2019-02-04 11:05:51 +01:00
|
|
|
import requests
|
|
|
|
import json
|
|
|
|
import sys
|
2020-07-28 11:47:53 +02:00
|
|
|
from . import check_input_attribute, standard_error_message
|
2019-11-05 16:43:03 +01:00
|
|
|
from collections import defaultdict
|
|
|
|
from pymisp import MISPAttribute, MISPEvent, MISPObject
|
|
|
|
from requests.auth import HTTPBasicAuth
|
2019-02-04 11:05:51 +01:00
|
|
|
|
|
|
|
sys.path.append('./')
|
|
|
|
|
|
|
|
misperrors = {'error': 'Error'}
|
2019-11-05 16:43:03 +01:00
|
|
|
mispattributes = {'input': ['ip-src', 'ip-dst', 'vulnerability', 'md5', 'sha1', 'sha256', 'domain', 'hostname', 'url'],
|
|
|
|
'output': ['ip-src', 'ip-dst', 'text', 'domain'],
|
|
|
|
'format': 'misp_standard'}
|
2019-02-04 11:05:51 +01:00
|
|
|
|
|
|
|
# possible module-types: 'expansion', 'hover' or both
|
2019-11-05 16:43:03 +01:00
|
|
|
moduleinfo = {'version': '2', 'author': 'Joerg Stephan (@johest)',
|
2019-02-04 11:05:51 +01:00
|
|
|
'description': 'IBM X-Force Exchange expansion module',
|
|
|
|
'module-type': ['expansion', 'hover']}
|
|
|
|
|
|
|
|
# config fields that your code expects from the site admin
|
2019-11-05 16:43:03 +01:00
|
|
|
moduleconfig = ["apikey", "apipassword"]
|
|
|
|
|
|
|
|
|
|
|
|
class XforceExchange():
|
|
|
|
def __init__(self, attribute, apikey, apipassword):
|
|
|
|
self.base_url = "https://api.xforce.ibmcloud.com"
|
|
|
|
self.misp_event = MISPEvent()
|
|
|
|
self.attribute = MISPAttribute()
|
|
|
|
self.attribute.from_dict(**attribute)
|
|
|
|
self._apikey = apikey
|
|
|
|
self._apipassword = apipassword
|
|
|
|
self.result = {}
|
|
|
|
self.objects = defaultdict(dict)
|
|
|
|
self.status_mapping = {403: "Access denied, please check if your authentication is valid and if you did not reach the limit of queries.",
|
|
|
|
404: "No result found for your query."}
|
|
|
|
|
|
|
|
def parse(self):
|
|
|
|
mapping = {'url': '_parse_url', 'vulnerability': '_parse_vulnerability'}
|
|
|
|
mapping.update(dict.fromkeys(('md5', 'sha1', 'sha256'), '_parse_hash'))
|
|
|
|
mapping.update(dict.fromkeys(('domain', 'hostname'), '_parse_dns'))
|
|
|
|
mapping.update(dict.fromkeys(('ip-src', 'ip-dst'), '_parse_ip'))
|
|
|
|
to_call = mapping[self.attribute.type]
|
|
|
|
getattr(self, to_call)(self.attribute.value)
|
|
|
|
|
|
|
|
def get_result(self):
|
|
|
|
if not self.misp_event.objects:
|
|
|
|
if 'error' not in self.result:
|
|
|
|
self.result['error'] = "No additional data found on Xforce Exchange."
|
|
|
|
return self.result
|
|
|
|
self.misp_event.add_attribute(**self.attribute)
|
|
|
|
event = json.loads(self.misp_event.to_json())
|
|
|
|
result = {key: event[key] for key in ('Attribute', 'Object') if (key in event and event[key])}
|
|
|
|
return {'results': result}
|
|
|
|
|
|
|
|
def _api_call(self, url):
|
|
|
|
try:
|
|
|
|
result = requests.get(url, auth=HTTPBasicAuth(self._apikey, self._apipassword))
|
|
|
|
except Exception as e:
|
|
|
|
self.result['error'] = e
|
|
|
|
return
|
|
|
|
status_code = result.status_code
|
|
|
|
if status_code != 200:
|
|
|
|
try:
|
|
|
|
self.result['error'] = self.status_mapping[status_code]
|
|
|
|
except KeyError:
|
|
|
|
self.result['error'] = 'An error with the API has occurred.'
