{"id":"MAL-2026-17553","summary":"Malicious code in css-ikomdq-polyfill (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (255cceca3ca8631c9b225745c5b64a71fd6c09b60fa3ad95b419fccb66f035f2)\nThe package presents itself as a CSS polyfill but ships thunderboltRegistry.js, which on require() executes a top-level IIFE that runs id, whoami, uname -a, ifconfig/ip addr, and reads /etc/hosts via child_process.execSync, then posts the command outputs together with hostname, node version, platform, and pid to the hardcoded plain-HTTP endpoint http://dxpoc.gt.tc/callback.php/ using fetch. The module also deletes its own entries from require.cache so the payload re-runs on each require() rather than being memoized. The package name and the thunderbolt/editor/corvid Proxy facade impersonate Wix parastorage registry modules to encourage accidental installation.\n","modified":"2026-10-05T04:15:05.210715241Z","published":"2026-10-05T03:36:15Z","database_specific":{"malicious-packages-origins":[{"modified_time":"2026-10-05T03:36:15Z","sha256":"255cceca3ca8631c9b225745c5b64a71fd6c09b60fa3ad95b419fccb66f035f2","source":"amazon-inspector","versions":["1.0.0"],"id":"IN-MAL-2026-021018","import_time":"2026-10-05T03:57:39.10921433Z"}]},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/css-ikomdq-polyfill/v/1.0.0"}],"affected":[{"package":{"name":"css-ikomdq-polyfill","ecosystem":"npm","purl":"pkg:npm/css-ikomdq-polyfill"},"versions":["1.0.0"],"database_specific":{"indicators":{"package_integrity":[{"filename":"css-ikomdq-polyfill-1.0.0.tgz","hashes":{"sha1":"b83a62107dde2ec224c350e1e870a46461948d87","sha512_sri":"sha512-jRUk8onAmbjznZi/Iq1AFTAd+snjNFq2dqcY7elLWRhEwVFqdaG+pEeN84bKV9r+UF3jbWNOqI1m1VtVO47eHQ=="}}],"evidence_files":[{"tlsh":"e87154a5b99df02065c33438cb7f4049b4bbc6672d6caee0744899b01f7985c01be6f8","path":"thunderboltRegistry.js","sha256":"a485cb48081ea590cab385a405886cfe6f30af7d415f30bc8d7937ace461b928"}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/css-ikomdq-polyfill/MAL-2026-17553.json","cwes":[{"description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code","cweId":"CWE-506"}]}}],"schema_version":"1.9.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}