Modules for expansion services, import and export in MISP http://misp.github.io/misp-modules
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# -*- coding: utf-8 -*-
from collections import defaultdict
from datetime import datetime
from pymisp import MISPAttribute, MISPEvent, MISPObject
import json
import base64
misperrors = {'error': 'Error'}
userConfig = {}
inputSource = ['file']
moduleinfo = {'version': '0.1', 'author': 'Christian Studer',
'description': 'Import for Joe Sandbox JSON reports',
'module-type': ['import']}
moduleconfig = []
dropped_file_mapping = {'@entropy': ('float', 'entropy'),
'@file': ('filename', 'filename'),
'@size': ('size-in-bytes', 'size-in-bytes'),
'@type': ('mime-type', 'mimetype')}
dropped_hash_mapping = {'MD5': 'md5', 'SHA': 'sha1', 'SHA-256': 'sha256', 'SHA-512': 'sha512'}
file_object_fields = ['filename', 'md5', 'sha1', 'sha256', 'sha512', 'ssdeep']
file_object_mapping = {'entropy': ('float', 'entropy'),
'filesize': ('size-in-bytes', 'size-in-bytes'),
'filetype': ('mime-type', 'mimetype')}
file_references_mapping = {'fileCreated': 'creates', 'fileDeleted': 'deletes',
'fileMoved': 'moves', 'fileRead': 'reads', 'fileWritten': 'writes'}
network_behavior_fields = ('srcip', 'dstip', 'srcport', 'dstport')
network_connection_object_mapping = {'srcip': ('ip-src', 'ip-src'), 'dstip': ('ip-dst', 'ip-dst'),
'srcport': ('port', 'src-port'), 'dstport': ('port', 'dst-port')}
pe_object_fields = {'entrypoint': ('text', 'entrypoint-address'),
'imphash': ('imphash', 'imphash')}
pe_object_mapping = {'CompanyName': 'company-name', 'FileDescription': 'file-description',
'FileVersion': 'file-version', 'InternalName': 'internal-filename',
'LegalCopyright': 'legal-copyright', 'OriginalFilename': 'original-filename',
'ProductName': 'product-filename', 'ProductVersion': 'product-version',
'Translation': 'lang-id'}
process_object_fields = {'cmdline': 'command-line', 'name': 'name',
'parentpid': 'parent-pid', 'pid': 'pid',
'path': 'current-directory'}
protocols = {'tcp': 4, 'udp': 4, 'icmp': 3,
'http': 7, 'https': 7, 'ftp': 7}
section_object_mapping = {'characteristics': ('text', 'characteristic'),
'entropy': ('float', 'entropy'),
'name': ('text', 'name'), 'rawaddr': ('hex', 'offset'),
'rawsize': ('size-in-bytes', 'size-in-bytes'),
'virtaddr': ('hex', 'virtual_address'),
'virtsize': ('size-in-bytes', 'virtual_size')}
registry_references_mapping = {'keyValueCreated': 'creates', 'keyValueModified': 'modifies'}
regkey_object_mapping = {'name': ('text', 'name'), 'newdata': ('text', 'data'),
'path': ('regkey', 'key')}
signerinfo_object_mapping = {'sigissuer': ('text', 'issuer'),
'version': ('text', 'version')}
class JoeParser():
def __init__(self, data):
self.data = data
self.misp_event = MISPEvent()
self.references = defaultdict(list)
self.attributes = defaultdict(lambda: defaultdict(set))
def parse_joe(self):
self.parse_fileinfo()
self.parse_system_behavior()
self.parse_network_behavior()
self.parse_dropped_files()
if self.attributes:
self.handle_attributes()
if self.references:
self.build_references()
self.finalize_results()
def build_references(self):
for misp_object in self.misp_event.objects:
object_uuid = misp_object.uuid
if object_uuid in self.references:
for reference in self.references[object_uuid]:
misp_object.add_reference(reference['idref'], reference['relationship'])
def handle_attributes(self):
for attribute_type, attribute in self.attributes.items():
for attribute_value, references in attribute.items():
attribute_uuid = self.create_attribute(attribute_type, attribute_value)
for reference in references:
source_uuid, relationship = reference
self.references[source_uuid].append({'idref': attribute_uuid, 'relationship': relationship})
def parse_dropped_files(self):
droppedinfo = self.data['droppedinfo']
if droppedinfo:
for droppedfile in droppedinfo['hash']:
file_object = MISPObject('file')
for key, mapping in dropped_file_mapping.items():
attribute_type, object_relation = mapping
file_object.add_attribute(object_relation, **{'type': attribute_type, 'value': droppedfile[key]})
if droppedfile['@malicious'] == 'true':
