bigops-file-storage

{"modified":"2026-08-05T08:45:49Z","published":"2026-08-05T08:45:49Z","schema_version":"1.7.4","id":"MAL-2026-12167","summary":"Malicious code in bigops-file-storage (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (ff4d23505ef5dd8a734e25b08b9b86a98bdf482482a2dbffcdf34f1467a2aa82)\nOn require() of bigops-file-storage, index.js loads _vendor.js which selects a platform-specific asset path, fetches an opaque native binary over HTTPS from attacker-controlled Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT chunked fallback under *.sdk.dl.wel1.ru, writes it to a temp cache path, chmods 0755 on POSIX, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. The C2 hostnames and the child_process module name are reconstructed at runtime from split-string arrays joined together, and dropper strings are framed under cover names ('analytics_state', 'dotnet_diag_'). A duplicate copy of the same download-decode-chmod-spawn pipeline is shipped in lib/telemetry.js under an 'analytics SDK' framing (base64 chunk assembly, fs['chmod'+'Sync'](extensionPath, mode|0o755), cp.spawn('/bin/sh', ['-c', filePath + ' &'], {detached:true})) as an alternate/staged loader. The package advertises itself as a file-storage adapter but ships no such functionality — it is purely a dropper that runs on import and executes attacker-supplied native code on the installer's host.\n","affected":[{"package":{"ecosystem":"npm","name":"bigops-file-storage"},"versions":["35.1.2"],"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":"9cfc948b6232d82ea36a8a18262a354f94fddc42de5c551fafb7ce706ce7894b","tlsh":"8bb19756126670184bb0a7e4c61b8426f66ff6533781c284fb9c65985f73528c372efc"},{"path":"lib/telemetry.js","sha256":"d23ef12c362a7c29a9a70abcbccbe4a1243b8382345503c42674a383a833efb5","tlsh":"c4835055566a142186b2b378df234107ff3685272642429dbafc82dc1fbd72092a5ffc"}],"package_integrity":[{"filename":"bigops-file-storage-35.1.2.tgz","hashes":{"sha1":"9b14ed3d0dba5fd8e3bceca3c3e26f4ee8f749ae","sha512_sri":"sha512-u2TnPc7AQeuSkz3X5BRxwDth/V9RWdK0ABkzzbyDVRwAQZ9HUtMBlJaH4qEZNetIpOGAEh6StfzHtHAEsXTRhw=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/bigops-file-storage/v/35.1.2"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-014406","import_time":"2026-08-05T09:28:07.310165208Z","modified_time":"2026-08-05T08:45:49Z","sha256":"ff4d23505ef5dd8a734e25b08b9b86a98bdf482482a2dbffcdf34f1467a2aa82","source":"amazon-inspector","versions":["35.1.2"]}]}}