Malicious code in sme-rko-finance-front-operations-special-payments (npm)

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Source: amazon-inspector (3a7bfbc55631ce8b054b20444bf1e335244c998fcf00d1709f951b1afa4cb242)

On require() of the package, index.js loads support.js which downloads a platform-specific binary from string-concatenated cloudflare workers.dev subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS TXT chunked-transfer fallback to *.dl.wel1.ru. The payload is written to /tmp with a hidden name (.cache) or to %TEMP% as dotnet_diag_.exe on Windows, chmodded 0755, and spawned detached via /bin/sh -c or cmd. The declared main module lib/telemetry.js contains a duplicate dropper path under an 'analytics SDK' cover story, base64-decoding transport chunks before executing the resulting binary the same way. C2 host names and dangerous API names (child_process, chmodSync) are constructed at runtime via array-join and string concatenation to defeat static analysis. Both dropper paths fire at library load time on any require of the package.