MAL-2026-6352 Malicious code in hex-conv-ae7a (npm)

The package's package.json declares a postinstall hook ("postinstall": "node run.js") that runs run.js automatically on npm install. run.js imports os, fs, http, https, and child_process and collects host identity and environment data including os.hostname(), os.userInfo(), os.platform(), process.env.USER, and process.cwd(), reads files from the filesystem (fs.readFileSync, fs.existsSync), base64-encodes payloads via Buffer.from(…).toString('base64'), and POSTs the result over http/https to a remote endpoint. This is the canonical install-time host-reconnaissance and exfiltration shape: a default npm install of this package automatically sends installer machine information off-host without any user interaction or documented purpose. The package name (hex-conv with a random hex suffix) is consistent with throwaway/disposable squatting infrastructure and the package has no legitimate library functionality matching this behavior.