Details
The twilio-deploy 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 (64b1e3e96271384ceafb277978fe65ca3e89fd42bc59fbc82e5c17be66e0ba31) Package name typosquats 'twilio' and is published at version 99.99.99, the classic dependency-confusion shape used to intercept internal-package resolution. On npm install, the declared postinstall hook runs index.js, which collects host and user identifiers (os.hostname(), os.userInfo().username, os.homedir(), cwd, os.platform(), os.arch(), npm_package_name, npm_package_version, NODE_ENV, and CI environment variables) and POSTs them as JSON to a hardcoded https://webhook.site/42ce0f0e-a0a0-41b5-b157-1c0f918e064f collector, with a fallback GET to 2b22ede784d5.oast.fun as an out-of-band callback. The destination is not configured by the installer and is unrelated to the Twilio publisher; the effect is automatic reconnaissance beacon on any machine that installs the package.