win-update-helper-tool-v2

GHSA-56v9-49r7-3jrp

Malicious code in win-update-helper-tool-v2 (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (251972769752a77d15c86627fe078560c49ce79a47bcc4542128386eb5362342)
If run as a module, the code runs code to silently control the device via Telegram bot (execute commands, exfiltrate files).


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


Campaign: 2026-05-system-update-tool


Reasons (based on the campaign):


 - rat


 - The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.


 - files-exfiltration


 - peristence-autorun


 - persistence


 - impersonation

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/win-update-helper-tool-v2/MAL-2026-3246.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/win-update-helper-tool-v2
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/win-update-helper-tool-v2/MAL-2026-3246.json
- https://github.com/advisories/GHSA-56v9-49r7-3jrp

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.