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misp-modules/misp_modules/modules/import_mod/threatanalyzer_import.py

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Added ThreatAnalyzer sandbox import Experimental module - some parts should be migrated to
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'''
import
define mandatory
'''
import json
import base64
import re
import zipfile
import ipaddress
import io
import logging
misperrors = {'error': 'Error'}
userConfig = {}
inputSource = ['file']
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moduleinfo = {'version': '0.7', 'author': 'Christophe Vandeplas',
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'description': 'Import for ThreatAnalyzer archive.zip/analysis.json files',
'module-type': ['import']}
moduleconfig = []
log = logging.getLogger('misp-modules')
# FIXME - many hardcoded filters should be migrated to import regexes. See also https://github.com/MISP/MISP/issues/2712
# DISCLAIMER - This module is to be considered as experimental and needs much fine-tuning.
# more can be done with what's in the ThreatAnalyzer archive.zip
def handler(q=False):
if q is False:
return False
results = []
zip_starts = 'PK'
request = json.loads(q)
data = base64.b64decode(request['data'])
if data[:len(zip_starts)].decode() == zip_starts:
with zipfile.ZipFile(io.BytesIO(data), 'r') as zf:
# unzipped_files = []
modified_files_mapping = {}
# pre-process some of the files in the zip
for zip_file_name in zf.namelist(): # Get all files in the zip file
# find the filenames of the modified_files
if re.match(r"Analysis/proc_\d+/modified_files/mapping\.log", zip_file_name):
with zf.open(zip_file_name, mode='r', pwd=None) as fp:
file_data = fp.read()
for line in file_data.decode().split('\n'):
if line:
l_fname, l_size, l_md5, l_created = line.split('|')
l_fname = cleanup_filepath(l_fname)
if l_fname:
if l_size == 0:
pass # FIXME create an attribute for the filename/path
else:
# file is a non empty sample, upload the sample later
modified_files_mapping[l_md5] = l_fname
# now really process the data
for zip_file_name in zf.namelist(): # Get all files in the zip file
# print('Processing file: {}'.format(zip_file_name))
if re.match(r"Analysis/proc_\d+/modified_files/.+\.", zip_file_name) and "mapping.log" not in zip_file_name:
sample_md5 = zip_file_name.split('/')[-1].split('.')[0]
if sample_md5 in modified_files_mapping:
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current_sample_filename = modified_files_mapping[sample_md5]
# print("{} maps to {}".format(sample_md5, current_sample_filename))
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with zf.open(zip_file_name, mode='r', pwd=None) as fp:
file_data = fp.read()
results.append({
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'values': current_sample_filename,
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'data': base64.b64encode(file_data).decode(),
'type': 'malware-sample', 'categories': ['Artifacts dropped', 'Payload delivery'], 'to_ids': True, 'comment': ''})
if 'Analysis/analysis.json' in zip_file_name:
with zf.open(zip_file_name, mode='r', pwd=None) as fp:
file_data = fp.read()
analysis_json = json.loads(file_data.decode('utf-8'))
results += process_analysis_json(analysis_json)
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try:
sample_filename = analysis_json.get('analysis').get('@filename')
if sample_filename:
with zf.open('sample', mode='r', pwd=None) as fp:
file_data = fp.read()
results.append({
'values': sample_filename,
'data': base64.b64encode(file_data).decode(),
'type': 'malware-sample', 'categories': ['Artifacts dropped', 'Payload delivery'], 'to_ids': True, 'comment': ''})
except Exception as e:
# no 'sample' in archive, might be an url analysis, just ignore
pass
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else:
try:
results = process_analysis_json(json.loads(data.decode('utf-8')))
except ValueError:
log.warning('MISP modules {0} failed: uploaded file is not a zip or json file.'.format(request['module']))
return {'error': 'Uploaded file is not a zip or json file.'.format(request['module'])}
pass
