{"id":"MAL-2026-12904","summary":"Malicious code in bnpl-blocks-atom-icon-loader (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (de37ae50b4a6878a2719938fddc4c705e82cbbc33d3d85dbe59462d91f0d53c5)\nOn require of the package, index.js unconditionally loads _compat.js, which selects a platform-specific output path (Linux/Darwin: /tmp/.cache_\u003crand\u003e; Windows: TEMP/dotnet_diag_\u003crand\u003e.exe), downloads an opaque binary via https.get from one of several Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev), writes it to disk, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. Destination hostnames are assembled at runtime by joining split string fragments (e.g. ['oob','-worker.cf99-9b3.workers.dev'].join(''); ['sdk.dl.w','el','1.r','u'].join('')) to evade static URL scanning, and a DNS-TXT chunked base64 fallback channel targets sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. Cover-story comments referencing SHA-256 integrity checks, CI skipping, and exponential backoff appear in code that implements none of that logic. The dropped Windows artifact is named dotnet_diag_\u003crand\u003e.exe to masquerade as a Microsoft diagnostic tool. No signature verification, no pinning, no publisher-matching source.\n","modified":"2026-08-05T15:50:50.882614283Z","published":"2026-08-05T14:51:42Z","database_specific":{"malicious-packages-origins":[{"sha256":"de37ae50b4a6878a2719938fddc4c705e82cbbc33d3d85dbe59462d91f0d53c5","source":"amazon-inspector","versions":["35.4.7"],"id":"IN-MAL-2026-015471","import_time":"2026-08-05T15:19:53.228935222Z","modified_time":"2026-08-05T14:51:42Z"}]},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/bnpl-blocks-atom-icon-loader/v/35.4.7"}],"affected":[{"package":{"name":"bnpl-blocks-atom-icon-loader","ecosystem":"npm","purl":"pkg:npm/bnpl-blocks-atom-icon-loader"},"versions":["35.4.7"],"database_specific":{"cwes":[{"description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code","cweId":"CWE-506"}],"indicators":{"evidence_files":[{"sha256":"f1ed382d41c246c2310b2c878e6f6f73508682fdb196185ba2bc23e04d93906b","tlsh":"79b1875a06aa701847b097e48717441af65bf6633780c6d8f75ca9981fb7124c3b2efc","path":"_compat.js"}],"package_integrity":[{"hashes":{"sha1":"eb30d9736ce202a8e5a5075ebb6a79a6e177f162","sha512_sri":"sha512-tv8lr0m0l2FMxuD6M2TTD9CIz1JKb29F5mNR1gqeO97kA/UEFsQWWpvBJ8b6Rj1RE37VaJKhgnlk6N8MhF7hcw=="},"filename":"bnpl-blocks-atom-icon-loader-35.4.7.tgz"}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-icon-loader/MAL-2026-12904.json"}}],"schema_version":"1.8.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}