twilio-platform-async-data-fetch@99.99.99

The twilio-platform-async-data-fetch package is a dependency-confusion squat of Twilio's npm namespace published by user 'yuva2210' (maintainer email charankumarj2004@gmail.com) at sentinel versions 99.99.99 and 99.99.100, 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. It belongs to the same campaign as the actor's twilio-serverless/twilio-assets/twilio-deploy/twilio-internal squats and beacons to the same webhook.site collector. The package declares a postinstall hook ("node index.js") that executes automatically on a bare npm install with no consent gate. The index.js payload performs environment reconnaissance: it collects the npm package name (npm_package_name), os.hostname(), the OS username (os.userInfo().username), and the current working directory, serializes them to JSON, and exfiltrates the bundle via HTTPS POST to a hardcoded anonymous dead-drop at https://webhook.site/42ce0f0e-a0a0-41b5-b157-1c0f918e064f. Request errors are swallowed so the install appears to succeed. Two iterations were published: version 99.99.99 (payload 494 bytes, sha256 prefix 0ec56ada88db35b6) beacons only to the webhook.site collector, while version 99.99.100 (payload 688 bytes, sha256 prefix cebf45a0feba28b3) additionally beacons to a redundant out-of-band callback at 8060h91v8p1bvvr24e3r8s3z4qahy7mw.oastify.com, ensuring the reconnaissance lands even where HTTPS egress to webhook.site is blocked. Both payloads are byte-identical across all four packages in this sub-cluster (twiliointernal-messaging-toolbox, org-twilio-phone-numbers-utils, twilio-platform-request, twilio-platform-async-data-fetch). --- ## Source: amazon-inspector (4b905287a9c9f6af788103656cdaf26c800598871efc5004670533c0033a322c) twilio-platform-async-data-fetch@99.99.100 is a typosquat/dependency-confusion lure. Its package.json postinstall hook auto-runs index.js on `npm install`, which collects the installer's hostname (os.hostname()), username (os.userInfo().username), current working directory, and package name, then POSTs the JSON to two hardcoded out-of-band endpoints: https://webhook.site/42ce0f0e-a0a0-41b5-b157-1c0f918e064f and https://8060h91v8p1bvvr24e3r8s3z4qahy7mw.oastify.com (a Burp Collaborator subdomain). The version number (99.99.100) and Twilio-adjacent naming are consistent with dependency-confusion reconnaissance targeting an internal package name. Installer host identifiers leave the machine to attacker-controlled infrastructure at install time with no consent.