# keep only unique entries based on the value field
results = list({v['values']: v for v in results}.values())
r = {'results': results}
return r
def process_analysis_json(analysis_json):
if 'analysis' in analysis_json and 'processes' in analysis_json['analysis'] and 'process' in analysis_json['analysis']['processes']:
# if 'analysis' in analysis_json and '@filename' in analysis_json['analysis']:
# sample['values'] = analysis_json['analysis']['@filename']
for process in analysis_json['analysis']['processes']['process']:
# print_json(process)
if 'connection_section' in process and 'connection' in process['connection_section']:
for connection_section_connection in process['connection_section']['connection']:
connection_section_connection['@remote_ip'] = cleanup_ip(connection_section_connection['@remote_ip'])
connection_section_connection['@remote_hostname'] = cleanup_hostname(connection_section_connection['@remote_hostname'])
if connection_section_connection['@remote_ip'] and connection_section_connection['@remote_hostname']:
val = '{}|{}'.format(connection_section_connection['@remote_hostname'],
connection_section_connection['@remote_ip'])
# print("connection_section_connection hostname|ip: {}|{} IDS:yes".format(
# connection_section_connection['@remote_hostname'],
# connection_section_connection['@remote_ip'])
# )
yield({'values': val, 'type': 'domain|ip', 'categories': 'Network activity', 'to_ids': True, 'comment': ''})
elif connection_section_connection['@remote_ip']:
# print("connection_section_connection ip-dst: {} IDS:yes".format(
# connection_section_connection['@remote_ip'])
# )
yield({'values': connection_section_connection['@remote_ip'], 'type': 'ip-dst', 'to_ids': True, 'comment': ''})
elif connection_section_connection['@remote_hostname']:
# print("connection_section_connection hostname: {} IDS:yes".format(
# connection_section_connection['@remote_hostname'])
# )
yield({'values': connection_section_connection['@remote_hostname'], 'type': 'hostname', 'to_ids': True, 'comment': ''})
if 'http_command' in connection_section_connection:
for http_command in connection_section_connection['http_command']:
# print('connection_section_connection HTTP COMMAND: {}\t{}'.format(
# http_command['@method'], # comment
# http_command['@url']) # url
# )
val = cleanup_url(http_command['@url'])
if val:
yield({'values': val, 'type': 'url', 'categories': 'Network activity', 'to_ids': True, 'comment': http_command['@method']})
if 'http_header' in connection_section_connection:
for http_header in connection_section_connection['http_header']:
if 'User-Agent:' in http_header['@header']:
val = http_header['@header'][len('User-Agent: '):]
yield({'values': val, 'type': 'user-agent', 'categories': 'Network activity', 'to_ids': False, 'comment': ''})
elif 'Host:' in http_header['@header']:
val = http_header['@header'][len('Host: '):]
if ':' in val:
try:
val_port = int(val.split(':')[1])
except ValueError as e:
val_port = False
val_hostname = cleanup_hostname(val.split(':')[0])
val_ip = cleanup_ip(val.split(':')[0])
if val_hostname and val_port:
val_combined = '{}|{}'.format(val_hostname, val_port)
# print({'values': val_combined, 'type': 'hostname|port', 'to_ids': True, 'comment': ''})
yield({'values': val_combined, 'type': 'hostname|port', 'to_ids': True, 'comment': ''})
elif val_ip and val_port:
val_combined = '{}|{}'.format(val_ip, val_port)
# print({'values': val_combined, 'type': 'ip-dst|port', 'to_ids': True, 'comment': ''})
yield({'values': val_combined, 'type': 'ip-dst|port', 'to_ids': True, 'comment': ''})
else:
continue
val_hostname = cleanup_hostname(val)
if val_hostname:
# print({'values': val_hostname, 'type': 'hostname', 'to_ids': True, 'comment': ''})
yield({'values': val_hostname, 'type': 'hostname', 'to_ids': True, 'comment': ''})
else:
# LATER header not processed
pass
if 'filesystem_section' in process and 'create_file' in process['filesystem_section']:
for filesystem_section_create_file in process['filesystem_section']['create_file']:
# first skip some items
if filesystem_section_create_file['@create_disposition'] in {'FILE_OPEN_IF'}:
continue
# FIXME - this section is probably not needed considering the 'stored_files stored_created_file' section we process later.
