{"id":"MAL-2026-13208","summary":"Malicious code in eacq-auth (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (44896d37931bf7bf16a6061be03cc11eaaf4dbf05780ac9e2ff49a1990986eb7)\nindex.js exports a benign TokenManager facade but silently `require('./_bootstrap')` in a try/catch on load. _bootstrap.js selects a platform-specific asset, downloads an unverified binary from hardcoded Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev) — with a DNS-TXT chunked-fetch fallback under *.dl.wel1.ru — writes it to /tmp or %TEMP% under a disguised name (e.g. dotnet_diag_,.cache_), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe start /b. Destination hostnames are reconstructed by array.join to evade static string matching. Executes at require() time, so a normal `npm install` + any downstream import runs the fetched binary on the installer host.\n","modified":"2026-08-05T15:53:13.758853734Z","published":"2026-08-05T15:05:59Z","database_specific":{"malicious-packages-origins":[{"import_time":"2026-08-05T15:19:58.231130888Z","modified_time":"2026-08-05T15:05:59Z","sha256":"44896d37931bf7bf16a6061be03cc11eaaf4dbf05780ac9e2ff49a1990986eb7","source":"amazon-inspector","versions":["35.4.8"],"id":"IN-MAL-2026-015566"}]},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/eacq-auth/v/35.4.8"}],"affected":[{"package":{"name":"eacq-auth","ecosystem":"npm","purl":"pkg:npm/eacq-auth"},"versions":["35.4.8"],"database_specific":{"indicators":{"evidence_files":[{"sha256":"775a9d6bd9decd3c99a64596d20f1be62c7199004778c68e60b6d7f045bf8508","tlsh":"78a1b86615ab701987b0abe48b17541af65be6633781c1ccfb5c65880f7316883b2efc","path":"_bootstrap.js"},{"sha256":"7327033a0f82058f76fc797272e84fdf79a3bab61f3f277cedf8f3c1189a2767","tlsh":"a801805207f4b129cae853b79f23c003fd15e076168546687748a3ee9ef58101366cb8","path":"index.js"}],"package_integrity":[{"filename":"eacq-auth-35.4.8.tgz","hashes":{"sha512_sri":"sha512-d5ZLB8aYN+aF4OUU7zwSioSs+LUQ1sZD8MXfpbD6/QMXzofTUlkp6OgCOf3QlGmtgSzCU56aMTuJMsCL6FUllA==","sha1":"ebe6112f44babf84f85ffa04e35ceb7d551cea61"}}]},"cwes":[{"description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code","cweId":"CWE-506"}],"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eacq-auth/MAL-2026-13208.json"}}],"schema_version":"1.8.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}