nwin64tls

GHSA-mfcv-hjf9-cj3p

Malicious code in nwin64tls (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.0.1`

## Source: kam193 (72555231efbf126e61cb3aa59d3482bc7967af46898e46eb2b9b7f81af8cd40e)
Importing the module starts a loop that listens to key strokes and on every capslock press exfiltrates screenshot to a hardcoded location.


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


Campaign: 2026-04-old-nwin32tls


Reasons (based on the campaign):


 - spyware-like

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/nwin64tls/MAL-2026-2432.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/nwin64tls
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/nwin64tls/MAL-2026-2432.json
- https://github.com/advisories/GHSA-mfcv-hjf9-cj3p

Compromised versions (1)

= 0.0.1

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