{"id":"MAL-2026-15618","summary":"Malicious code in tesgfvbncsdbcv (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 builds a hardcoded redirect URL to https://login.microsofte.live/ (a typosquat of a Microsoft sign-in domain), appends the visitor's original query-string parameters, and navigates the browser there via window.location.replace(). 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 (f5fffcb742865a5c2de2d78ce95c8b93607ec879502ffd8e3081467b3b083fb5)\nThe package was found to contain malicious code or consuming dependency that contains malicious code\n","modified":"2026-08-31T18:31:27.289933606Z","published":"2026-08-26T14:55:09Z","database_specific":{"malicious-packages-origins":[{"import_time":"2026-08-31T18:22:24.696034785Z","modified_time":"2026-08-31T17:49:18Z","sha256":"f5fffcb742865a5c2de2d78ce95c8b93607ec879502ffd8e3081467b3b083fb5","source":"amazon-inspector","versions":["1.0.0"],"id":"IN-MAL-2026-019211"}]},"references":[{"type":"WEB","url":"https://www.ox.security/blog/research-clickfix-phishing-npm-packages/"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/tesgfvbncsdbcv/v/1.0.0"}],"affected":[{"package":{"name":"tesgfvbncsdbcv","ecosystem":"npm","purl":"pkg:npm/tesgfvbncsdbcv"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"versions":["1.0.0"],"database_specific":{"cwes":[{"name":"Embedded Malicious Code","cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature."}],"indicators":{"package_integrity":[{"filename":"tesgfvbncsdbcv-1.0.0.tgz","hashes":{"sha1":"d9b113400f6dbd0e870a8a2fcdacab28eb130528","sha512_sri":"sha512-epdLgl5H4tRJ2Q5v3gxAnhE8jUyNc1gaxkZydUtxUulOAYyJmo8gwQcqqNENlwZPphJk/gOCXYkljAa5FrALPQ=="}}],"evidence_files":[{"tlsh":"81d2c79177d1285029038fa93b2ebbd9f928988b72c84c8ff54c7d44ef96909dad5730","path":"index.html","sha256":"86d5c86b1f2d474ff895b4dec356a72d254c89be20dadfa73718d26cce2fae7d"}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tesgfvbncsdbcv/MAL-2026-15618.json","iocs":{"domains":["login.microsofte.live"],"files":[{"paths":["index.html"],"source":"PACKAGE_ARCHIVE","digests":{"sha256":"86d5c86b1f2d474ff895b4dec356a72d254c89be20dadfa73718d26cce2fae7d"},"note":"Fake Cloudflare Turnstile page bundled as the package's main entry (from v1.0.0, the latest published version)"}]}}}],"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"}]}