atlasctf-21-prod-04

GHSA-9cjx-mqgx-hr4h

Malicious code in atlasctf-21-prod-04 (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 99.99.99`

## Source: kam193 (001a32ea254df328ea468b5f678beeac998089d5d28d365d4bd412f5b6839267)
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.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/atlasctf-21-prod-04/MAL-2025-6441.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/atlasctf-21-prod-04
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/atlasctf-21-prod-04/MAL-2025-6441.json
- https://github.com/advisories/GHSA-9cjx-mqgx-hr4h

Compromised versions (1)

= 99.99.99

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.