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Deduplicate procmems by sha256 hash #119

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Deduplicate procmems by sha256 hash #119

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Deduplicate procmems by sha256 hash
msm-code Apr 4, 2024
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msm-code Apr 4, 2024
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9 changes: 9 additions & 0 deletions malduck/procmem/binmem.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import logging
from abc import ABCMeta, abstractmethod
from hashlib import sha256
from typing import Iterator, List, Optional, Type, TypeVar

from .procmem import ProcessMemory, ProcessMemoryBuffer
Expand Down Expand Up @@ -78,10 +79,18 @@ def load_binaries_from_memory(cls: Type[T], procmem: ProcessMemory) -> Iterator[
In previous versions it was done by extractor, so it was working only
if memory-aligned version was also "valid".
"""
seen_hashes = set()
if cls.__magic__ is None:
raise NotImplementedError()
for binary_va in procmem.findv(cls.__magic__):
binary_procmem_dmp = cls.from_memory(procmem, base=binary_va)

# Deduplicate procmems by the content hash
next_hash = sha256(binary_procmem_dmp.m).digest()
if next_hash in seen_hashes:
continue
seen_hashes.add(next_hash)

if binary_procmem_dmp.is_valid():
yield binary_procmem_dmp
binary_procmem_img = binary_procmem_dmp.image
Expand Down
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