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Malicious MAL-2026-6120

@caspianph/storyteller

npm package · versions 1.1.13

Reported Jun 18, 2026 · Updated Jun 18, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (3bd24daaa395f2e6bfae7c6e6f488a6e114b87e2606ec1bce7dcd4ab6a92f40a)
The package ships setup.cjs containing heavily obfuscated JavaScript with hex-mangled identifiers (_0x32549a, _0x4b2b44, _0x78c349, _0x119ac2) typical of payload-hiding techniques. A file named setup.cjs in an npm package is structurally positioned to be invoked from a lifecycle hook (preinstall/install/postinstall) or required at module load. Legitimate npm packages do not obfuscate their install-time code; obfuscation in this position is overwhelmingly used to hide network beacons, credential reads, or dropper logic from casual inspection.