nwin32tls

GHSA-mvhq-crx4-r8q7

Malicious code in nwin32tls (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 0.0.1`

## Source: kam193 (a47778618cad57dbc584afdff7ed138032b69c423a9812e1bc8f86c13129f01d)
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/nwin32tls/MAL-2026-2431.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/nwin32tls
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/nwin32tls/MAL-2026-2431.json
- https://github.com/advisories/GHSA-mvhq-crx4-r8q7

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.