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Tensorlake npm Package Compromised to Deliver Shai-Hulud Credential-Stealing Worm

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Tensorlake npm Package Compromised to Deliver Shai-Hulud Credential-Stealing Worm

The npm package known as "tensorlake," a TypeScript software development kit (SDK) for Tensorlake applications, sandboxes, and cloud services, was compromised as part of a ChainDrop / Shai-Hulud supply chain attack.

The malicious version 0.5.144 "contains obfuscated malware that harvests credentials, exfiltrates secrets, establishes persistence, and executes remotely supplied code," Socket said. Version 0.5.144 is no longer available for download from the npm package registry.

An analysis of the compromised release shows that it contains a preinstall hook designed to launch a JavaScript file ("package/lib/setup.mjs"), an obfuscated loader that launches the main credential-stealing and self-propagating worm ("package/lib/Math_Symbol.js") using the Bun runtime.

The stealer malware is designed to harvest credentials across local files, CI environments, Kubernetes, and Vault sources. It also drops the HackBrowserData binary, exfiltrates the collected data, establishes persistence on the host, and facilitates the execution of remotely-supplied code.

"That combination extends the risk beyond a single stolen API key," Socket said. "Any secrets accessible to the executing process may be exposed, and persistence can retain attacker access after the affected dependency is removed."

"To propagate, the worm enumerates packages associated with the victim's publishing identity, builds Sigstore provenance, and republishes compromised versions," Socket explained. "Strings referencing a fake Copilot/Dependabot workflow suggest it also plants GitHub Actions workflows."

The malware also makes use of an Ethereum contract to resolve its command-and-control (C2) endpoint ("iseekaigogo[.]com"), with GitHub acting as a fallback mechanism to stage the encrypted stolen data in a public repository with the description "Shai-Hulud: Here We Go Again."


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