The '@vite-js/ui' npm package impersonates the official 'vite' package by copying author information, homepage URL, README, and distribution files. It includes an obfuscated Immediately Invoked Function Expression (IIFE) in its CLI bootstrap script that reconstructs strings to hide usage of 'http', 'child_process', 'JSON', 'eval', and 'spawn'. At runtime, it performs a JSON-RPC HTTP fetch, XOR-decodes the response, evaluates the decoded code, and spawns a detached child process running a second fetched payload. This process persists independently of the CLI session, establishing a persistent execution channel. The legitimate 'vite' package does not contain this behavior, indicating this is a dropper and backdoor malware embedded in the package.

Installing and running the '@vite-js/ui' package versions 7.15.10 or 7.15.16 can lead to execution of arbitrary, obfuscated code fetched from a remote server. This code runs with the privileges of the user invoking the package and establishes a persistent background process, potentially allowing remote attackers to maintain access and execute further malicious actions on the affected system.

No official patch or remediation is currently documented for '@vite-js/ui'. Users should avoid installing or running this package, especially versions 7.15.10 and 7.15.16. Verify package authenticity by using the official 'vite' package from trusted sources. Remove any installations of '@vite-js/ui' and investigate systems for the presence of the detached persistent processes spawned by this package. Monitor for unusual child processes and network activity related to this threat. Patch status is not yet confirmed — check the vendor advisory or trusted security sources for updates.