Which versions of bigops-telephony-mock are malicious?

The following npm versions of bigops-telephony-mock are flagged malicious: 35.7.2. Treat any of these as compromised.

How do I remediate bigops-telephony-mock if I installed it?

bigops-telephony-mock 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.

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

If bigops-telephony-mock 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-telephony-mock part of a known attack campaign?

Yes — bigops-telephony-mock is associated with the IN-MAL-2026-016878 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-telephony-mock across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bigops-telephony-mock (version 35.7.2).

Malicious package

bigops-telephony-mocknpm

Advisory published Aug 7, 2026Updated Aug 7, 2026

bigops-telephony-mock is a confirmed malicious npm package (MAL-2026-13494) that steals credentials and exfiltrates sensitive data (malicious version 35.7.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bigops-telephony-mock (npm)

MAL-2026-13494

Immediate action

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

npm uninstall bigops-telephony-mock

What this malware does

Requiring the package (index.js ->./setup) triggers setup.js, which reconstructs destination hostnames from split string fragments (e.g. oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT fallback across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru, downloads a platform-specific binary via https.get, writes it to a disguised path under /tmp or %TEMP% (names such as analytics_state, dotnet_diag_.exe,.cache_), fs.chmodSync's it to 0755, and cp.spawn's it detached via /bin/sh -c '<file> &' or cmd.exe /c start /b. No version pin, no hash or signature verification, and destinations are assembled at runtime to defeat static inspection; child_process itself is required as "child_" + "process" in lib/telemetry.js. A second copy of the same download->base64-decode->chmod 755->spawn /bin/sh loader is bundled under lib/telemetry.js (approximately 81KB) framed as a telemetry SDK. The behavior fires on any require()/import of the package, gated only by an opt-out env var and a TTL marker file, so a normal npm install followed by loading the module causes attacker-controlled code to execute on the installer's machine.

Malicious versions

1 flagged

35.7.2

Indicators of compromise (SHA-256)

ccbd56ae20f9cc922c12df25456654a649c9bbc963aae4fa95e027f97628c45b

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for bigops-telephony-mock (version 35.7.2).
If you installed it — respond
bigops-telephony-mock 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-telephony-mock 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-telephony-mock on npm has been identified as a malicious package (version 35.7.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-016878

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks bigops-telephony-mock-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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