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test_document.py
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test_document.py
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#!/usr/bin/env python
import unittest
from mock import patch, MagicMock, Mock
import logging
import os
import subprocess
from document import Document
CONTENT_TYPES = {
'.docm': 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
}
# noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
class TestDocument(unittest.TestCase):
def setUp(self):
super(TestDocument, self).setUp()
self.logger = logging.getLogger('document')
self._logger_error = self.logger.error
self._logger_info = self.logger.info
self._exists = os.path.exists
self._isfile = os.path.isfile
os.path.exists = MagicMock(return_value=True)
os.path.isfile = MagicMock(return_value=True)
self._side_effect = []
def tearDown(self):
self.logger.error = self._logger_error
self.logger.info = self._logger_info
os.path.exists = self._exists
os.path.isfile = self._isfile
def test_check_FileWithNonXmlContent_ShouldLogClean(self):
self.logger.info = MagicMock()
Document('something.txt').initialize().check()
assert isinstance(self.logger.info, MagicMock)
self.logger.info.assert_called_once_with('something.txt OK')
def test_check_NonexistentFile_LogsError(self):
self.logger.error = Mock()
os.path.exists = Mock(return_value=False)
Document('nonexistent.file').initialize().check()
assert isinstance(self.logger.error, Mock)
self.logger.error.assert_called_once_with('File nonexistent.file does not exist')
@patch('subprocess.Popen')
def test_check_ContainsAutoExecutableMacro2_LogsError(self, popen_mock):
olevba_mock = Mock()
olevba_mock.configure_mock(**{'stdout.read.return_value': '| AutoExec | AutoOpen'})
file_mock = Mock()
file_mock.configure_mock(**{'stdout.read.return_value': 'application/vnd.ms-excel'})
subprocess.Popen.side_effect = [file_mock, olevba_mock]
self.logger.error = Mock()
file_name = 'document_with_vba.doc'
Document(file_name).initialize().check()
assert isinstance(subprocess.Popen, Mock)
self._assert_popen_call(self._setup_file_call(file_name))
self._assert_popen_call(self._setup_olevba_call(file_name))
self.logger.error.assert_called_once_with('VIRUS Contains macro(s) that execute automatically')
@staticmethod
def _assert_popen_call(command):
parameters = {"shell": True, "stderr": subprocess.PIPE, "stdout": subprocess.PIPE}
assert isinstance(subprocess.Popen, Mock)
subprocess.Popen.assert_any_call(command, **parameters)
@staticmethod
def _setup_file_call(file_name):
return '/usr/bin/file --brief --mime {0}'.format(file_name)
@staticmethod
def _setup_olevba_call(file_name):
return '/usr/local/bin/olevba -a {0}'.format(file_name)
@patch('subprocess.Popen')
def test_check_ContainsAutoExecutableMacro_LogsError(self, popen_mock):
self.logger.error = Mock()
self._setup_popen_mock('application/vnd.ms-excel')
self._setup_popen_mock('| AutoExec | AutoOpen')
subprocess.Popen.side_effect = self._side_effect
file_name = 'autoexec.doc'
Document(file_name).initialize().check()
self._assert_popen_call(self._setup_olevba_call(file_name))
self.logger.error.assert_called_once_with('VIRUS Contains macro(s) that execute automatically')
def _setup_macro_mocks(self):
olevba_mock = Mock()
olevba_mock.configure_mock(**{'stdout.read.return_value': '| AutoExec | AutoOpen'})
self._side_effect.append(olevba_mock)
def _setup_popen_mock(self, return_value):
process_mock = Mock()
process_mock.configure_mock(**{'stdout.read.return_value': return_value})
self._side_effect.append(process_mock)
@patch('subprocess.Popen')
def test_check_ContainsCommandExecutionMacro_LogsError(self, popen_mock):
self.logger.error = Mock()
self._setup_popen_mock('application/vnd.ms-excel')
self._setup_popen_mock('| Suspicious | Shell')
subprocess.Popen.side_effect = self._side_effect
file_name = 'shell.doc'
Document(file_name).initialize().check()
self._assert_popen_call(self._setup_olevba_call(file_name))
self.logger.error.assert_called_once_with('VIRUS Contains macro(s) that execute file(s)')
@patch('subprocess.Popen')
def test_check_ContainsFileDownloaderMacro_LogsError(self, popen_mock):
self.logger.error = Mock()
self._setup_popen_mock('application/vnd.ms-excel')
self._setup_popen_mock('| Suspicious | User-Agent')
subprocess.Popen.side_effect = self._side_effect
file_name = 'downloader.doc'
Document(file_name).initialize().check()
self._assert_popen_call(self._setup_olevba_call(file_name))
self.logger.error.assert_called_once_with('VIRUS Contains macro(s) that download file(s)')
@patch('subprocess.Popen')
def test_check_ContainsMultipleMacros_LogsMultipleFlags(self, popen_mock):
self.logger.error = Mock()
self._setup_popen_mock('application/vnd.ms-excel')
self._setup_popen_mock('| AutoExec | AutoOpen' + "\n" + '| Suspicious | User-Agent')
subprocess.Popen.side_effect = self._side_effect
file_name = 'multiple_flags.doc'
Document(file_name).initialize().check()
self._assert_popen_call(self._setup_olevba_call(file_name))
self.logger.error.assert_called_once_with(
'VIRUS Contains macro(s) that execute automatically, download file(s)')
@patch('subprocess.Popen')
def test_check_NonOfficeFile_SkipChecking(self, popen_mock):
self._setup_popen_mock('ASCII text')
file_name = 'example.txt'
Document(file_name).initialize().check()
self._assert_popen_call(self._setup_file_call(file_name))
@patch('subprocess.Popen')
def test_check_HideDetailsTrue_LogsErrorWithoutFlags(self, popen_mock):
self.logger.error = Mock()
self._setup_popen_mock('application/vnd.ms-excel')
self._setup_popen_mock('| Suspicious | User-Agent')
subprocess.Popen.side_effect = self._side_effect
file_name = 'dangerous_macro.doc'
Document(file_name, True).initialize().check()
self._assert_popen_call(self._setup_olevba_call(file_name))
self.logger.error.assert_called_once_with('VIRUS Dangerous macro')
if __name__ == '__main__':
unittest.main()