turbocalcng

Details

**Severity:** Critical

**Affected versions:** `= 0.1.0`

## Source: amazon-inspector (58f668de627f83b0348d681edd090804f202add609fdc9a3c671f987608fb448)
turbocalcng/__init__.py imports arithmetic.py, which — beneath a facade of arithmetic helpers — contains an XOR-obfuscated in-memory native code execution path reachable at import time. A helper iReferringj(k,d) XOR-decodes byte lists into the strings 'base64', 'ctypes', 'mmap', 'threading', 'CFUNCTYPE', 'Thread', 'daemon', 'start', etc., and resolves them dynamically via getattr / __import__ / importlib.util.spec_from_file_location to hide the dangerous imports from static review. The reachable loader allocates an RWX region with mmap.mmap(-1, size, prot=7, flags=34), writes decoded bytes into it, casts the region's address through ctypes.CFUNCTYPE and invokes it inside a daemon threading.Thread — executing attacker-supplied native code in the installer's Python process on `import turbocalcng`. The obfuscation of core module names alongside the RWX + function-pointer-cast + thread-start primitive is characteristic of hostile shellcode injection, not any legitimate arithmetic functionality.

## Source: kam193 (42db7e152a9be09d9e9dbd0db5242957ff335922fbc9cf430d406cff396a063f)
During import an obfuscated code starts in-memory functions from a binary blob; after that, it communicates with dockfinancial[.]lu, the exact behaviour is unknown.


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


Campaign: 2026-07-turbocalc


Reasons (based on the campaign):


 - obfuscation


 - other

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/turbocalcng/MAL-2026-10441.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/turbocalcng
- https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/turbocalcng/MAL-2026-10441.json
- https://pypi.org/project/turbocalcng/0.1.0
- https://tria.ge/260710-tdnrmaex4s/behavioral1
- https://www.virustotal.com/gui/file/b763d1cb200d885985d0b592323ec8180817da4cc2117092176265d56723d44f/detection
- https://github.com/advisories/GHSA-pwf2-vmjj-xxhh

Compromised versions (1)

• = 0.1.0

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