file_object.add_attribute('state', **{'type': 'text', 'value': 'Malicious'})
for h in droppedfile['value']:
hash_type = dropped_hash_mapping[h['@algo']]
file_object.add_attribute(hash_type, **{'type': hash_type, 'value': h['$']})
self.misp_event.add_object(**file_object)
def parse_network_behavior(self):
network = self.data['behavior']['network']
connections = defaultdict(lambda: defaultdict(set))
for protocol, layer in protocols.items():
if network.get(protocol):
for packet in network[protocol]['packet']:
timestamp = datetime.strptime(self.parse_timestamp(packet['timestamp']), '%B %d, %Y %H:%M:%S.%f')
connections[tuple(packet[field] for field in network_behavior_fields)][protocol].add(timestamp)
for connection, data in connections.items():
attributes = self.prefetch_attributes_data(connection)
if len(data.keys()) == len(set(protocols[protocol] for protocol in data.keys())):
network_connection_object = MISPObject('network-connection')
for object_relation, attribute in attributes.items():
network_connection_object.add_attribute(object_relation, **attribute)
network_connection_object.add_attribute('first-packet-seen',
**{'type': 'datetime', 'value': min(tuple(min(timestamp) for timestamp in data.values()))})
for protocol in data.keys():
network_connection_object.add_attribute('layer{}-protocol'.format(protocols[protocol]), **{'type': 'text', 'value': protocol})
self.misp_event.add_object(**network_connection_object)
self.references[self.fileinfo_uuid].append({'idref': network_connection_object.uuid, 'relationship': 'initiates'})
else:
for protocol, timestamps in data.items():
network_connection_object = MISPObject('network-connection')
for object_relation, attribute in attributes.items():
network_connection_object.add_attribute(object_relation, **attribute)
network_connection_object.add_attribute('first-packet-seen', **{'type': 'datetime', 'value': min(timestamps)})
network_connection_object.add_attribute('layer{}-protocol'.format(protocols[protocol]), **{'type': 'text', 'value': protocol})
self.misp_event.add_object(**network_connection_object)
self.references[self.fileinfo_uuid].append({'idref': network_connection_object.uuid, 'relationship': 'initiates'})
def parse_system_behavior(self):
system = self.data['behavior']['system']
if system.get('processes'):
process_activities = {'fileactivities': self.parse_fileactivities,
'registryactivities': self.parse_registryactivities}
for process in system['processes']['process']:
general = process['general']
process_object = MISPObject('process')
for feature, relation in process_object_fields.items():
process_object.add_attribute(relation, **{'type': 'text', 'value': general[feature]})
start_time = datetime.strptime('{} {}'.format(general['date'], general['time']), '%d/%m/%Y %H:%M:%S')
process_object.add_attribute('start-time', **{'type': 'datetime', 'value': start_time})
self.misp_event.add_object(**process_object)
for field, to_call in process_activities.items():
to_call(process_object.uuid, process[field])
self.references[self.fileinfo_uuid].append({'idref': process_object.uuid, 'relationship': 'calls'})
def parse_fileactivities(self, process_uuid, fileactivities):
for feature, files in fileactivities.items():
if files:
for call in files['call']:
self.attributes['filename'][call['path']].add((process_uuid, file_references_mapping[feature]))
def parse_fileinfo(self):
fileinfo = self.data['fileinfo']
file_object = MISPObject('file')
for field in file_object_fields:
file_object.add_attribute(field, **{'type': field, 'value': fileinfo[field]})
for field, mapping in file_object_mapping.items():
attribute_type, object_relation = mapping
file_object.add_attribute(object_relation, **{'type': attribute_type, 'value': fileinfo[field]})
self.fileinfo_uuid = file_object.uuid
if not fileinfo.get('pe'):
self.misp_event.add_object(**file_object)
return
peinfo = fileinfo['pe']
pe_object = MISPObject('pe')
file_object.add_reference(pe_object.uuid, 'included-in')
self.misp_event.add_object(**file_object)
for field, mapping in pe_object_fields.items():
attribute_type, object_relation = mapping
pe_object.add_attribute(object_relation, **{'type': attribute_type, 'value': peinfo[field]})
