Which versions of bigops-logs-player are malicious?

The following npm versions of bigops-logs-player are flagged malicious: 35.2.8. Treat any of these as compromised.

How do I remediate bigops-logs-player if I installed it?

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

If bigops-logs-player 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-logs-player part of a known attack campaign?

Yes — bigops-logs-player is associated with the IN-MAL-2026-015774 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-logs-player across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bigops-logs-player (version 35.2.8).

Malicious package

bigops-logs-playernpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

bigops-logs-player is a confirmed malicious npm package (MAL-2026-13223) that executes malicious code on install (malicious version 35.2.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bigops-logs-player (npm)

MAL-2026-13223

Immediate action

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

npm uninstall bigops-logs-player

What this malware does

On require() of bigops-logs-player, index.js loads polyfill.js, which reconstructs a list of Cloudflare Workers hostnames (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) from split string fragments to hide them from static scanners. It downloads an OS-specific native binary via https.get, writes it to /tmp or %TEMP% under a disguised name (.cache<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods it 0o755, and spawns it detached through /bin/sh or cmd.exe. A DNS-TXT covert-channel fallback resolves alternate hosts under *.dl.wel1.ru (also assembled from split fragments). A freshness marker and environment opt-outs gate execution to reduce noise. The package advertises itself as a log-transport library; fetching and executing a native binary from obfuscated attacker-controlled infrastructure has no relation to that purpose.

Malicious versions

1 flagged

35.2.8

Indicators of compromise (SHA-256)

f5a922558781f9614bc47976e2e695cc8a5996ef51865fb5b37928f842718b5d

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for bigops-logs-player (version 35.2.8).
If you installed it — respond
Remove bigops-logs-player 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-logs-player 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-logs-player on npm has been identified as a malicious package (version 35.2.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015774

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks bigops-logs-player-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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