mainx

Details

**Severity:** Critical

**Affected versions:** `= 0.1`

## 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.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/mainx/MAL-2025-6540.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/mainx
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/mainx/MAL-2025-6540.json
- https://www.sonatype.com/blog/sonatype-uncovers-global-espionage-campaign-in-open-source-ecosystems
- https://github.com/advisories/GHSA-3342-5jgg-8h7h

Compromised versions (1)

• = 0.1

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