|
|
|
|
return
|
|
|
|
return result.json()
|
|
|
|
|
|
|
|
def _create_file(self, malware, relationship):
|
|
|
|
file_object = MISPObject('file')
|
|
|
|
for key, relation in zip(('filepath', 'md5'), ('filename', 'md5')):
|
|
|
|
file_object.add_attribute(relation, malware[key])
|
|
|
|
file_object.add_reference(self.attribute.uuid, relationship)
|
|
|
|
return file_object
|
|
|
|
|
|
|
|
def _create_url(self, malware):
|
|
|
|
url_object = MISPObject('url')
|
|
|
|
for key, relation in zip(('uri', 'domain'), ('url', 'domain')):
|
|
|
|
url_object.add_attribute(relation, malware[key])
|
|
|
|
attributes = tuple(f'{attribute.object_relation}_{attribute.value}' for attribute in url_object.attributes)
|
|
|
|
if attributes in self.objects['url']:
|
|
|
|
del url_object
|
|
|
|
return self.objects['url'][attributes]
|
|
|
|
url_uuid = url_object.uuid
|
|
|
|
self.misp_event.add_object(**url_object)
|
|
|
|
self.objects['url'][attributes] = url_uuid
|
|
|
|
return url_uuid
|
|
|
|
|
|
|
|
def _fetch_types(self, value):
|
|
|
|
if self.attribute.type in ('ip-src', 'ip-dst'):
|
|
|
|
return 'ip', 'domain', self.attribute.value
|
|
|
|
return 'domain', 'ip', value
|
|
|
|
|
|
|
|
def _handle_file(self, malware, relationship):
|
|
|
|
file_object = self._create_file(malware, relationship)
|
|
|
|
attributes = tuple(f'{attribute.object_relation}_{attribute.value}' for attribute in file_object.attributes)
|
|
|
|
if attributes in self.objects['file']:
|
|
|
|
self.objects['file'][attributes].add_reference(self._create_url(malware), 'dropped-by')
|
|
|
|
del file_object
|
|
|
|
return
|
|
|
|
file_object.add_reference(self._create_url(malware), 'dropped-by')
|
|
|
|
self.objects['file'][attributes] = file_object
|
|
|
|
self.misp_event.add_object(**file_object)
|
|
|
|
|
|
|
|
def _parse_dns(self, value):
|
|
|
|
dns_result = self._api_call(f'{self.base_url}/resolve/{value}')
|
2019-11-18 00:00:19 +01:00
|
|
|
if dns_result.get('Passive') and dns_result['Passive'].get('records'):
|
2019-11-05 16:43:03 +01:00
|
|
|
itype, ftype, value = self._fetch_types(dns_result['Passive']['query'])
|
|
|
|
misp_object = MISPObject('domain-ip')
|
|
|
|
misp_object.add_attribute(itype, value)
|
|
|
|
for record in dns_result['Passive']['records']:
|
|
|
|
misp_object.add_attribute(ftype, record['value'])
|
|
|
|
misp_object.add_reference(self.attribute.uuid, 'related-to')
|
|
|
|
self.misp_event.add_object(**misp_object)
|
|
|
|
|
|
|
|
def _parse_hash(self, value):
|
|
|
|
malware_result = self._api_call(f'{self.base_url}/malware/{value}')
|
|
|
|
if malware_result and malware_result.get('malware'):
|
|
|
|
malware_report = malware_result['malware']
|
|
|
|
for malware in malware_report.get('origins', {}).get('CnCServers', {}).get('rows', []):
|
|
|
|
self._handle_file(malware, 'related-to')
|
|
|
|
|
|
|
|
def _parse_ip(self, value):
|
|
|
|
self._parse_dns(value)
|
|
|
|
self._parse_malware(value, 'ipr')
|
|
|
|
|
|
|
|
def _parse_malware(self, value, feature):
|
|
|
|
malware_result = self._api_call(f'{self.base_url}/{feature}/malware/{value}')
|
|
|
|
if malware_result and malware_result.get('malware'):
|
|
|
|
for malware in malware_result['malware']:
|
|
|
|
self._handle_file(malware, 'associated-with')
|
|
|
|
|
|
|
|
def _parse_url(self, value):
|
|
|
|
self._parse_dns(value)
|
|
|
|
self._parse_malware(value, 'url')
|
|
|
|
|
|
|
|
def _parse_vulnerability(self, value):
|
|
|
|
vulnerability_result = self._api_call(f'{self.base_url}/vulnerabilities/search/{value}')
|
|
|
|
if vulnerability_result:
|
|
|
|
for vulnerability in vulnerability_result:
|
|
|
|
misp_object = MISPObject('vulnerability')
|
|
|
|
for code in vulnerability['stdcode']:
|
|
|
|
misp_object.add_attribute('id', code)
|
|
|
|
for feature, relation in zip(('title', 'description', 'temporal_score'),
|
|
|
|
('summary', 'description', 'cvss-score')):
|
|
|
|
misp_object.add_attribute(relation, vulnerability[feature])
|
|
|
|
for reference in vulnerability['references']:
|
|
|
|
misp_object.add_attribute('references', reference['link_target'])
|
|
|
|
misp_object.add_reference(self.attribute.uuid, 'related-to')
|
|
|
|
self.misp_event.add_object(**misp_object)
|
2019-02-04 11:05:51 +01:00
|
|
|
|
|
|
|
|
|
|
|
def handler(q=False):
|
|
|
|
if q is False:
|
|
|
|
return False
|
2019-11-05 16:43:03 +01:00
|
|
|
request = json.loads(q)
|
|
|
|
if not request.get('config') or not (request['config'].get('apikey') and request['config'].get('apipassword')):
|
|
|
|
misperrors['error'] = 'An API authentication is required (key and password).'
|
|
|
|
return misperrors
|
|
|
|
key = request["config"]["apikey"]
|
|
|
|
password = request['config']['apipassword']
|
2020-07-28 11:47:53 +02:00
|
|
|
if not request.get('attribute') or not check_input_attribute(request['attribute']):
|
|
|
|
return {'error': f'{standard_error_message} which should contain at least a type, a value and an uuid.'}
|
|
|
|
if request['attribute']['type'] not in mispattributes['input']:
|
|
|
|
return {'error': 'Unsupported attribute type.'}
|
2019-11-05 16:43:03 +01:00
|
|
|
parser = XforceExchange(request['attribute'], key, password)
|
|
|
|
parser.parse()
|
|
|
|
return parser.get_result()
|
2019-02-04 11:05:51 +01:00
|
|
|
|
|
|
|
|
|
|
|
def introspection():
|
|
|
|
return mispattributes
|
|
|
|
|
|
|
|
|
|
|
|
def version():
|
|
|
|
moduleinfo['config'] = moduleconfig
|
|
|
|
return moduleinfo
|