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OpenAdvisories
Malicious MAL-2025-3278

subdomainer

PyPI package · versions 1.0.0

Reported Jul 26, 2024 · Updated Dec 12, 2025

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 (be979ecd7261fc996ff3007675ba6e59cbdab8da999ab44c937adb5b1a609724)
Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

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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: 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.

Source: ossf-package-analysis (7a632d46c9cda2dc51b4f8dabb8860c8bed1f5c0250dc785770b881f6b88c4d6)
The OpenSSF Package Analysis project identified 'subdomainer' @ 1.0.0 (pypi) as malicious.

It is considered malicious because:

- The package communicates with a domain associated with malicious activity.