Which versions of kzip are malicious?

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

How do I remediate kzip if I installed it?

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

If kzip 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 kzip part of a known attack campaign?

Yes — kzip 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 kzip 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 kzip (version 0.1.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging kzip across your stack and pipelines.

Malicious package

kzipPyPI

Malicious code in kzip (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2025-192432

Immediate action

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

pip uninstall kzip

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)

7a81e0fa699edbad810083efb9de4e22f5088c31c22fdf71f7e519269dc5ad01

fba043c3ba0f38263959043bbea17a8c7222330f1a346a601f97ce9def4f069f

a67b89708e009022868eb6551a9d0459a41ca8ede54f29b98713b03d0f5b93a6

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 kzip (version 0.1.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging kzip across your stack and pipelines.
If you installed it — respond
kzip 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 kzip 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 kzip 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. kzip 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) · analyst

Detect & block this

O3 blocks kzip-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