies from /tmp/mhddos/requirements.txt, and executing /tmp/mhddos/start.py. This turns the installer's machine into an active DDoS node at install time.\n\nThe incident was identified and credited to the OpenSSF malicious-packages repository.
Indicators of compromise
- Packages
- @years18/n8n-nodes-utils-helper-f
- Domains
- jasabersama.id
- IPs
- 10.131.106.93
Remediation
- Immediately uninstall @years18/n8n-nodes-utils-helper-f from all systems
- Audit npm install logs and package-lock.json to identify all machines that installed this package
- Inspect affected systems for mhddos framework artifacts in /tmp and running DDoS processes
- Review network logs for outbound HTTPS connections to jasabersama.id and internal probes to 10.131.106.93:8888
- Regenerate credentials and SSH keys on affected systems
- Monitor affected machines for DDoS activity and isolate if necessary
- Update npm to the latest version and use npm audit to check for other malicious packages
Sources
- GitHub Advisory GHSA-5984-r5vf-56w4 · GitHub Advisory Database
Cite this entry
"Malicious code in @years18/n8n-nodes-utils-helper-f (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 12, 2026; last updated August 12, 2026. https://supplychainattack.org/incident/malicious-code-in-years18-n8n-nodes-utils-helper-f-npm-1wewjs
Suggest a correction
Found an error or have a newer source? Corrections to factual errors take priority over new entries.
Related incidents
- containedcritical
Malicious code in 3-buildsight-web (npm)
The npm package 3-buildsight-web contains malicious code that fetches and executes arbitrary JavaScript from a remote Bitbucket URL on module load, granting full page privileges to an unverified third party.
npmCompromised package - resolvedcritical
Malicious code in @usaa-grp-personal-profile/personal-profile-common (npm)
Malicious package @usaa-grp-personal-profile/personal-profile-common version 999.0.0 published to public npm as a dependency-confusion attack targeting an organization's internal registry. The package contains preinstall and postinstall hooks that exfiltrate hostname, username, and working directory to an attacker-controlled OAST endpoint on every install.
npmDependency confusionCompromised package - resolvedcritical
Malicious code in create-coin (npm)
create-coin@20.1.1 on npm contained malicious postinstall code that collected sensitive environment variables, credentials, and host reconnaissance data. The package impersonated an esbuild platform build and exfiltrated data to a hardcoded endpoint.
npmCompromised packageTyposquatting - resolvedcritical
Malicious code in @syncraft-labs/vue (npm)
The npm package @syncraft-labs/vue version 0.4.1 contained malicious obfuscated code in its ESM build that implements a blockchain-hosted C2 dropper (EtherHiding pattern), enabling remote code execution on any consumer importing the package.
npmCompromised package