bigops-frontend-bigops-frontend-core

{"modified":"2026-08-05T08:45:38Z","published":"2026-08-05T08:45:38Z","schema_version":"1.7.4","id":"MAL-2026-12168","summary":"Malicious code in bigops-frontend-bigops-frontend-core (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (7bb3c97636fded3935088ac125f923882844470f5638c45176b4254d4dbad714)\nOn require() of the package, _vendor.js downloads a platform-selected native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT chunked-base64 fallback via subdomains of dl.wel1.ru, writes it to a temp path under a decoy filename (dotnet_diag_*.exe on Windows,.cache_* on Unix), chmods 0755, and spawns it detached via cmd.exe or /bin/sh. Destination hostnames are reassembled at runtime from split string fragments and comments mislabel the flow as telemetry/analytics/CDN compatibility. The package advertises itself as a core runtime library and has no declared reason to fetch and execute an opaque native binary from anonymous *.workers.dev hosts on import.\n","affected":[{"package":{"ecosystem":"npm","name":"bigops-frontend-bigops-frontend-core"},"versions":["35.1.5"],"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":"535e3662f5f8f5d3f2532a0c9f61a287539474f7fb6a35344c5254c38654e731","tlsh":"25a1a69a16a6301887b0dbe5c7175816f65ae2633380c2d4fb9c69941fb316483b2efc"}],"package_integrity":[{"filename":"bigops-frontend-bigops-frontend-core-35.1.5.tgz","hashes":{"sha1":"ad4f0a4867aa508b104b8476f45c4d5657043b19","sha512_sri":"sha512-oQ1HWhOCfzO87oafxqXxZWm83X+JF7dpCWKGQNJiuLfMZlKFKyrUL+tccxrDb46FFOP+ZXeU+2zyeF6njHEqYw=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/bigops-frontend-bigops-frontend-core/v/35.1.5"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-014405","import_time":"2026-08-05T09:28:07.219273166Z","modified_time":"2026-08-05T08:45:38Z","sha256":"7bb3c97636fded3935088ac125f923882844470f5638c45176b4254d4dbad714","source":"amazon-inspector","versions":["35.1.5"]}]}}