claims-get-indexed-selector

{"modified":"2026-08-05T14:06:00Z","published":"2026-08-05T14:06:00Z","schema_version":"1.7.4","id":"MAL-2026-12621","summary":"Malicious code in claims-get-indexed-selector (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (fe924c35590524d1632020cce8e08d68b232aa0d53b0f0ecb730f3ae87e07c35)\nclaims-get-indexed-selector@35.8.7 executes a binary dropper on module load. index.js unconditionally requires _polyfill.js, which reassembles network destinations from split string arrays (hosts on cf*.workers.dev and *.dl.wel1.ru), downloads a native binary over HTTPS, writes it to /var/tmp/.cache_<hex> or TEMP\\dotnet_diag_<hex>.exe with cover-story filenames, chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. If HTTPS retrieval fails, a covert DNS-TXT channel is used: a chunk-count TXT record at c.<domain> and base64-encoded payload chunks at <i>.<domain> are fetched and reassembled into the executable. No hash or signature verification is performed on the fetched binary. Destination hostnames are constructed from split arrays such as [\"oob-worker\",\".cf103-070.\",\"workers.\",\"de\",\"v\"].join(\"\") to evade static string scanning. The package is presented as a benign runtime support module; the delivered binary is opaque and the destinations are attacker-controlled.\n","affected":[{"package":{"ecosystem":"npm","name":"claims-get-indexed-selector"},"versions":["35.8.7"],"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":"7c823ab3268fe994e0fdf7e7d0be9883b0bd75fce706abcaddd1e540ad730f1d","tlsh":"20b1a75a116670198bb0e7e4c717581af66af6637380c6d8fb5c55880f7712883b2efc"}],"package_integrity":[{"filename":"claims-get-indexed-selector-35.8.7.tgz","hashes":{"sha1":"4edcb830138a61fa4e318c8ac56cb1aa6308d0f9","sha512_sri":"sha512-Ugwqk/DCrstfk9vKlzvFlH6E/8g2JEveNyNLOlBTbli2Yr3nfXSUy4I3knsL9nfGrW9u4Vg/maSO1r8k6HhnCA=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/claims-get-indexed-selector/v/35.8.7"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-015163","import_time":"2026-08-05T14:20:08.457516187Z","modified_time":"2026-08-05T14:06:00Z","sha256":"fe924c35590524d1632020cce8e08d68b232aa0d53b0f0ecb730f3ae87e07c35","source":"amazon-inspector","versions":["35.8.7"]}]}}