bigops-eslint

{"modified":"2026-08-05T01:44:24Z","published":"2026-08-05T01:44:24Z","schema_version":"1.7.4","id":"MAL-2026-12061","summary":"Malicious code in bigops-eslint (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (8a2b7c0da202027f856d059a571a04e01fd992845a158dcd01dfcd1bea4000bb)\nThe package advertises itself as an eslint helper but, on require() of index.js, unconditionally loads _helpers.js which fetches an OS-specific executable over HTTPS from string-concatenated hardcoded hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, and sdk/ext/pkg/net.dl.wel1.ru), with a DNS-TXT chunked base64 fallback channel over c.<domain> and numbered TXT records. The fetched bytes are written to /tmp or %TEMP% under disguised names (.cache_<rnd>, dotnet_diag_<rnd>.exe), chmodded 0755, and spawned detached via /bin/sh -c '<path> &' or cmd.exe /c start /b, with.unref() to survive the parent. Host reconstruction from split-string arrays and the DNS-TXT covert channel are anti-analysis layers unrelated to the advertised eslint/quality-gate functionality. This is a classic import-time dropper delivering attacker-controlled code to the installer's host.\n","affected":[{"package":{"ecosystem":"npm","name":"bigops-eslint"},"versions":["35.9.5"],"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":"_helpers.js","sha256":"23f5221b043a1e0deb1e79e409b81ee47ee85363a75492379eee0fe10bb4bd88","tlsh":"19a1b89a067630194bb097e4c7174815f65be66337808194f75ca5d81fb712883b2efc"}],"package_integrity":[{"filename":"bigops-eslint-35.9.5.tgz","hashes":{"sha1":"c8a71a9f4218ae4b95a8c9ae8116296be2563b8e","sha512_sri":"sha512-JxsMjzD+GvSLJFa++12DpUXeX0ExsYGEByDOVgBqb33FrW99z5zqpWFOXQ7Kb1oN5eu61V+CVcBEwRS+9mInlQ=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/bigops-eslint/v/35.9.5"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-011520","import_time":"2026-08-05T03:11:16.989423925Z","modified_time":"2026-08-05T01:44:24Z","sha256":"8a2b7c0da202027f856d059a571a04e01fd992845a158dcd01dfcd1bea4000bb","source":"amazon-inspector","versions":["35.9.5"]}]}}