pe_object.add_attribute('compilation-timestamp', **{'type': 'datetime', 'value': int(peinfo['timestamp'].split()[0], 16)})
program_name = fileinfo['filename']
if peinfo['versions']:
for feature in peinfo['versions']['version']:
name = feature['name']
if name == 'InternalName':
program_name = feature['value']
pe_object.add_attribute(pe_object_mapping[name], **{'type': 'text', 'value': feature['value']})
sections_number = len(peinfo['sections']['section'])
pe_object.add_attribute('number-sections', **{'type': 'counter', 'value': sections_number})
signatureinfo = peinfo['signature']
if signatureinfo['signed']:
signerinfo_object = MISPObject('authenticode-signerinfo')
pe_object.add_reference(signerinfo_object.uuid, 'signed-by')
self.misp_event.add_object(**pe_object)
signerinfo_object.add_attribute('program-name', **{'type': 'text', 'value': program_name})
for feature, mapping in signerinfo_object_mapping.items():
attribute_type, object_relation = mapping
signerinfo_object.add_attribute(object_relation, **{'type': attribute_type, 'value': signatureinfo[feature]})
self.misp_event.add_object(**signerinfo_object)
else:
self.misp_event.add_object(**pe_object)
for section in peinfo['sections']['section']:
section_object = self.parse_pe_section(section)
self.references[pe_object.uuid].append({'idref': section_object.uuid, 'relationship': 'included-in'})
self.misp_event.add_object(**section_object)
def parse_pe_section(self, section):
section_object = MISPObject('pe-section')
for feature, mapping in section_object_mapping.items():
attribute_type, object_relation = mapping
section_object.add_attribute(object_relation, **{'type': attribute_type, 'value': section[feature]})
return section_object
def parse_registryactivities(self, process_uuid, registryactivities):
if registryactivities['keyCreated']:
for call in registryactivities['keyCreated']['call']:
self.attributes['regkey'][call['path']].add((process_uuid, 'creates'))
for feature, relationship_type in registry_references_mapping.items():
if registryactivities[feature]:
for call in registryactivities[feature]['call']:
registry_key = MISPObject('registry-key')
for field, mapping in regkey_object_mapping.items():
attribute_type, object_relation = mapping
registry_key.add_attribute(object_relation, **{'type': attribute_type, 'value': call[field]})
registry_key.add_attribute('data-type', **{'type': 'text', 'value': 'REG_{}'.format(call['type'].upper())})
self.misp_event.add_object(**registry_key)
self.references[process_uuid].append({'idref': registry_key.uuid, 'relationship': relationship_type})
def create_attribute(self, attribute_type, attribute_value):
attribute = MISPAttribute()
attribute.from_dict(**{'type': attribute_type, 'value': attribute_value})
self.misp_event.add_attribute(**attribute)
return attribute.uuid
def finalize_results(self):
event = json.loads(self.misp_event.to_json())['Event']
self.results = {key: event[key] for key in ('Attribute', 'Object') if (key in event and event[key])}
@staticmethod
def parse_timestamp(timestamp):
timestamp = timestamp.split(':')
timestamp[-1] = str(round(float(timestamp[-1].split(' ')[0]), 6))
return ':'.join(timestamp)
@staticmethod
def prefetch_attributes_data(connection):
attributes = {}
for field, value in zip(network_behavior_fields, connection):
attribute_type, object_relation = network_connection_object_mapping[field]
attributes[object_relation] = {'type': attribute_type, 'value': value}
return attributes
def handler(q=False):
if q is False:
return False
q = json.loads(q)
data = base64.b64decode(q.get('data')).decode('utf-8')
if not data:
return json.dumps({'success': 0})
joe_data = json.loads(data)['analysis']
joe_parser = JoeParser(joe_data)
joe_parser.parse_joe()
return {'results': joe_parser.results}
def introspection():
modulesetup = {}
try:
userConfig
modulesetup['userConfig'] = userConfig
except NameError:
pass
try:
inputSource
modulesetup['inputSource'] = inputSource
except NameError:
pass
modulesetup['format'] = 'misp_standard'
return modulesetup
def version():
moduleinfo['config'] = moduleconfig
return moduleinfo