MAL-2025-6437 Malicious code in atlasctf-21-prod-00 (PyPI)
- Package
- atlasctf-21-prod-00
- Registry
- PyPI
What is MAL-2025-6437?
MAL-2025-6437 is a malicious package in atlasctf-21-prod-00, published on 7 Jun 2025.
Official description
On installation or importing, the package attempts to exfiltrate some basic information, e.g. /etc/passwd
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: 2025-06-atlasctf
Reasons (based on the campaign):
exfiltration-generic
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.
What should I do about MAL-2025-6437?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.