{"id":"MAL-2026-15607","summary":"Malicious code in mbxcnsuwgs1 (npm)","details":"Published as part of a ClickFix-style fake-CAPTCHA phishing campaign documented by OX Security (see reference). The package's only file is index.html, declared as the npm \"main\" entry; package.json defines no preinstall/install/postinstall/prepare lifecycle script, so the payload does not execute at `npm install` time. index.html renders a fake Cloudflare Turnstile verification widget. An obfuscator.io-obfuscated inline script POSTs a hardcoded per-package \"hostKey\" to https://api.keyval.org/get, receives a base64-encoded IV:ciphertext pair, decrypts it client-side via the Web Crypto API (AES-CTR) using an embedded key to obtain a redirect URL, appends the visitor's original query-string parameters, and navigates the browser there via window.location.replace(). This \"dead drop\" design lets the operator change the phishing destination for every package sharing a hostKey without republishing to npm; OX Security observed keyval.org-served destinations including a typosquatted Microsoft login page and, at time of writing, a ChatGPT redirect. The package therefore does not attack the installing machine directly; it is used as a static file host on the npm CDN (e.g. unpkg/jsDelivr) so the index.html can be linked to and opened directly in a victim's browser as a phishing/ClickFix landing page. Published by npm user \"johnvaldez9a\" as part of a burst of near-identical single-purpose packages published between 2026-08-04 and 2026-08-24 that share this same fake-Turnstile-redirect page structure.\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (1dcbd9c1d41f7cb0f208e9d3a855f7b72b87b24e05fb0831554b57d5bfbe7a07)\nThe package was found to contain malicious code or consuming dependency that contains malicious code\n","modified":"2026-08-31T18:31:23.939618548Z","published":"2026-08-26T14:55:09Z","database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-019278","import_time":"2026-08-31T18:22:28.029524439Z","modified_time":"2026-08-31T17:58:32Z","sha256":"1dcbd9c1d41f7cb0f208e9d3a855f7b72b87b24e05fb0831554b57d5bfbe7a07","source":"amazon-inspector","versions":["1.0.0"]}]},"references":[{"type":"WEB","url":"https://www.ox.security/blog/research-clickfix-phishing-npm-packages/"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/mbxcnsuwgs1/v/1.0.0"}],"affected":[{"package":{"name":"mbxcnsuwgs1","ecosystem":"npm","purl":"pkg:npm/mbxcnsuwgs1"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"versions":["1.0.0"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mbxcnsuwgs1/MAL-2026-15607.json","indicators":{"package_integrity":[{"filename":"mbxcnsuwgs1-1.0.0.tgz","hashes":{"sha512_sri":"sha512-3YeWigI6sKU663mmAV6db/Z4DxQ8rELYLedp4iIUszAEUaWAbCIO868pQacLYct6Yq7/3zndf8zhll9GH739Wg==","sha1":"55e36225512a655f8279dc1134937cb0cbc36661"}}]},"iocs":{"domains":["api.keyval.org"],"files":[{"digests":{"sha256":"b2434adc2b108f96922d167f47141cf12acba1ceff7ef2dea74916bb5488d907"},"note":"Fake Cloudflare Turnstile page bundled as the package's main entry (from v1.0.0, the latest published version)","paths":["index.html"],"source":"PACKAGE_ARCHIVE"}]}}}],"schema_version":"1.9.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"},{"name":"OX Security","contact":["https://www.ox.security/"],"type":"FINDER"}]}