add: Parsing apk samples and their permissions

pull/322/head
chrisr3d 3 years ago
parent fc8a573ba7
commit 5602cf1759
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GPG Key ID: 6BBED1B63A6D639F
  1. 53
      misp_modules/lib/joe_parser.py

@ -5,6 +5,7 @@ from pymisp import MISPAttribute, MISPEvent, MISPObject
import json
arch_type_mapping = {'ANDROID': 'parse_apk', 'WINDOWS': 'parse_pe'}
domain_object_mapping = {'@ip': ('ip-dst', 'ip'), '@name': ('domain', 'domain')}
dropped_file_mapping = {'@entropy': ('float', 'entropy'),
'@file': ('filename', 'filename'),
@ -27,17 +28,17 @@ pe_object_mapping = {'CompanyName': 'company-name', 'FileDescription': 'file-des
'LegalCopyright': 'legal-copyright', 'OriginalFilename': 'original-filename',
'ProductName': 'product-filename', 'ProductVersion': 'product-version',
'Translation': 'lang-id'}
pe_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')}
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')}
@ -209,10 +210,29 @@ class JoeParser():
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]})
if not fileinfo.get('pe'):
try:
to_call = arch_type_mapping[self.data['generalinfo']['arch']]
getattr(self, to_call)(fileinfo[to_call.split('_')[-1]], file_object)
except KeyError:
self.misp_event.add_object(**file_object)
return
peinfo = fileinfo['pe']
def parse_apk(self, apkinfo, fileobject):
self.misp_event.add_object(**file_object)
permission_lists = defaultdict(list)
for permission in apkinfo['requiredpermissions']['permission']:
permission = permission['@name'].split('.')
permission_lists[' '.join(permission[:-1])].append(permission[-1])
attribute_type = 'text'
for comment, permissions in permission_lists.items():
permission_object = MISPObject('android-permission')
permission_object.add_attribute('comment', **dict(type=attribute_type, value=comment))
for permission in permissions:
permission_object.add_attribute('permission', **dict(type=attribute_type, value=permission))
self.misp_event.add_object(**permission_object)
self.references[file_object.uuid].append(dict(referenced_uuid=permission_object.uuid,
relationship_type='grants'))
def parse_pe(self, peinfo, file_object):
pe_object = MISPObject('pe')
file_object.add_reference(pe_object.uuid, 'included-in')
self.misp_event.add_object(**file_object)
@ -248,6 +268,14 @@ class JoeParser():
relationship_type='included-in'))
self.misp_event.add_object(**section_object)
def parse_pe_section(self, section):
section_object = MISPObject('pe-section')
for feature, mapping in pe_section_object_mapping.items():
if section.get(feature):
attribute_type, object_relation = mapping
section_object.add_attribute(object_relation, **{'type': attribute_type, 'value': section[feature]})
return section_object
def parse_network_interactions(self):
domaininfo = self.data['domaininfo']
if domaininfo:
@ -292,13 +320,6 @@ class JoeParser():
attribute.from_dict(**attribute_dict)
self.misp_event.add_attribute(**attribute)
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']:

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