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Malicious package

string-tools-be6cnpm

Malicious code in string-tools-be6c (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-6100
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall string-tools-be6c

What this malware does

Package ships a postinstall lifecycle hook (node run.js) that runs automatically on npm install. The executed script imports os, https, http, and child_process, reads host identifiers via os.hostname() and os.platform(), and issues outbound HTTP/HTTPS POST requests. This combination — install-time auto-execution + host-identity collection + outbound POSTs + child_process — is the canonical install-time host-beacon / dropper shape. The package name (string-tools-be6c) is a generic-name + random-hex-suffix pattern characteristic of throwaway supply-chain attack publications with no legitimate utility matching the observed runtime behavior.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

c725b56cc7e80c178e8d0fca3eceb069e811b979427b6ec99deab6b6f6cab8f7
c3354cd2bf560462cd49d85f56db444163db078aba1c0b9b2e468cb0a123a29c

Frequently asked questions

No. string-tools-be6c 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-2026-006965GHSA-93cp-5ff7-p9m5

References

Credits

  • Amazon Inspector · finder

Scan your dependencies

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

Supply-chain protection
string-tools-be6c (npm) malicious package — MAL-2026-6100 | O3 Security