twilio-internal

{"schema_version":"1.7.4","id":"MAL-2026-10934","published":"2026-07-20T00:00:00Z","modified":"2026-08-05T07:08:56.351639527Z","summary":"Malicious code in twilio-internal (npm)","details":"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.\n\nThe 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.\n\nThe 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.\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (539f7f248130c1d45914d85f04e43508d482fbf5a3622a840191dbfa18086c19)\nThe 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.\n","affected":[{"package":{"name":"twilio-internal","ecosystem":"npm"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"versions":["99.99.99","99.99.100"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"},{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"},{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"index.js","sha256":"1e53f49081bcfa36cb83abaa9fcfdec5b1ef99d515f40a766b0de9e1e5d03f09","tlsh":"5f1148f553f5ad700bb59384b18aac1553b3f01473079cf099d851652bd827425f26f9"},{"path":"package.json","sha256":"57eca8d6e2b8d92f28fdb4cb292a250368e8033aa6ef6e70994b48daf1a4d3e0","tlsh":"d8c08c701c229b7334c80b96087a944922e20d2f4104a80507832110a1d927388ff30d"}],"package_integrity":[{"filename":"twilio-internal-99.99.99.tgz","hashes":{"sha1":"0a6478629631416a2e5b00db93bc330b1785a693","sha512_sri":"sha512-gQ1CoSrr7e1l/f4RoO/UTFxxh9KtS6+hUnYa8f+gobX/1l93w1GrQ9scFqKUZBWW5RDtIGbPflVESX+Ma58V4w=="}}]},"iocs":{"domains":["webhook.site","2b22ede784d5.oast.fun"],"urls":["https://webhook.site/42ce0f0e-a0a0-41b5-b157-1c0f918e064f"]}}}],"references":[{"type":"WEB","url":"https://www.npmjs.com/package/twilio-internal"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/twilio-internal/v/99.99.99"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/twilio-internal/v/99.99.100"}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-011023","import_time":"2026-08-04T21:33:14.086094081Z","modified_time":"2026-08-04T21:21:13Z","sha256":"539f7f248130c1d45914d85f04e43508d482fbf5a3622a840191dbfa18086c19","source":"amazon-inspector","versions":["99.99.99"]},{"id":"IN-MAL-2026-013304","import_time":"2026-08-05T07:06:40.463730899Z","modified_time":"2026-08-05T06:04:01Z","sha256":"eb471dee741de6675b4506a2c078bd4026468a8850da5448edd76acb756d6f1b","source":"amazon-inspector","versions":["99.99.100"]}]},"credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"},{"name":"SafeDep","contact":["https://safedep.io"],"type":"FINDER"}]}