Which versions of libopenblas are malicious?

The following PyPI versions of libopenblas are flagged malicious: 0.3.21, 0.4.21, 0.7. Treat any of these as compromised.

How do I remediate libopenblas if I installed it?

libopenblas 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 libopenblas — how do I know if it already compromised me?

If libopenblas 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 libopenblas part of a known attack campaign?

Yes — libopenblas is associated with the GENERIC-standard-pypi-install-pentest 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 libopenblas across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for libopenblas (3 malicious versions).

Malicious package

libopenblasPyPI

Advisory published Sep 18, 2025Updated Dec 31, 2025

libopenblas is a confirmed malicious PyPI package (MAL-2025-191780) that steals credentials and exfiltrates sensitive data (malicious versions 0.3.21, 0.4.21, 0.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in libopenblas (PyPI)

MAL-2025-191780

Immediate action

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

pip uninstall libopenblas

What this malware does

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.
The package overrides the install command in setup.py to execute malicious code during installation.

Malicious versions

3 flagged

0.3.210.4.210.7

Indicators of compromise (SHA-256)

1d740100adb663c5c6763e554d6eb742ef1ace59754ed40ec1ed23a887d02d93

4c645a504ef0fcafc27968f16db25a5850a7797f3659640cf558053d89742976

6d7d661df00675fdb5162dcba65e001ceb5142f41de2980ac19ad49bddb9d2c4

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for libopenblas (3 malicious versions).
If you installed it — respond
libopenblas 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 libopenblas 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. libopenblas on PyPI has been identified as a malicious package (versions 0.3.21, 0.4.21, 0.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GENERIC-standard-pypi-install-pentest

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)

Detect & block this

O3 blocks libopenblas-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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