bigops-call-history

{"modified":"2026-08-05T08:44:35Z","published":"2026-08-05T08:44:35Z","schema_version":"1.7.4","id":"MAL-2026-12154","summary":"Malicious code in bigops-call-history (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (c1ad22f3108b03b9f6e2e6ec2a7582e185694e93a6b84ee815182a224202754c)\nThe package's index.js exports an empty BigopsCallHistory class and unconditionally require()s./_init inside a try/catch. On any require or import, _init.js runs a top-level setup() that downloads a platform-specific executable from Cloudflare Workers hosts whose names are reconstructed at runtime from split-array joins (oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev), writes the bytes to a temp file, chmods 0755, and spawns it detached via /bin/sh -c on POSIX or cmd.exe /c start /b on Windows. If HTTPS mirrors fail, a resolveDns() routine queries TXT records under *.dl.wel1.ru (c.<domain>, then 0.<domain>..N.<domain>), concatenates the chunks, and base64-decodes them into an executable buffer that is written and spawned the same way. The dropped file uses cover-story names (dotnet_diag_*.exe,.cache_*, analytics_state marker). Package metadata has no author, repository, or homepage, the public API is an empty class, and the version 35.8.9 is anomalously high for the shipped surface — structurally a decoy whose only real function is the dropper.\n","affected":[{"package":{"ecosystem":"npm","name":"bigops-call-history"},"versions":["35.8.9"],"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":"_init.js","sha256":"098d4a82305f03c01ba3c58ec9407d4ba083b481273ab96b20f456b9611c840b","tlsh":"bfb1b4aa126a71188b70ebe4c71b5416f56af6533380c684f69c59941fb31348372efc"},{"path":"package.json","sha256":"77ece339375f64e47facf3360af55082a3193004ae3fe954dc087e8a314f4eef","tlsh":"aec0221b4060b5330cb157b04c62058737820f1f11368d0b39b7201c00b08b2889c322"}],"package_integrity":[{"filename":"bigops-call-history-35.8.9.tgz","hashes":{"sha1":"83f9fa1ddd59acac767cd24a6c0cb181e1e8076e","sha512_sri":"sha512-WPkzoDPnLEnYeMY3cXz5SUzzpJLlZW3D6ttsIDWHpd4WwIM68oicaMPgw2GPfsl0qg3rY3hVgrhFHiB9WqCpeg=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/bigops-call-history/v/35.8.9"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-014398","import_time":"2026-08-05T09:28:06.336883547Z","modified_time":"2026-08-05T08:44:35Z","sha256":"c1ad22f3108b03b9f6e2e6ec2a7582e185694e93a6b84ee815182a224202754c","source":"amazon-inspector","versions":["35.8.9"]}]}}