MAL-2026-14550 Malicious code in tset_racie (npm)

[email protected] ships a single 45KB obfuscator.io-style payload as its main entry (index.js). The file consists of a 551-entry RC4-encrypted string array, a base64+RC4 decoder, anti-debug self-defense that regex-tests function toString output to detect beautifiers/debuggers, and Function-constructor invocations that build a code string from concatenated decoded entries and immediately invoke it (e.g., const d=a[...](Function, a[...](a[...](a[...DIBMW...], a[...BHoLQ...]), ');'));H=a[...WEBmW...](d); followed by WEBmW: function(H){return H();}). Anyone who require()s this package immediately executes arbitrary code defined by the encrypted strings. The package metadata reinforces malicious intent: gibberish name (tset_racie), gibberish author (ptchli_knldg), empty description, no repository, no homepage, no dependencies, and no declared purpose — the disposable-publish shape typical of short-lived malicious uploads. The combination of a sole-file eval shell + runtime-assembled Function constructor + anti-debug guards + opaque metadata constitutes embedded malicious code; the encrypted payload's exact target (exfiltration, credential theft, dropper) cannot be statically resolved but the structural shape is unambiguous.

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.