bigops-create-manifest

{"modified":"2026-08-05T01:35:33Z","published":"2026-08-05T01:35:33Z","schema_version":"1.7.4","id":"MAL-2026-12037","summary":"Malicious code in bigops-create-manifest (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (027d25851cc38da61b10c0ce1d722d3e8455826d2f7866474432e98dd8f1b806)\nOn require, index.js loads _polyfill.js which selects a platform-specific endpoint, downloads an opaque native binary over HTTPS from one of several Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT covert-channel fallback that reads base64-encoded chunks from sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to a randomized filename disguised as dotnet_diag_<hex>.exe on Windows or.cache_<hex> under /var/tmp on Unix, chmod 0755, and spawned detached via /bin/sh -c or cmd. C2 hostnames and resolver domains are assembled at runtime via split-string array joins; artifact naming, an analytics_state marker, and DISABLE_TELEMETRY env checks frame the operation as diagnostics. The package's advertised purpose (a manifest wrapper) has no need for downloading and executing a native binary from third-party infrastructure.\n","affected":[{"package":{"ecosystem":"npm","name":"bigops-create-manifest"},"versions":["35.2.4"],"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":"_polyfill.js","sha256":"4a0b469a1ee7e087dae0e187924dc54c24aa734fb93d1478d5e942502b4cb3e0","tlsh":"19b1a69a026670154b70e7e4c71b481af55af6633781c298f75c65984fb352483b2efc"}],"package_integrity":[{"filename":"bigops-create-manifest-35.2.4.tgz","hashes":{"sha1":"f71c48100997ed951c00e9d08a5b879b3dd6fc46","sha512_sri":"sha512-kxsC9iagMwEykN3VS7yTxaoCDhSWK47UcrJ7JNIzapHVtvyP3/FYtpqiDOyi4GpNQhquT3Le7OAmtj4dHBgEPw=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/bigops-create-manifest/v/35.2.4"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-011505","import_time":"2026-08-05T01:39:31.959956153Z","modified_time":"2026-08-05T01:35:33Z","sha256":"027d25851cc38da61b10c0ce1d722d3e8455826d2f7866474432e98dd8f1b806","source":"amazon-inspector","versions":["35.2.4"]}]}}