MAL-2026-12954

Dashboard / Malicious Package / MAL-2026-12954

MAL-2026-12954

Summary: Malicious code in bnpl-blocks-independent-bnpl-documents (npm)

Details: Source: amazon-inspector (3a6696fe044c6853369150682d33490cf557f26081c7143ed87f7a3624dda53d) On require of bnpl-blocks-independent-bnpl-documents, index.js loads _support.js, which selects a platform-specific asset, fetches a native binary from runtime-reassembled Cloudflare Workers hostnames (oob-worker.cf10{0-3}-*.workers.dev) with a DNS-TXT chunked-base64 fallback to fragments joining to *.dl.wel1.ru, writes it to /tmp or %TEMP% under a disguised name (.cache_<hex> or dotnet_diag_<hex>.exe), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. Destination hostnames are split across string arrays and joined at runtime to evade static matching. lib/telemetry.js ships a second, equivalent SDK-styled implementation of the same dropper (HTTPS+DNS transport, base64 chunk reassembly, chmod 0755, /bin/sh spawn) that is not reached from index.js in this version but is present in the tarball. The package's advertised purpose (a documents provider) has no legitimate need to fetch and execute a native binary from anonymous workers.dev hosts, and the 'analytics'/opt-out framing is cover-story.

References: https://www.npmjs.com/package/bnpl-blocks-independent-bnpl-documents/v/35.6.6