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Malicious package

n8n-nodes-moonlet-utilsnpm

Advisory published Updated

n8n-nodes-moonlet-utils is a confirmed malicious npm package (MAL-2026-17177) 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 n8n-nodes-moonlet-utils (npm)

MAL-2026-17177
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall n8n-nodes-moonlet-utils

What this malware does

postinstall.js fetches an opaque binary from https://mkicom.com/.well-known/pki-validation/ct_dn8, writes it to /tmp/.nc, chmods it 0755, and launches it detached via spawn('/bin/sh', ['-c', 'setsid ' + OUT + '... &'], {detached:true}). The download URL is disguised under a .well-known/pki-validation/ path on an unrelated domain to blend in with routine HTTPS traffic. index.js is an empty stub (module.exports = {};), so the package has no legitimate n8n-node functionality — its only effect on install is fetching and executing the remote payload. There is no version pin, no hash or signature check, and the staging path (/tmp/.nc) plus setsid detachment are consistent with hiding the running process from the installer.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

f49ee5bcbcb7e8f1028de4021134fdbbc895e737700cf82a834fb26d3b23dd05

Detection & response playbook

Malicious package

  1. Find it

    Search your lockfiles and build artifacts for n8n-nodes-moonlet-utils (version 1.0.0).

  2. If you installed it — respond

    Remove n8n-nodes-moonlet-utils 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 n8n-nodes-moonlet-utils 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. n8n-nodes-moonlet-utils 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-2026-020538

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks n8n-nodes-moonlet-utils-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

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n8n-nodes-moonlet-utils (npm) malicious package — MAL-2026-17177 | O3 Security