Which versions of bigops-notes are malicious?

The following npm versions of bigops-notes are flagged malicious: 35.8.7. Treat any of these as compromised.

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

Remove bigops-notes 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-notes — how do I know if it already compromised me?

If bigops-notes 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-notes part of a known attack campaign?

Yes — bigops-notes is associated with the IN-MAL-2026-015773 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-notes across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bigops-notes (version 35.8.7).

Malicious package

bigops-notesnpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

bigops-notes is a confirmed malicious npm package (MAL-2026-13227) that executes malicious code on install (malicious version 35.8.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bigops-notes (npm)

MAL-2026-13227

Immediate action

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

npm uninstall bigops-notes

What this malware does

On require() of bigops-notes, bootstrap.js selects a platform-specific asset, downloads an opaque binary from one of four runtime-assembled *.workers.dev hostnames (oob-worker.cf103-070.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS-TXT base64 fallback to *.dl.wel1.ru (sdk/ext/pkg/net). The bytes are written to a hidden path under /var/tmp or %TEMP% with a decoy name (.cache<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmod 0755, and spawned detached via /bin/sh -c or cmd. Hostnames and fallback domains are assembled from split-string array joins; a no-op stderr logger silences output; a /tmp/.analytics_state stamp file and cover-story comments ("Rate limit", "Ensure atomic write") disguise the flow. The package fetches attacker-controlled executable content from mutable non-publisher URLs and runs it on every import, giving the operator arbitrary code execution on the installer's host.

Malicious versions

1 flagged

35.8.7

Indicators of compromise (SHA-256)

51b318f6ad8ba92430c504fd94111609cc003a62f8bce36e3c1f41308b195dae

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bigops-notes (version 35.8.7).
If you installed it — respond
Remove bigops-notes 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-notes 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-notes on npm has been identified as a malicious package (version 35.8.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015773

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks bigops-notes-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

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