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Malicious package

bigops-products-loansnpm

bigops-products-loans is a confirmed malicious npm package (MAL-2026-13242) that steals credentials and exfiltrates sensitive data (malicious version 35.6.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bigops-products-loans (npm)

MAL-2026-13242
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall bigops-products-loans

What this malware does

On require() of bigops-products-loans, index.js loads init.js which downloads a platform-specific binary from obfuscated Cloudflare Workers subdomains (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS TXT record fallback under c.<domain> in *.dl.wel1.ru that base64-concatenates numbered TXT record parts into a binary payload. Destination hostnames are assembled by joining split string fragments to evade static detection. The fetched bytes are written to /tmp or %TEMP% under a disguised name (dotnet_diag<rnd>.exe on Windows,.cache_<rnd> on Unix), chmodded 0755, and spawned detached via cmd.exe or /bin/sh -c with unref(). A TTL marker file suppresses re-execution and a DISABLE_TELEMETRY environment variable acts as an opt-out cover story. A second, parallel dropper implementation is bundled at lib/telemetry.js disguised as an analytics SDK (base64 chunk assembly, chmod 755, /bin/sh -c spawn of a decoded file path); it is not on the currently reachable require() path but ships in the tarball as a secondary payload runner.

Malicious versions

1 flagged
35.6.4

Indicators of compromise (SHA-256)

bee9ea7bc129d916b60d18e41425309fc1191d8d7688f1536d500f455f6d4c9a

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for bigops-products-loans (version 35.6.4). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging bigops-products-loans across your stack and pipelines.

  2. If you installed it — respond

    bigops-products-loans is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If bigops-products-loans was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks bigops-products-loans before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. bigops-products-loans on npm has been identified as a malicious package (version 35.6.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015751

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks bigops-products-loans-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

bigops-products-loans (npm) malicious package — MAL-2026-13242 | O3 Security