Which versions of bigops-customer are malicious?

The following npm versions of bigops-customer are flagged malicious: 35.1.1. Treat any of these as compromised.

How do I remediate bigops-customer if I installed it?

Remove bigops-customer from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed bigops-customer — how do I know if it already compromised me?

If bigops-customer was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is bigops-customer part of a known attack campaign?

Yes — bigops-customer is associated with the IN-MAL-2026-011507 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find bigops-customer across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bigops-customer (version 35.1.1).

Malicious package

bigops-customernpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

bigops-customer is a confirmed malicious npm package (MAL-2026-12038) that executes malicious code on install (malicious version 35.1.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bigops-customer (npm)

MAL-2026-12038

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall bigops-customer

What this malware does

The package's main entry requires ./_ext, which on load downloads a platform-specific binary from hardcoded Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, cf99-9b3.workers.dev, cf102-baf.workers.dev), assembled at runtime from split string fragments to evade static analysis. The fetched bytes are written to /tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmod 0755'd, and spawned detached via /bin/sh or cmd.exe. No hash or signature verification. A DNS TXT-record fallback channel (c.<domain> chunk count plus numbered subdomains, base64-decoded and joined) retrieves the payload when HTTPS fails. Comments frame the behavior as 'telemetry' with DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK opt-out gates and a .analytics_state re-run cooldown marker; the package description ('Bigops customer abstraction layer') is generic and unrelated to the actual code. Destinations are anonymous serverless hosts unrelated to any publisher identity; the fetched code is opaque and runs with the installer's privileges as a consequence of require('bigops-customer').

Malicious versions

1 flagged

35.1.1

Indicators of compromise (SHA-256)

59163c2270e2c84a960164463cb31d73a8db2e80e484d7d58d44ed2d32d36f0a

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bigops-customer (version 35.1.1).
If you installed it — respond
Remove bigops-customer from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If bigops-customer was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. bigops-customer on npm has been identified as a malicious package (version 35.1.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-011507

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks bigops-customer-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database