Add PyArmor obfuscation detection heuristic#672
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stevenelliottjr wants to merge 1 commit intoDataDog:mainfrom
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Add PyArmor obfuscation detection heuristic#672stevenelliottjr wants to merge 1 commit intoDataDog:mainfrom
stevenelliottjr wants to merge 1 commit intoDataDog:mainfrom
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Adds a new Semgrep rule to detect packages that use PyArmor obfuscation, which is commonly used by malware to hide malicious code. Detects the following PyArmor patterns: - __pyarmor__() bootstrap code - pytransform runtime imports (PyArmor < 8.0) - pyarmor_runtime package imports (PyArmor >= 8.0) - __armor_enter__/__armor_exit__ bytecode markers - check_armored() and @assert_armored verification functions Closes DataDog#533
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Summary
This PR adds a new Semgrep rule to detect malicious packages that use PyArmor obfuscation, which is a common technique used by malware to hide malicious code from static analysis.
pyarmor.ymlrule that detects PyArmor obfuscation patternsDetection Coverage
The rule detects the following PyArmor patterns:
Bootstrap Code:
__pyarmor__(__name__, __file__, b'...')- main obfuscation wrapperLegacy PyTransform (PyArmor < 8.0):
from pytransform import pyarmor_runtimeimport pytransformpyarmor_runtime()callsModern Runtime (PyArmor >= 8.0):
from pyarmor_runtime import __pyarmor__from pyarmor_runtime_XXXXXX import __pyarmor__Bytecode Markers:
__armor_enter__/__armor_exit____pyarmor_enter__/__pyarmor_exit__Verification Functions:
check_armored()@assert_armored()Example Detection
Test Plan
pytest tests/core/test_sourcecode_analyzer.py) - all passCloses #533