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)
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
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind 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.
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.
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.
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
Campaign
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.