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Malicious package

demozecoxPyPI

Advisory published Updated

demozecox is a confirmed malicious PyPI package (MAL-2026-1285) that executes malicious code on install (malicious version 0.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in demozecox (PyPI)

MAL-2026-1285
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall demozecox

What this malware does

Packages that might be part of testing for pentesting / malicious activity / joy, with suspicious activity that does not present any real harm.

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-simple-tests

Reasons (based on the campaign):

  • The package overrides the install command in setup.py to execute malicious code during installation.

Malicious versions

1 flagged
0.0.0

Indicators of compromise (SHA-256)

b32c6e6d2566a58b9a104d162c060982bff488fa547fb706c43553d0b7185ccb

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for demozecox (version 0.0.0).

  2. If you installed it — respond

    Remove demozecox from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If demozecox 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. demozecox on PyPI has been identified as a malicious package (version 0.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GENERIC-simple-tests

References

Credits

  • Kamil Mańkowski (kam193) · analyst

Detect & block this

O3 blocks demozecox-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Explore

demozecox (PyPI) malicious package — MAL-2026-1285 | O3 Security