MAL-2026-13225

    Dashboard / Malicious Package / MAL-2026-13225

    MAL-2026-13225

    Published: 5 Aug 2026Last Modified: 5 Aug 2026

    Summary: Malicious code in bigops-nitro-client (npm)

    Details: Source: amazon-inspector (bfbd116994566a3e99f61697a738787d8089c2c99dbc9d5c55f9f3902a6b8cff) On require(), index.js loads _vendor.js which downloads a platform-specific native binary from rotating Cloudflare Workers endpoints (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT chunked base64 fallback channel via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched binary is written to /tmp or %TEMP% under disguised names (dotnet_diag,.cache), chmod 0755, and spawned detached via spawn('/bin/sh', ['-c', <path> + ' &']) or spawn('cmd',...). Host names are assembled at runtime from split string arrays joined with.join('') to evade static host scanning. The package presents itself as a trivial stub client and has no legitimate need for a native binary download or execution.

    References: https://www.npmjs.com/package/bigops-nitro-client/v/35.6.1

    Affected packages

    Package

    Name: bigops-nitro-client

    Purl: pkg:npm/bigops-nitro-client

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    35.6.1
    MAL-2026-13225 | CVE-DB