# print('CREATE FILE: {}\t{}'.format(
# filesystem_section_create_file['@srcfile'], # filename
# filesystem_section_create_file['@create_disposition']) # comment - use this to filter out cases
# )
if 'networkoperation_section' in process and 'dns_request_by_addr' in process['networkoperation_section']:
for networkoperation_section_dns_request_by_addr in process['networkoperation_section']['dns_request_by_addr']:
# FIXME - it's unclear what this section is for.
# TODO filter this
# print('DNS REQUEST: {}\t{}'.format(
# networkoperation_section_dns_request_by_addr['@request_address'], # ip-dst
# networkoperation_section_dns_request_by_addr['@result_name']) # hostname
# ) # => NOT hostname|ip
pass
if 'networkoperation_section' in process and 'dns_request_by_name' in process['networkoperation_section']:
for networkoperation_section_dns_request_by_name in process['networkoperation_section']['dns_request_by_name']:
networkoperation_section_dns_request_by_name['@request_name'] = cleanup_hostname(networkoperation_section_dns_request_by_name['@request_name'].rstrip('.'))
networkoperation_section_dns_request_by_name['@result_addresses'] = cleanup_ip(networkoperation_section_dns_request_by_name['@result_addresses'])
if networkoperation_section_dns_request_by_name['@request_name'] and networkoperation_section_dns_request_by_name['@result_addresses']:
val = '{}|{}'.format(networkoperation_section_dns_request_by_name['@request_name'],
networkoperation_section_dns_request_by_name['@result_addresses'])
# print("networkoperation_section_dns_request_by_name hostname|ip: {}|{} IDS:yes".format(
# networkoperation_section_dns_request_by_name['@request_name'],
# networkoperation_section_dns_request_by_name['@result_addresses'])
# )
yield({'values': val, 'type': 'domain|ip', 'categories': 'Network activity', 'to_ids': True, 'comment': ''})
elif networkoperation_section_dns_request_by_name['@request_name']:
# print("networkoperation_section_dns_request_by_name hostname: {} IDS:yes".format(
# networkoperation_section_dns_request_by_name['@request_name'])
# )
yield({'values': networkoperation_section_dns_request_by_name['@request_name'], 'type': 'hostname', 'to_ids': True, 'comment': ''})
elif networkoperation_section_dns_request_by_name['@result_addresses']:
# this happens when the IP is both in the request_name and result_address.
# print("networkoperation_section_dns_request_by_name hostname: {} IDS:yes".format(
# networkoperation_section_dns_request_by_name['@result_addresses'])
# )
yield({'values': networkoperation_section_dns_request_by_name['@result_addresses'], 'type': 'ip-dst', 'to_ids': True, 'comment': ''})
if 'networkpacket_section' in process and 'connect_to_computer' in process['networkpacket_section']:
for networkpacket_section_connect_to_computer in process['networkpacket_section']['connect_to_computer']:
networkpacket_section_connect_to_computer['@remote_hostname'] = cleanup_hostname(networkpacket_section_connect_to_computer['@remote_hostname'])
networkpacket_section_connect_to_computer['@remote_ip'] = cleanup_ip(networkpacket_section_connect_to_computer['@remote_ip'])
if networkpacket_section_connect_to_computer['@remote_hostname'] and networkpacket_section_connect_to_computer['@remote_ip']:
# print("networkpacket_section_connect_to_computer hostname|ip: {}|{} IDS:yes COMMENT:port {}".format(
# networkpacket_section_connect_to_computer['@remote_hostname'],
# networkpacket_section_connect_to_computer['@remote_ip'],
# networkpacket_section_connect_to_computer['@remote_port'])
# )
val_combined = "{}|{}".format(networkpacket_section_connect_to_computer['@remote_hostname'], networkpacket_section_connect_to_computer['@remote_ip'])
yield({'values': val_combined, 'type': 'hostname|ip', 'to_ids': True, 'comment': ''})
elif networkpacket_section_connect_to_computer['@remote_hostname']:
# print("networkpacket_section_connect_to_computer hostname: {} IDS:yes COMMENT:port {}".format(
# networkpacket_section_connect_to_computer['@remote_hostname'],
# networkpacket_section_connect_to_computer['@remote_port'])
# )
val_combined = "{}|{}".format(networkpacket_section_connect_to_computer['@remote_hostname'], networkpacket_section_connect_to_computer['@remote_port'])
yield({'values': val_combined, 'type': 'hostname|port', 'to_ids': True, 'comment': ''})
elif networkpacket_section_connect_to_computer['@remote_ip']:
# print("networkpacket_section_connect_to_computer ip-dst: {} IDS:yes COMMENT:port {}".format(
# networkpacket_section_connect_to_computer['@remote_ip'],
# networkpacket_section_connect_to_computer['@remote_port'])
# )
val_combined = "{}|{}".format(networkpacket_section_connect_to_computer['@remote_ip'], networkpacket_section_connect_to_computer['@remote_port'])
yield({'values': val_combined, 'type': 'ip-dst|port', 'to_ids': True, 'comment': ''})
if 'registry_section' in process and 'create_key' in process['registry_section']:
