nanoinstaller

GHSA-4f7j-7jmw-jfrv

Malicious code in nanoinstaller (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (9f6ea4dd9867e528445ba01d2ceed3638e6178b2a940a2598c0f89eca5795802)
Package is designed to download and execute a remote script, which then downloads and runs a malicious executable


---

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


Campaign: 2025-12-pdatainstaller


Reasons (based on the campaign):


 - Downloads and executes a remote executable.


 - Downloads and executes a remote malicious script.


 - malware

---

Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/nanoinstaller/MAL-2026-351.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/nanoinstaller
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/nanoinstaller/MAL-2026-351.json
- https://www.virustotal.com/gui/file-analysis/NzcxYTcyZDQxMzc0ZDUwNTk4MDY4OTE3Y2U3MzdhNDY6MTc2NzQwMTQwOQ==
- https://github.com/advisories/GHSA-4f7j-7jmw-jfrv

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.