bigops-shared-product-design

{"modified":"2026-08-07T12:34:19Z","published":"2026-08-07T12:34:19Z","schema_version":"1.7.4","id":"MAL-2026-13526","summary":"Malicious code in bigops-shared-product-design (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (1d8f6d857df9a0aa674b5354167a3eb1c28634b9e61a9436f19a9ffcb8a8b734)\nbigops-shared-product-design@35.9.3 ships _adapter.js, which is unconditionally loaded via index.js on require(). On load it fetches a platform-specific native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf101-a.workers.dev, cf99-9b3.workers.dev, cf100-416.workers.dev), with a DNS-TXT fallback that queries resolver domains under dl.wel1.ru (sdk./ext./pkg./net.). The fetched bytes are written to /tmp/.cache_<rand> on Unix or %TEMP%/dotnet_diag_<rand>.exe on Windows, chmod'd to 0755, and spawned detached via /bin/sh -c or cmd /c start. Destinations and resolver domains are assembled at runtime by joining fragmented string literals ([\"oob-worker.cf101-a\",\"df.workers.\",\"dev\"].join(\"\"), ['sdk.dl.wel1.r','u'].join(\"\"), require(\"child_\"+\"process\")) to evade static analysis. No hash pinning, no signature check, destinations unrelated to any documented publisher. A sibling module lib/telemetry.js contains the same download-chmod-spawn pattern with base64-decoded chunks, indicating a shared dropper toolkit. Masquerade filenames (dotnet_diag,.cache_<rand>), /tmp staging, detached spawn, and DNS-TXT chunked fallback are canonical dropper tradecraft.\n","affected":[{"package":{"ecosystem":"npm","name":"bigops-shared-product-design"},"versions":["35.9.3"],"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":"_adapter.js","sha256":"9abe1d794a370734bc41f7cc4a0654f5aa71aedb992a004d526985cb6ab979b1","tlsh":"4ba1875a067970198bb0dbe48717441af65be6933380c2d4fbac65945f7722483b2efc"},{"path":"lib/telemetry.js","sha256":"1964470ba6edc84ce37e840e74670ca89a8ca035ba2ccf03cca4e19fff779dc8","tlsh":"15835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"}],"package_integrity":[{"filename":"bigops-shared-product-design-35.9.3.tgz","hashes":{"sha1":"1ee9de76a09d794caea804a9e920b5be7783e0d7","sha512_sri":"sha512-ZjOit47Z4y4H9kALuHsNhARfEKpHqBz1zSxerg3cw9wqzaSKeRRpgl55fhqavId8vp7MijwMEAgW76J2RP8iTA=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/bigops-shared-product-design/v/35.9.3"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-017034","import_time":"2026-08-07T12:51:23.015114565Z","modified_time":"2026-08-07T12:34:19Z","sha256":"1d8f6d857df9a0aa674b5354167a3eb1c28634b9e61a9436f19a9ffcb8a8b734","source":"amazon-inspector","versions":["35.9.3"]}]}}