Which versions of lacucaracha are malicious?

The following PyPI versions of lacucaracha are flagged malicious: 99.99. Treat any of these as compromised.

How do I remediate lacucaracha if I installed it?

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

If lacucaracha 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 lacucaracha part of a known attack campaign?

Yes — lacucaracha 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 lacucaracha across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for lacucaracha (version 99.99).

Malicious package

lacucarachaPyPI

Advisory published Jul 26, 2024Updated Dec 12, 2025

lacucaracha is a confirmed malicious PyPI package (MAL-2024-12299) that steals credentials and exfiltrates sensitive data (malicious version 99.99). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in lacucaracha (PyPI)

MAL-2024-12299

Immediate action

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

pip uninstall lacucaracha

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

1 flagged

99.99

Indicators of compromise (SHA-256)

855506bd836744abb1ea4ba4e299670e8f6f8055af6bede78d68f7a2b1b6bb2e

d1051a6089333b59d0a35994cfda71ccb3984a5809cd82168072b041fda74082

5b79e40a65f1b193a245e10524b81567ffe680a7d4221f293bb903ddf0e308fe

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for lacucaracha (version 99.99).
If you installed it — respond
lacucaracha 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 lacucaracha 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. lacucaracha on PyPI has been identified as a malicious package (version 99.99 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 lacucaracha-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