Which versions of extrazip are malicious?

The following PyPI versions of extrazip are flagged malicious: 0.1.0. Treat any of these as compromised.

How do I remediate extrazip if I installed it?

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

If extrazip 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 extrazip part of a known attack campaign?

Yes — extrazip is associated with the 2025-11-uzip 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 extrazip across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for extrazip (version 0.1.0).

Part of a larger attack: 2025-11-uzip published 11 malicious packages. See the full campaign →

Malicious package

extrazipPyPI

Advisory published Dec 27, 2025Updated Feb 26, 2026

extrazip is a confirmed malicious PyPI package (MAL-2025-192948) that steals credentials and exfiltrates sensitive data (malicious version 0.1.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in extrazip (PyPI)

MAL-2025-192948

Immediate action

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

pip uninstall extrazip

What this malware does

During initialization of the archive-support class, the package starts code from another file and downloads multi-stage malware

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-11-uzip

Reasons (based on the campaign):

Downloads and executes a remote executable.
obfuscation
malware

Malicious versions

1 flagged

0.1.0

Indicators of compromise (SHA-256)

f58777710463b043a0724ad1d7999807501b56667a10eced314fd036e9303fdf

9aa3db32c22351c4dfcbfdfce89fb38ca19fac546dba3f82d084212f8c830632

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for extrazip (version 0.1.0).
If you installed it — respond
extrazip 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 extrazip 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. extrazip on PyPI has been identified as a malicious package (version 0.1.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2025-11-uzip

References

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks extrazip-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

All malware advisories How O3 detects malware Vulnerability database