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OpenAdvisories
Malicious MAL-2025-6540

mainx

PyPI package · versions 0.1, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.0

Reported Jun 24, 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 (6a77aad2f42165ec9582f04fffab948f6a1125564e34f4d09c8d089b2708d8d2)
While described as educational package to simulate post-exploitation environment, the malware is active and once started, automatically attempts to exfiltrate sensitive data (credentials, cookies, etc.) and places a Discord implant. The remote target is hard coded in the code.

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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-06-mainx

Reasons (based on the campaign):

- obfuscation

- infostealer

- files-exfiltration

- exfiltration-credentials

- exfiltration-browser-data

- peristence-autorun

- The package contains code to detect if it is running in a sandbox environment.