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Malicious package

build-tracker-n5p1npm

Malicious code in build-tracker-n5p1 (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-6196
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall build-tracker-n5p1

What this malware does

Package name suggests build telemetry tooling, but the tarball ships beacon scripts (beacon18.js, beacon_linux.js) wired to a postinstall lifecycle hook ("postinstall": "node run.js" in package.json line 9). On install, these scripts collect host identifiers via os.hostname()/os.platform() and child_process, then issue outbound HTTP GET/POST requests via http.request from the installer's machine. This combination — auto-execute on install, host fingerprinting, and outbound HTTP exfiltration — is a classic install-time host beacon / data-exfiltration pattern. There is no legitimate build-tracking reason to fingerprint the host and beacon out at install time without consent or configuration.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

e731775fde27ad6db493d20397b27eee9b4a6ea0bf515f9516cc974ea3e12619

Frequently asked questions

No. build-tracker-n5p1 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-2026-007063

References

Credits

  • Amazon Inspector · finder

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O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection
build-tracker-n5p1 (npm) malicious package — MAL-2026-6196 | O3 Security