# FIXME this is a complicated section, together with the 'set_value'.
# it looks like this section is not ONLY about creating registry keys,
# more about accessing a handle to keys (with specific permissions)
# maybe we don't want to keep this, in favor of 'set_value'
for create_key in process['registry_section']['create_key']:
# print('REG CREATE: {}\t{}'.format(
# create_key['@desired_access'],
# create_key['@key_name']))
pass
if 'registry_section' in process and 'delete_key' in process['registry_section']:
# LATER we probably don't want to keep this. Much pollution.
# Maybe for later once we have filtered out this.
for delete_key in process['registry_section']['delete_key']:
# print('REG DELETE: {}'.format(
# delete_key['@key_name'])
# )
pass
if 'registry_section' in process and 'set_value' in process['registry_section']:
# FIXME this is a complicated section, together with the 'create_key'.
for set_value in process['registry_section']['set_value']:
# '@data_type' == 'REG_BINARY',
# '@data_type' == 'REG_DWORD',
# '@data_type' == 'REG_EXPAND_SZ',
# '@data_type' == 'REG_MULTI_SZ',
# '@data_type' == 'REG_NONE',
# '@data_type' == 'REG_QWORD',
# '@data_type' == 'REG_SZ',
regkey = cleanup_regkey("{}\\{}".format(set_value['@key_name'], set_value['@value_name']))
regdata = cleanup_regdata(set_value.get('@data'))
if not regkey:
continue
if set_value['@data_size'] == '0' or not regdata:
# print('registry_section set_value REG SET: {}\t{}\t{}'.format(
# set_value['@data_type'],
# set_value['@key_name'],
# set_value['@value_name'])
# )
yield({'values': regkey, 'type': 'regkey', 'to_ids': True,
'categories': ['External analysis', 'Persistence mechanism', 'Artifacts dropped'], 'comment': set_value['@data_type']})
else:
try:
# unicode fun...
# print('registry_section set_value REG SET: {}\t{}\t{}\t{}'.format(
# set_value['@data_type'],
# set_value['@key_name'],
# set_value['@value_name'],
# set_value['@data'])
# )
val = "{}|{}".format(regkey, regdata)
yield({'values': val, 'type': 'regkey|value', 'to_ids': True,
'categories': ['External analysis', 'Persistence mechanism', 'Artifacts dropped'], 'comment': set_value['@data_type']})
except Exception as e:
print("EXCEPTION registry_section {}".format(e))
