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Malicious package

npm-rce-safe-proof-yournamenpm

Advisory published Updated

npm-rce-safe-proof-yourname is a confirmed malicious npm package (MAL-2026-10159) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in npm-rce-safe-proof-yourname (npm)

MAL-2026-10159
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall npm-rce-safe-proof-yourname

What this malware does

On npm install, postinstall.js runs whoami, reads os.hostname(), process.platform, and process.version, and transmits them via HTTPS GET to a hardcoded remote endpoint at https://testnpm.byte.eyes.sh/npm-proof. This fires automatically as a lifecycle hook with no user consent. The package's declared purpose (npm script for showing date strings) and its self-labeling as a 'safe proof' do not match the observed behavior — the code is a functional install-time identity beacon transmitting the installer's username and hostname to an author-controlled destination. Beaconing installer identity to a hardcoded third-party host on install is credential/identity leakage regardless of the 'proof' framing.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

f9fdedc15d959d978bd3563d29d16c5ab226d3c4fa4ab8b6fecf8bdf130e29ab

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for npm-rce-safe-proof-yourname (version 1.0.0).

  2. If you installed it — respond

    npm-rce-safe-proof-yourname is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If npm-rce-safe-proof-yourname 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. npm-rce-safe-proof-yourname 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-2026-009647

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks npm-rce-safe-proof-yourname-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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npm-rce-safe-proof-yourname (npm) malicious package — MAL-2026-10159 | O3 Security