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OpenAdvisories
Malicious MAL-2026-13649

sme-rko-finance-front-operations-tax

npm package · versions 35.8.1

Reported Aug 8, 2026 · Updated Aug 8, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (ede42a446ab3685943424af5a5411fb93bf5961c83ccf6ce02b35b8d835c60aa)
On require, index.js loads _platform.js and lib/telemetry.js, which download a platform-specific binary from obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, cf103-070, cf102-baf) with a DNS TXT-record fallback to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /tmp or Windows Temp under disguised names (e.g.,.cache_<hex>, dotnet_diag_<hex>.exe), chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Hostnames and sensitive API names (child_process, chmodSync) are reassembled at runtime from split string arrays to defeat static analysis. The package's stated purpose (finance/tax operations frontend) has no legitimate need to fetch and execute an opaque native binary from non-publisher infrastructure.