# TODO - maybe we want to handle these later, or not...
pass
pass
if 'stored_files' in process and 'stored_created_file' in process['stored_files']:
for stored_created_file in process['stored_files']['stored_created_file']:
stored_created_file['@filename'] = cleanup_filepath(stored_created_file['@filename'])
if stored_created_file['@filename']:
if stored_created_file['@filesize'] is not '0':
val = '{}|{}'.format(stored_created_file['@filename'], stored_created_file['@md5'])
# print("stored_created_file filename|md5: {}|{} IDS:yes".format(
# stored_created_file['@filename'], # filename
# stored_created_file['@md5']) # md5
# ) # => filename|md5
yield({'values': val, 'type': 'filename|md5', 'to_ids': True,
'categories': ['Artifacts dropped', 'Payload delivery'], 'comment': ''})
else:
# print("stored_created_file filename: {} IDS:yes".format(
# stored_created_file['@filename']) # filename
# ) # => filename
yield({'values': stored_created_file['@filename'],
'type': 'filename', 'to_ids': True,
'categories': ['Artifacts dropped', 'Payload delivery'], 'comment': ''})
if 'stored_files' in process and 'stored_modified_file' in process['stored_files']:
for stored_modified_file in process['stored_files']['stored_modified_file']:
stored_modified_file['@filename'] = cleanup_filepath(stored_modified_file['@filename'])
if stored_modified_file['@filename']:
if stored_modified_file['@filesize'] is not '0':
val = '{}|{}'.format(stored_modified_file['@filename'], stored_modified_file['@md5'])
# print("stored_modified_file MODIFY FILE: {}\t{}".format(
# stored_modified_file['@filename'], # filename
# stored_modified_file['@md5']) # md5
# ) # => filename|md5
yield({'values': val, 'type': 'filename|md5', 'to_ids': True,
'categories': ['Artifacts dropped', 'Payload delivery'],
'comment': 'modified'})
else:
# print("stored_modified_file MODIFY FILE: {}\t{}".format(
# stored_modified_file['@filename']) # filename
# ) # => filename
yield({'values': stored_modified_file['@filename'], 'type': 'filename', 'to_ids': True,
'categories': ['Artifacts dropped', 'Payload delivery'],
'comment': 'modified'})
def add_file(filename, results, hash, index, filedata=None):
pass
# results.append({'values': filename, 'data': "{}|{}".format(filename, filedata.decode()), 'type': 'malware-sample',
# 'categories': ['Artifacts dropped', 'Payload delivery']})
def add_file_zip():
# if 'malware-sample' in request:
# sample_filename = request.get("malware-sample").split("|", 1)[0]
# data = base64.b64decode(data)
# fl = io.BytesIO(data)
# zf = zipfile.ZipFile(fl)
# sample_hashname = zf.namelist()[0]
# data = zf.read(sample_hashname, b"infected")
# zf.close()
pass
def print_json(data):
print(json.dumps(data, sort_keys=True, indent=4, separators=(',', ': ')))
def list_in_string(lst, data, regex=False):
for item in lst:
if regex:
if re.search(item, data, flags=re.IGNORECASE):
return True
else:
if item in data:
return True
def cleanup_ip(item):
# you should exclude private IP ranges via import regexes
noise_substrings = {
'224.0.0.',
'127.0.0.',
'8.8.8.8',
'8.8.4.4',
'0.0.0.0',
'NONE'
}
if list_in_string(noise_substrings, item):
return None
try:
ipaddress.ip_address(item)
return item
except ValueError:
return None
def cleanup_hostname(item):
noise_substrings = {
'wpad',
'teredo.ipv6.microsoft.com',
'WIN7SP1-x64-UNP'
}
# take away common known bad
if list_in_string(noise_substrings, item):
return None
# eliminate IP addresses
try:
ipaddress.ip_address(item)
except ValueError:
# this is not an IP, so continue
return item
return None
def cleanup_url(item):
if item in ['/']:
return None
return item
def cleanup_filepath(item):
noise_substrings = {
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'\\AppData\\Local\\GDIPFONTCACHEV1.DAT',
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'\\AppData\\Local\\Microsoft\\Internet Explorer\\DOMStore\\',
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'\\AppData\\Local\\Microsoft\\Internet Explorer\\Recovery\\High\\',
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'\\AppData\\Local\\Microsoft\\Windows\\Caches\\',
