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OpenAdvisories
Malicious MAL-2025-6457

atlasctf-21-prod-20

PyPI package · versions 99.99.99, 99.99.99.1

Reported Jun 7, 2025 · Updated Mar 19, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: kam193 (ffe859775c26074cc4af620ba898f558fb64310ff0cd6ac1cb212700fadcb182)
On installation or importing, the package attempts to exfiltrate some basic information, e.g. /etc/passwd

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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.