MAL-2026-10934

The twilio-internal package is one of four byte-identical dependency-confusion squats of Twilio's npm namespace published by user 'yuva2210' (maintainer email charankumarj2004@gmail.com), all at the sentinel version 99.99.99 chosen to outrank any internal/private version and win resolution against a private registry. The npm description is empty and the package provides no legitimate functionality; the name mimics a plausible internal Twilio package so that a misconfigured resolver installs this public lookalike instead of the intended private dependency.

The package declares a postinstall hook ("node index.js") that executes automatically on a bare npm install with no consent gate. The bundled index.js payload (1,185 bytes, sha256 prefix c324d579006df4c5, identical across all four packages) performs environment reconnaissance: it collects the npm package name and version, os.hostname(), the OS username (os.userInfo().username), the home directory path (os.homedir()), the current working directory, os.platform(), os.arch(), NODE_ENV, and the CI flag. It serializes this to JSON and exfiltrates it via HTTPS POST to a hardcoded anonymous dead-drop at https://webhook.site/42ce0f0e-a0a0-41b5-b157-1c0f918e064f (the same collector UUID across all four packages). On request error the payload falls back to a redundant out-of-band callback to 2b22ede784d5.oast.fun over HTTP, ensuring the beacon lands even where HTTPS egress to webhook.site is blocked; errors on that path are swallowed.

The collected cwd/homedir/username/CI/NODE_ENV set is reconnaissance targeting internal build environments and their filesystem layout. All four packages (twilio-serverless, twilio-assets, twilio-deploy, twilio-internal) were published by the same maintainer with an identical payload and the same collector endpoint.

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## Source: amazon-inspector (539f7f248130c1d45914d85f04e43508d482fbf5a3622a840191dbfa18086c19) The package's postinstall script runs index.js on npm install and collects host reconnaissance data — os.hostname(), os.userInfo().username, os.homedir(), process.cwd(), os.platform(), architecture, and selected environment variables — then POSTs the collected data to a hardcoded collector at webhook.site/42ce0f0e-a0a0-41b5-b157-1c0f918e064f. On request failure the code triggers a DNS/HTTP callback to 2b22ede784d5.oast.fun (interactsh) as an out-of-band beacon. The package name 'twilio-internal' combined with version 99.99.99 and empty metadata is consistent with a dependency-confusion lure targeting a private Twilio internal package namespace; installing it results in exfiltration of installer host identifiers to attacker-controlled infrastructure at install time.