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Part of a larger attack: @years18 published 23 malicious packages. See the full campaign →
Malicious package

@years18/n8n-nodes-utils-helper-onpm

Advisory published Updated

@years18/n8n-nodes-utils-helper-o is a confirmed malicious npm package (MAL-2026-13859) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @years18/n8n-nodes-utils-helper-o (npm)

MAL-2026-13859
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @years18/n8n-nodes-utils-helper-o

What this malware does

The package presents itself as an n8n community node but ships a stub node file (nodes/PwnNode.node.js, 213 bytes, description "x") whose only real behavior is a postinstall dropper. On install, callback.js fetches two tarballs from jasabersama.id over HTTPS with TLS verification disabled (rejectUnauthorized: false), extracts one to /tmp/mhddos and the other into the user's Python site-packages, installs a list of Python DDoS-support dependencies via pip with --break-system-packages, then executes python3 start.py from the extracted MHDDoS archive. The same script runs id and hostname, base64-encodes the output along with install-progress markers, and sends it via HTTPS GET to jasabersama.id/portfolio-data.php with TLS verification disabled. The declared n8n utility purpose is a cover story for the install-time payload.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

5b7ec0fd707d50145d85051b5c960139ebe64dc5f12c89ee22ecfa8402d169c4

Detection & response playbook

Malicious package

  1. Find it

    Search your lockfiles and build artifacts for @years18/n8n-nodes-utils-helper-o (version 1.0.0).

  2. If you installed it — respond

    Remove @years18/n8n-nodes-utils-helper-o from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If @years18/n8n-nodes-utils-helper-o was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. @years18/n8n-nodes-utils-helper-o on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-017398

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @years18/n8n-nodes-utils-helper-o-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
@years18/n8n-nodes-utils-helper-o (npm) malicious package — MAL-2026-13859 | O3 Security