mirror of https://github.com/MISP/PyMISP
92 lines
3.6 KiB
Python
92 lines
3.6 KiB
Python
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
|
|
from ..exceptions import InvalidMISPObject
|
|
from .abstractgenerator import AbstractMISPObjectGenerator
|
|
from io import BytesIO
|
|
from hashlib import md5, sha1, sha256, sha512
|
|
import logging
|
|
|
|
logger = logging.getLogger('pymisp')
|
|
|
|
|
|
try:
|
|
import lief
|
|
HAS_LIEF = True
|
|
except ImportError:
|
|
HAS_LIEF = False
|
|
|
|
try:
|
|
import pydeep
|
|
HAS_PYDEEP = True
|
|
except ImportError:
|
|
HAS_PYDEEP = False
|
|
|
|
|
|
class MachOObject(AbstractMISPObjectGenerator):
|
|
|
|
def __init__(self, parsed=None, filepath=None, pseudofile=None, standalone=True, **kwargs):
|
|
# Python3 way
|
|
# super().__init__('elf')
|
|
super(MachOObject, self).__init__('macho', standalone=standalone, **kwargs)
|
|
if not HAS_PYDEEP:
|
|
logger.warning("Please install pydeep: pip install git+https://github.com/kbandla/pydeep.git")
|
|
if not HAS_LIEF:
|
|
raise ImportError('Please install lief, documentation here: https://github.com/lief-project/LIEF')
|
|
if pseudofile:
|
|
if isinstance(pseudofile, BytesIO):
|
|
self.__macho = lief.MachO.parse(raw=pseudofile.getvalue())
|
|
elif isinstance(pseudofile, bytes):
|
|
self.__macho = lief.MachO.parse(raw=pseudofile)
|
|
else:
|
|
raise InvalidMISPObject('Pseudo file can be BytesIO or bytes got {}'.format(type(pseudofile)))
|
|
elif filepath:
|
|
self.__macho = lief.MachO.parse(filepath)
|
|
elif parsed:
|
|
# Got an already parsed blob
|
|
if isinstance(parsed, lief.MachO.Binary):
|
|
self.__macho = parsed
|
|
else:
|
|
raise InvalidMISPObject('Not a lief.MachO.Binary: {}'.format(type(parsed)))
|
|
self.generate_attributes()
|
|
|
|
def generate_attributes(self):
|
|
self.add_attribute('type', value=str(self.__macho.header.file_type).split('.')[1])
|
|
self.add_attribute('name', value=self.__macho.name)
|
|
# General information
|
|
if self.__macho.has_entrypoint:
|
|
self.add_attribute('entrypoint-address', value=self.__macho.entrypoint)
|
|
# Sections
|
|
self.sections = []
|
|
if self.__macho.sections:
|
|
pos = 0
|
|
for section in self.__macho.sections:
|
|
s = MachOSectionObject(section, self._standalone, default_attributes_parameters=self._default_attributes_parameters)
|
|
self.add_reference(s.uuid, 'includes', 'Section {} of MachO'.format(pos))
|
|
pos += 1
|
|
self.sections.append(s)
|
|
self.add_attribute('number-sections', value=len(self.sections))
|
|
|
|
|
|
class MachOSectionObject(AbstractMISPObjectGenerator):
|
|
|
|
def __init__(self, section, standalone=True, **kwargs):
|
|
# Python3 way
|
|
# super().__init__('pe-section')
|
|
super(MachOSectionObject, self).__init__('macho-section', standalone=standalone, **kwargs)
|
|
self.__section = section
|
|
self.__data = bytes(self.__section.content)
|
|
self.generate_attributes()
|
|
|
|
def generate_attributes(self):
|
|
self.add_attribute('name', value=self.__section.name)
|
|
size = self.add_attribute('size-in-bytes', value=self.__section.size)
|
|
if int(size.value) > 0:
|
|
self.add_attribute('entropy', value=self.__section.entropy)
|
|
self.add_attribute('md5', value=md5(self.__data).hexdigest())
|
|
self.add_attribute('sha1', value=sha1(self.__data).hexdigest())
|
|
self.add_attribute('sha256', value=sha256(self.__data).hexdigest())
|
|
self.add_attribute('sha512', value=sha512(self.__data).hexdigest())
|
|
if HAS_PYDEEP:
|
|
self.add_attribute('ssdeep', value=pydeep.hash_buf(self.__data).decode())
|