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Merge pull request #560 from VirusTotal/feat/virustotal-modules-api-v3 

VirusTotal modules migration to API v3
pull/564/head
Alexandre Dulaunoy 2022-03-18 14:58:30 +01:00 committed by GitHub
parent 38047f2718 ac704c8c99
commit 7d317d3c9c
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2 changed files with 368 additions and 365 deletions
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302
misp_modules/modules/expansion/virustotal.py
View File

@ -1,6 +1,6 @@
import json
import requests
from urllib.parse import urlparse
import vt
from . import check_input_attribute, standard_error_message
from pymisp import MISPAttribute, MISPEvent, MISPObject
@ -9,20 +9,23 @@ mispattributes = {'input': ['hostname', 'domain', "ip-src", "ip-dst", "md5", "sh
'format': 'misp_standard'}
# possible module-types: 'expansion', 'hover' or both
moduleinfo = {'version': '4', 'author': 'Hannah Ward',
'description': 'Get information from VirusTotal',
moduleinfo = {'version': '5', 'author': 'Hannah Ward',
'description': 'Enrich observables with the VirusTotal v3 API',
'module-type': ['expansion']}
# config fields that your code expects from the site admin
moduleconfig = ["apikey", "event_limit", 'proxy_host', 'proxy_port', 'proxy_username', 'proxy_password']
class VirusTotalParser(object):
def __init__(self, apikey, limit):
self.apikey = apikey
self.limit = limit
self.base_url = "https://www.virustotal.com/vtapi/v2/{}/report"
DEFAULT_RESULTS_LIMIT = 10
class VirusTotalParser:
def __init__(self, client: vt.Client, limit: int) -> None:
self.client = client
self.limit = limit or DEFAULT_RESULTS_LIMIT
self.misp_event = MISPEvent()
self.attribute = MISPAttribute()
self.parsed_objects = {}
self.input_types_mapping = {'ip-src': self.parse_ip, 'ip-dst': self.parse_ip,
'domain': self.parse_domain, 'hostname': self.parse_domain,
@ -30,158 +33,150 @@ class VirusTotalParser(object):
'sha256': self.parse_hash, 'url': self.parse_url}
self.proxies = None
def query_api(self, attribute):
self.attribute = MISPAttribute()
self.attribute.from_dict(**attribute)
return self.input_types_mapping[self.attribute.type](self.attribute.value, recurse=True)
@staticmethod
def get_total_analysis(analysis: dict, known_distributors: dict = None) -> int:
if not analysis:
return 0
count = sum([analysis['undetected'], analysis['suspicious'], analysis['harmless']])
return count if known_distributors else count + analysis['malicious']
def get_result(self):
def query_api(self, attribute: dict) -> None:
self.attribute.from_dict(**attribute)
self.input_types_mapping[self.attribute.type](self.attribute.value)
def get_result(self) -> dict:
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 add_vt_report(self, report: vt.Object) -> str:
analysis = report.get('last_analysis_stats')
total = self.get_total_analysis(analysis, report.get('known_distributors'))
permalink = f'https://www.virustotal.com/gui/{report.type}/{report.id}'
vt_object = MISPObject('virustotal-report')
vt_object.add_attribute('permalink', type='link', value=permalink)
detection_ratio = f"{analysis['malicious']}/{total}" if analysis else '-/-'
vt_object.add_attribute('detection-ratio', type='text', value=detection_ratio, disable_correlation=True)
self.misp_event.add_object(**vt_object)
return vt_object.uuid
def create_misp_object(self, report: vt.Object) -> MISPObject:
misp_object = None
vt_uuid = self.add_vt_report(report)
if report.type == 'file':
misp_object = MISPObject('file')
for hash_type in ('md5', 'sha1', 'sha256'):
misp_object.add_attribute(**{'type': hash_type,
'object_relation': hash_type,
'value': report.get(hash_type)})
elif report.type == 'domain':
misp_object = MISPObject('domain-ip')
misp_object.add_attribute('domain', type='domain', value=report.id)
elif report.type == 'ip_address':
misp_object = MISPObject('domain-ip')
misp_object.add_attribute('ip', type='ip-dst', value=report.id)
elif report.type == 'url':
misp_object = MISPObject('url')
misp_object.add_attribute('url', type='url', value=report.url)
misp_object.add_reference(vt_uuid, 'analyzed-with')
return misp_object
################################################################################
#### Main parsing functions #### # noqa
################################################################################
def parse_domain(self, domain, recurse=False):
req = requests.get(self.base_url.format('domain'), params={'apikey': self.apikey, 'domain': domain}, proxies=self.proxies)
if req.status_code != 200:
return req.status_code
req = req.json()
hash_type = 'sha256'
whois = 'whois'
feature_types = {'communicating': 'communicates-with',
'downloaded': 'downloaded-from',
'referrer': 'referring'}
siblings = (self.parse_siblings(domain) for domain in req['domain_siblings'])
uuid = self.parse_resolutions(req['resolutions'], req['subdomains'] if 'subdomains' in req else None, siblings)
