Which versions of bigops-offers are malicious?

The following npm versions of bigops-offers are flagged malicious: 35.6.8. Treat any of these as compromised.

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

bigops-offers establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.

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

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

Yes — bigops-offers is associated with the IN-MAL-2026-015768 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-offers across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bigops-offers (version 35.6.8).

Malicious package

bigops-offersnpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

bigops-offers is a confirmed malicious npm package (MAL-2026-13228) that opens a backdoor for remote access (malicious version 35.6.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bigops-offers (npm)

MAL-2026-13228

Immediate action

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

npm uninstall bigops-offers

What this malware does

[email protected] executes a binary dropper at require time. index.js loads./init on import; init.js assembles C2 hostnames from split string arrays (workers.dev subdomains oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) and fetches a platform-specific binary via https.get. A DNS TXT-record fallback assembles base64 payload chunks from c.dl.wel1.ru and 0..N.dl.wel1.ru (sdk/ext/pkg/net subdomains). The retrieved bytes are written to a disguised path (dotnet_diag<rand>.exe on Windows,.cache<rand> on Unix), chmod 0o755, and spawned detached via /bin/sh or cmd. A.analytics_state lock file and DISABLE_TELEMETRY/DO_NOT_TRACK env checks provide a telemetry cover story. Destinations, filenames, and delivery channels are string-split to evade static detection.

Malicious versions

1 flagged

35.6.8

Indicators of compromise (SHA-256)

422359e6c8044efa7c3873ff0859acb1480ea95413cbfb8829dc4c674de6f8d5

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for bigops-offers (version 35.6.8).
If you installed it — respond
bigops-offers establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If bigops-offers 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-offers on npm has been identified as a malicious package (version 35.6.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015768

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks bigops-offers-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

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