Which versions of tfjs-custom-module are malicious?

The following npm versions of tfjs-custom-module are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate tfjs-custom-module if I installed it?

tfjs-custom-module 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 tfjs-custom-module — how do I know if it already compromised me?

If tfjs-custom-module was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is tfjs-custom-module part of a known attack campaign?

Yes — tfjs-custom-module is associated with the IN-MAL-2026-018278 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 tfjs-custom-module across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for tfjs-custom-module (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging tfjs-custom-module across your stack and pipelines.

Malicious package

tfjs-custom-modulenpm

tfjs-custom-module is a confirmed malicious npm package (MAL-2026-14196) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in tfjs-custom-module (npm)

MAL-2026-14196

Immediate action

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

npm uninstall tfjs-custom-module

What this malware does

tfjs-custom-module is a typosquat of the tensorflow/tfjs package. Its package.json declares a postinstall lifecycle script that runs automatically on npm install. The script collects installer host identifiers — os.hostname(), process.platform, process.arch, process.version, package name, and the npm lifecycle event — and POSTs them as JSON via https.request to the hardcoded external host 8xq4kw5d.instances.poc.jchunt.top at path /tfjs-custom-module. The endpoint is not the installer's infrastructure and the beacon is not opt-in. This is host-reconnaissance exfiltration to an author-controlled destination running under a look-alike canary domain, regardless of any self-labeling as security research.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

c50d87a4593cb5a0444f2333f368180b64dfb5d3b8f37e0baf4f6d686ea2ef74

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for tfjs-custom-module (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging tfjs-custom-module across your stack and pipelines.
If you installed it — respond
tfjs-custom-module 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 tfjs-custom-module was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks tfjs-custom-module before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. tfjs-custom-module on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-018278

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks tfjs-custom-module-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

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