pywin-simple-gui

GHSA-h25v-cm97-m36v

Malicious code in pywin-simple-gui (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (43b40c0dbbbc187822a28a401194873adc73d13e531f2789c4227374f7ec9e26)
The package pretends to be a development helper but, in fact, downloads a remote executable. Dynamic analysis reveals actions like disabling Windows Defender and interest in cryptocurrencies as well as using Telegram as C2.


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


Campaign: 2026-02-pywin-simple-gui


Reasons (based on the campaign):


 - impersonation


 - Downloads and executes a remote executable.


 - modify-system-without-consent


 - crypto-related

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/pywin-simple-gui/MAL-2026-933.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/pywin-simple-gui
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/pywin-simple-gui/MAL-2026-933.json
- https://tria.ge/260217-2y4mksat6h/behavioral1
- https://www.virustotal.com/gui/file/1d26323ed3271a04242cb9054eb2ea2c52fb64a971cff9affa38d55e02cd50d2/detection
- https://github.com/advisories/GHSA-h25v-cm97-m36v

Compromised versions (1)

= 1.0.0

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