Which versions of testcatplzignore are malicious?

The following PyPI versions of testcatplzignore are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate testcatplzignore if I installed it?

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

If testcatplzignore 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 testcatplzignore part of a known attack campaign?

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

Search your lockfiles and build artifacts for testcatplzignore (version 0.0.1).

Malicious package

testcatplzignorePyPI

Advisory published Jul 16, 2025Updated Dec 12, 2025

testcatplzignore is a confirmed malicious PyPI package (MAL-2025-191893) that steals credentials and exfiltrates sensitive data (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in testcatplzignore (PyPI)

MAL-2025-191893

Immediate action

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

pip uninstall testcatplzignore

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

0.0.1

Indicators of compromise (SHA-256)

127522f06030b4b274b6a785c8d6672ae2cf9257086f0ae715006e899255c9f3

c3cde630e4fbb39749856eccaa8f1afb813c865152bcf6d2eb0a639f71f2b4cb

660588570f477a24dd99b29fc46a51a1719d72623ebccba8928cbd840b378a6e

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for testcatplzignore (version 0.0.1).
If you installed it — respond
testcatplzignore 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 testcatplzignore 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. testcatplzignore on PyPI has been identified as a malicious package (version 0.0.1 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 testcatplzignore-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