for feature_type, relationship in feature_types.items():
for feature in ('undetected_{}_samples', 'detected_{}_samples'):
for sample in req.get(feature.format(feature_type), [])[:self.limit]:
status_code = self.parse_hash(sample[hash_type], False, uuid, relationship)
if status_code != 200:
return status_code
if req.get(whois):
whois_object = MISPObject(whois)
whois_object.add_attribute('text', type='text', value=req[whois])
def parse_domain(self, domain: str) -> str:
domain_report = self.client.get_object(f'/domains/{domain}')
# DOMAIN
domain_object = self.create_misp_object(domain_report)
# WHOIS
if domain_report.whois:
whois_object = MISPObject('whois')
whois_object.add_attribute('text', type='text', value=domain_report.whois)
self.misp_event.add_object(**whois_object)
return self.parse_related_urls(req, recurse, uuid)
def parse_hash(self, sample, recurse=False, uuid=None, relationship=None):
req = requests.get(self.base_url.format('file'), params={'apikey': self.apikey, 'resource': sample}, proxies=self.proxies)
status_code = req.status_code
if req.status_code == 200:
req = req.json()
vt_uuid = self.parse_vt_object(req)
file_attributes = []
for hash_type in ('md5', 'sha1', 'sha256'):
if req.get(hash_type):
file_attributes.append({'type': hash_type, 'object_relation': hash_type,
'value': req[hash_type]})
if file_attributes:
file_object = MISPObject('file')
for attribute in file_attributes:
file_object.add_attribute(**attribute)
file_object.add_reference(vt_uuid, 'analyzed-with')
if uuid and relationship:
file_object.add_reference(uuid, relationship)
# SIBLINGS AND SUBDOMAINS
for relationship_name, misp_name in [('siblings', 'sibling-of'), ('subdomains', 'subdomain')]:
rel_iterator = self.client.iterator(f'/domains/{domain_report.id}/{relationship_name}', limit=self.limit)
for item in rel_iterator:
attr = MISPAttribute()
attr.from_dict(**dict(type='domain', value=item.id))
self.misp_event.add_attribute(**attr)
domain_object.add_reference(attr.uuid, misp_name)
# RESOLUTIONS
resolutions_iterator = self.client.iterator(f'/domains/{domain_report.id}/resolutions', limit=self.limit)
for resolution in resolutions_iterator:
domain_object.add_attribute('ip', type='ip-dst', value=resolution.ip_address)
# COMMUNICATING, DOWNLOADED AND REFERRER FILES
for relationship_name, misp_name in [
('communicating_files', 'communicates-with'),
('downloaded_files', 'downloaded-from'),
('referrer_files', 'referring')
]:
files_iterator = self.client.iterator(f'/domains/{domain_report.id}/{relationship_name}', limit=self.limit)
for file in files_iterator:
file_object = self.create_misp_object(file)
file_object.add_reference(domain_object.uuid, misp_name)
self.misp_event.add_object(**file_object)
return status_code
def parse_ip(self, ip, recurse=False):
req = requests.get(self.base_url.format('ip-address'), params={'apikey': self.apikey, 'ip': ip}, proxies=self.proxies)
if req.status_code != 200:
return req.status_code
req = req.json()
if req.get('asn'):
asn_mapping = {'network': ('ip-src', 'subnet-announced'),
'country': ('text', 'country')}
asn_object = MISPObject('asn')
asn_object.add_attribute('asn', type='AS', value=req['asn'])
for key, value in asn_mapping.items():
if req.get(key):
attribute_type, relation = value
asn_object.add_attribute(relation, type=attribute_type, value=req[key])
self.misp_event.add_object(**asn_object)
uuid = self.parse_resolutions(req['resolutions']) if req.get('resolutions') else None
return self.parse_related_urls(req, recurse, uuid)
def parse_url(self, url, recurse=False, uuid=None):
req = requests.get(self.base_url.format('url'), params={'apikey': self.apikey, 'resource': url}, proxies=self.proxies)
status_code = req.status_code
if req.status_code == 200:
req = req.json()
vt_uuid = self.parse_vt_object(req)
if not recurse:
feature = 'url'
url_object = MISPObject(feature)
url_object.add_attribute(feature, type=feature, value=url)
url_object.add_reference(vt_uuid, 'analyzed-with')
if uuid:
url_object.add_reference(uuid, 'hosted-in')
# URLS
urls_iterator = self.client.iterator(f'/domains/{domain_report.id}/urls', limit=self.limit)
for url in urls_iterator:
url_object = self.create_misp_object(url)
url_object.add_reference(domain_object.uuid, 'hosted-in')
self.misp_event.add_object(**url_object)
return status_code
################################################################################
#### Additional parsing functions #### # noqa
################################################################################
self.misp_event.add_object(**domain_object)
return domain_object.uuid
def parse_related_urls(self, query_result, recurse, uuid=None):
if recurse:
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]
status_code = self.parse_url(value, False, uuid)
if status_code != 200:
return status_code
else:
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)
return 200
def parse_hash(self, file_hash: str) -> str:
