{"schema_version":"1.8.0","id":"MAL-2026-13225","published":"2026-08-05T15:37:40Z","modified":"2026-08-05T16:50:00.935638334Z","summary":"Malicious code in bigops-nitro-client (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (bfbd116994566a3e99f61697a738787d8089c2c99dbc9d5c55f9f3902a6b8cff)\nOn require(), index.js loads _vendor.js which downloads a platform-specific native binary from rotating Cloudflare Workers endpoints (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT chunked base64 fallback channel via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched binary is written to /tmp or %TEMP% under disguised names (dotnet_diag,.cache), chmod 0755, and spawned detached via spawn('/bin/sh', ['-c', <path> + ' &']) or spawn('cmd',...). Host names are assembled at runtime from split string arrays joined with.join('') to evade static host scanning. The package presents itself as a trivial stub client and has no legitimate need for a native binary download or execution.\n","affected":[{"package":{"name":"bigops-nitro-client","ecosystem":"npm","purl":"pkg:npm/bigops-nitro-client"},"versions":["35.6.1"],"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":"_vendor.js","sha256":"f364f460a233b86354de41818aa9bc0f39934cb14ed69ab0a00ad7dfc3a7978e","tlsh":"14b1859a15b670198bb0d7f487175416f69ae6a33380c198fb5ca8981f7712483b2dfc"}],"package_integrity":[{"filename":"bigops-nitro-client-35.6.1.tgz","hashes":{"sha1":"c00357925840314f2fef65d2b239676d75c84c02","sha512_sri":"sha512-sRmwtu6Qvo3XdutDZODSNbDUeY4GfYcek/PGWuIFv2h9UzCLKs2ST63v/AHJ+3VFbx/CUMEbpJbhw37gfU6nHA=="}}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-nitro-client/MAL-2026-13225.json"}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/bigops-nitro-client/v/35.6.1"}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-015771","import_time":"2026-08-05T16:13:43.357699057Z","modified_time":"2026-08-05T15:37:40Z","sha256":"bfbd116994566a3e99f61697a738787d8089c2c99dbc9d5c55f9f3902a6b8cff","source":"amazon-inspector","versions":["35.6.1"]}]},"credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}