Modules for expansion services, import and export in MISP http://misp.github.io/misp-modules
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from pymisp import MISPAttribute, MISPEvent, MISPObject
import json
import requests
misperrors = {'error': 'Error'}
mispattributes = {'input': ['hostname', 'domain', "ip-src", "ip-dst", "md5", "sha1", "sha256", "url"],
'format': 'misp_standard'}
moduleinfo = {'version': '1', 'author': 'Christian Studer',
'description': 'Get information from VirusTotal public API v2.',
'module-type': ['expansion', 'hover']}
moduleconfig = ['apikey']
class VirusTotalParser():
def __init__(self):
super(VirusTotalParser, self).__init__()
self.misp_event = MISPEvent()
def declare_variables(self, apikey, attribute):
self.attribute = MISPAttribute()
self.attribute.from_dict(**attribute)
self.apikey = apikey
def get_result(self):
event = json.loads(self.misp_event.to_json())
results = {key: event[key] for key in ('Attribute', 'Object') if (key in event and event[key])}
return {'results': results}
def parse_urls(self, query_result):
for feature in ('detected_urls', 'undetected_urls'):
if feature in query_result:
for url in query_result[feature]:
value = url['url'] if isinstance(url, dict) else url[0]
self.misp_event.add_attribute('url', value)
def parse_resolutions(self, resolutions, subdomains=None, uuids=None):
domain_ip_object = MISPObject('domain-ip')
if self.attribute.type == 'domain':
domain_ip_object.add_attribute('domain', type='domain', value=self.attribute.value)
attribute_type, relation, key = ('ip-dst', 'ip', 'ip_address')
else:
domain_ip_object.add_attribute('ip', type='ip-dst', value=self.attribute.value)
attribute_type, relation, key = ('domain', 'domain', 'hostname')
for resolution in resolutions:
domain_ip_object.add_attribute(relation, type=attribute_type, value=resolution[key])
if subdomains:
for subdomain in subdomains:
attribute = MISPAttribute()
attribute.from_dict(**dict(type='domain', value=subdomain))
self.misp_event.add_attribute(**attribute)
domain_ip_object.add_reference(attribute.uuid, 'subdomain')
if uuids:
for uuid in uuids:
domain_ip_object.add_reference(uuid, 'sibling-of')
self.misp_event.add_object(**domain_ip_object)
def parse_vt_object(self, query_result):
if query_result['response_code'] == 1:
vt_object = MISPObject('virustotal-report')
vt_object.add_attribute('permalink', type='link', value=query_result['permalink'])
detection_ratio = '{}/{}'.format(query_result['positives'], query_result['total'])
vt_object.add_attribute('detection-ratio', type='text', value=detection_ratio)
self.misp_event.add_object(**vt_object)
def get_query_result(self, query_type):
params = {query_type: self.attribute.value, 'apikey': self.apikey}
return requests.get(self.base_url, params=params)
class DomainQuery(VirusTotalParser):
def __init__(self, apikey, attribute):
super(DomainQuery, self).__init__()
self.base_url = "https://www.virustotal.com/vtapi/v2/domain/report"
self.declare_variables(apikey, attribute)
def parse_report(self, query_result):
hash_type = 'sha256'
whois = 'whois'
for feature_type in ('referrer', 'downloaded', 'communicating'):
for feature in ('undetected_{}_samples', 'detected_{}_samples'):
for sample in query_result.get(feature.format(feature_type), []):
self.misp_event.add_attribute(hash_type, sample[hash_type])
if query_result.get(whois):
whois_object = MISPObject(whois)
whois_object.add_attribute('text', type='text', value=query_result[whois])
self.misp_event.add_object(**whois_object)
if 'domain_siblings' in query_result:
siblings = (self.parse_siblings(domain) for domain in query_result['domain_siblings'])
if 'subdomains' in query_result:
self.parse_resolutions(query_result['resolutions'], query_result['subdomains'], siblings)
self.parse_urls(query_result)
def parse_siblings(self, domain):
attribute = MISPAttribute()
attribute.from_dict(**dict(type='domain', value=domain))
self.misp_event.add_attribute(**attribute)
return attribute.uuid
class HashQuery(VirusTotalParser):
def __init__(self, apikey, attribute):
super(HashQuery, self).__init__()
self.base_url = "https://www.virustotal.com/vtapi/v2/file/report"
self.declare_variables(apikey, attribute)
def parse_report(self, query_result):
file_attributes = []
for hash_type in ('md5', 'sha1', 'sha256'):
if query_result.get(hash_type):
file_attributes.append({'type': hash_type, 'object_relation': hash_type,
'value': query_result[hash_type]})
if file_attributes:
file_object = MISPObject('file')
for attribute in file_attributes:
file_object.add_attribute(**attribute)
self.misp_event.add_object(**file_object)
self.parse_vt_object(query_result)
class IpQuery(VirusTotalParser):
def __init__(self, apikey, attribute):
super(IpQuery, self).__init__()
self.base_url = "https://www.virustotal.com/vtapi/v2/ip-address/report"
self.declare_variables(apikey, attribute)
def parse_report(self, query_result):
if query_result.get('asn'):
asn_mapping = {'network': ('ip-src', 'subnet-announced'),
'country': ('text', 'country')}
asn_object = MISPObject('asn')
asn_object.add_attribute('asn', type='AS', value=query_result['asn'])
for key, value in asn_mapping.items():
if query_result.get(key):
attribute_type, relation = value
asn_object.add_attribute(relation, type=attribute_type, value=query_result[key])
self.misp_event.add_object(**asn_object)
self.parse_urls(query_result)
if query_result.get('resolutions'):
self.parse_resolutions(query_result['resolutions'])
class UrlQuery(VirusTotalParser):
def __init__(self, apikey, attribute):
super(UrlQuery, self).__init__()
self.base_url = "https://www.virustotal.com/vtapi/v2/url/report"
self.declare_variables(apikey, attribute)
def parse_report(self, query_result):
self.parse_vt_object(query_result)
domain = ('domain', DomainQuery)
ip = ('ip', IpQuery)
file = ('resource', HashQuery)
misp_type_mapping = {'domain': domain, 'hostname': domain, 'ip-src': ip,
'ip-dst': ip, 'md5': file, 'sha1': file, 'sha256': file,
'url': ('resource', UrlQuery)}
def parse_error(status_code):
status_mapping = {204: 'VirusTotal request rate limit exceeded.',
400: 'Incorrect request, please check the arguments.',
403: 'You don\'t have enough privileges to make the request.'}
if status_code in status_mapping:
return status_mapping[status_code]
return "VirusTotal may not be accessible."
def handler(q=False):
if q is False:
return False
request = json.loads(q)
if not request.get('config') or not request['config'].get('apikey'):
misperrors['error'] = "A VirusTotal api key is required for this module."
return misperrors
attribute = request['attribute']
query_type, to_call = misp_type_mapping[attribute['type']]
parser = to_call(request['config']['apikey'], attribute)
query_result = parser.get_query_result(query_type)
status_code = query_result.status_code
if status_code == 200:
parser.parse_report(query_result.json())
else:
misperrors['error'] = parse_error(status_code)
return misperrors
return parser.get_result()
def introspection():
return mispattributes
def version():
moduleinfo['config'] = moduleconfig
return moduleinfo