'\\AppData\\Local\\Microsoft\\Windows\\Explorer\\thumbcache',
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'\\AppData\\Local\\Microsoft\\Windows\\History\\History.',
'\\AppData\\Local\\Microsoft\\Windows\\Temporary Internet Files\\Content.',
'\\AppData\\Local\\Microsoft\\Windows\\WebCache\\',
'\\AppData\\Local\\Temp\\.*tmp$',
'\\AppData\\LocalLow\\Microsoft\\CryptnetUrlCache\\',
'\\AppData\\LocalLow\\Microsoft\\Internet Explorer\\Services\\search_',
'\\AppData\\Roaming\\Microsoft\\Office\\Recent\\',
'\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\',
'\\AppData\\Roaming\\Microsoft\\Windows\\Recent\\',
'C:\\ProgramData\\Microsoft\\OfficeSoftwareProtectionPlatform\\Cache\\cache.dat',
'C:\\Windows\\Prefetch\\',
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'\\AppData\\Roaming\\Adobe\\Acrobat\\9.0\\SharedDataEvents-journal',
'\\AppData\\Roaming\\Adobe\\Acrobat\\9.0\\UserCache.bin',
'\\AppData\\Roaming\\Macromedia\\Flash Player\\macromedia.com\\support\\flashplayer\\sys\\settings.sol',
'\\AppData\\Roaming\Adobe\\Flash Player\\NativeCache\\',
'C:\\Windows\\AppCompat\\Programs\\',
'C:\~' # caused by temp file created by MS Office when opening malicious doc/xls/...
}
if list_in_string(noise_substrings, item):
return None
return item
def cleanup_regkey(item):
noise_substrings = {
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r'\\CurrentVersion\\Explorer\\FileExts\\[a-z\.]+\\OpenWith',
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r'\\CurrentVersion\\Explorer\\RecentDocs\\',
r'\\CurrentVersion\\Explorer\\UserAssist\\',
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r'\\Local Settings\\Software\\Microsoft\\Windows\\Shell\\Bag',
r'\\Software\\Classes\\CLSID\\',
r'\\Software\\Classes\\Local Settings\\MuiCache\\',
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r'\\Software\\Microsoft\\Internet Explorer\\Main\\WindowsSearch',
r'\\Software\\Microsoft\\Office\\[0-9\.]+\\',
r'\\Software\\Microsoft\\Office\\Common\\Smart Tag\\',
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r'\\Software\\Microsoft\\OfficeSoftwareProtectionPlatform\\',
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r'\\Software\\Microsoft\\Shared Tools\\Panose\\',
r'\\Software\\Microsoft\\Tracing\\',
r'\\Software\\Microsoft\\Tracing\\powershell_RASAPI32\\',
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r'\\Software\\Microsoft\\Tracing\\powershell_RASMANCS\\',
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r'\\Software\\Microsoft\\Windows\\CurrentVersion\\Action Center\\',
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r'\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\RunMRU\\',
r'\\Software\\Microsoft\\Windows\\CurrentVersion\\Installer\\UserData\\',
r'\\Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings\\',
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r'\\System\\CurrentControlSet\\Services\\RdyBoost\\',
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r'\\Usage\\SpellingAndGrammarFiles'
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}
if list_in_string(noise_substrings, item, regex=True):
return None
return item
def cleanup_regdata(item):
if not item:
return None
item = item.replace('(UNICODE_0x00000000)', '')
return item
def get_zipped_contents(filename, data, password=None):
with zipfile.ZipFile(io.BytesIO(data), 'r') as zf:
unzipped_files = []
if password is not None:
password = str.encode(password) # Byte encoded password required
for zip_file_name in zf.namelist(): # Get all files in the zip file
# print(zip_file_name)
with zf.open(zip_file_name, mode='r', pwd=password) as fp:
file_data = fp.read()
unzipped_files.append({'values': zip_file_name,
'data': file_data,
'comment': 'Extracted from {0}'.format(filename)})
# print("{} : {}".format(zip_file_name, len(file_data)))
return unzipped_files
def introspection():
modulesetup = {}
try:
userConfig
modulesetup['userConfig'] = userConfig
except NameError:
pass
try:
inputSource
modulesetup['inputSource'] = inputSource
except NameError:
pass
return modulesetup
def version():
moduleinfo['config'] = moduleconfig
return moduleinfo