Cython Loader Drops Runtime Python Scripts

Daniel Jeremiah@daniyyell

•updated Jun 20, 2026•0•0•1

Detects a compiled Python extension writing .py or .pyc files into a temporary or profile directory for later execution. This behavior is often associated with malware that uses Python for its runtime logic, where the compiled Python code (e.g., from Cython) extracts and drops the actual Python scripts for execution.