file_report = self.client.get_object(f'files/{file_hash}')
file_object = self.create_misp_object(file_report)
self.misp_event.add_object(**file_object)
return file_object.uuid
def parse_resolutions(self, resolutions, subdomains=None, uuids=None):
domain_ip_object = MISPObject('domain-ip')
if self.attribute.type in ('domain', 'hostname'):
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)
return domain_ip_object.uuid
def parse_ip(self, ip: str) -> str:
ip_report = self.client.get_object(f'/ip_addresses/{ip}')
def parse_siblings(self, domain):
attribute = MISPAttribute()
attribute.from_dict(**dict(type='domain', value=domain))
self.misp_event.add_attribute(**attribute)
return attribute.uuid
# IP
ip_object = self.create_misp_object(ip_report)
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, disable_correlation=True)
self.misp_event.add_object(**vt_object)
return vt_object.uuid
# ASN
asn_object = MISPObject('asn')
asn_object.add_attribute('asn', type='AS', value=ip_report.asn)
asn_object.add_attribute('subnet-announced', type='ip-src', value=ip_report.network)
asn_object.add_attribute('country', type='text', value=ip_report.country)
self.misp_event.add_object(**asn_object)
def set_proxy_settings(self, config: dict) -> dict:
# RESOLUTIONS
resolutions_iterator = self.client.iterator(f'/ip_addresses/{ip_report.id}/resolutions', limit=self.limit)
for resolution in resolutions_iterator:
ip_object.add_attribute('domain', type='domain', value=resolution.host_name)
# URLS
urls_iterator = self.client.iterator(f'/ip_addresses/{ip_report.id}/urls', limit=self.limit)
for url in urls_iterator:
url_object = self.create_misp_object(url)
url_object.add_reference(ip_object.uuid, 'hosted-in')
self.misp_event.add_object(**url_object)
self.misp_event.add_object(**ip_object)
return ip_object.uuid
def parse_url(self, url: str) -> str:
url_id = vt.url_id(url)
url_report = self.client.get_object(f'/urls/{url_id}')
url_object = self.create_misp_object(url_report)
self.misp_event.add_object(**url_object)
return url_object.uuid
def get_proxy_settings(config: dict) -> dict:
"""Returns proxy settings in the requests format.
If no proxy settings are set, return None."""
proxies = None
@ -215,11 +210,10 @@ class VirusTotalParser(object):
'http': f'{scheme}://{host}',
'https': f'{scheme}://{host}'
}
self.proxies = proxies
return True
return proxies
def parse_error(status_code):
def parse_error(status_code: int) -> str:
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.'}
@ -233,7 +227,7 @@ def handler(q=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."
misperrors['error'] = 'A VirusTotal api key is required for this module.'
return misperrors
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.'}
@ -241,15 +235,21 @@ def handler(q=False):
return {'error': 'Unsupported attribute type.'}
event_limit = request['config'].get('event_limit')
if not isinstance(event_limit, int):
event_limit = 5
parser = VirusTotalParser(request['config']['apikey'], event_limit)
parser.set_proxy_settings(request.get('config'))
attribute = request['attribute']
status = parser.query_api(attribute)
if status != 200:
misperrors['error'] = parse_error(status)
proxy_settings = get_proxy_settings(request.get('config'))
try:
client = vt.Client(request['config']['apikey'],
headers={
'x-tool': 'MISPModuleVirusTotalExpansion',
},
proxy=proxy_settings['http'] if proxy_settings else None)
parser = VirusTotalParser(client, int(event_limit) if event_limit else None)
parser.query_api(attribute)
except vt.APIError as ex:
misperrors['error'] = ex.message
return misperrors
return parser.get_result()

315
misp_modules/modules/expansion/virustotal_public.py
View File

@ -1,6 +1,6 @@
import json
import logging
import requests
import vt
from . import check_input_attribute, standard_error_message
from urllib.parse import urlparse
from pymisp import MISPAttribute, MISPEvent, MISPObject
@ -8,8 +8,8 @@ from pymisp import MISPAttribute, MISPEvent, MISPObject
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.',
moduleinfo = {'version': '2', 'author': 'Christian Studer',
'description': 'Enrich observables with the VirusTotal v3 public API',
'module-type': ['expansion', 'hover']}
moduleconfig = ['apikey', 'proxy_host', 'proxy_port', 'proxy_username', 'proxy_password']
@ -18,63 +18,151 @@ LOGGER = logging.getLogger('virus_total_public')
LOGGER.setLevel(logging.INFO)
class VirusTotalParser():
def __init__(self):
super(VirusTotalParser, self).__init__()
DEFAULT_RESULTS_LIMIT = 10
class VirusTotalParser:
def __init__(self, client: vt.Client, limit: int) -> None:
self.client = client
self.limit = limit or DEFAULT_RESULTS_LIMIT
self.misp_event = MISPEvent()
self.attribute = MISPAttribute()
self.parsed_objects = {}
self.input_types_mapping = {'ip-src': self.parse_ip, 'ip-dst': self.parse_ip,
'domain': self.parse_domain, 'hostname': self.parse_domain,
'md5': self.parse_hash, 'sha1': self.parse_hash,
'sha256': self.parse_hash, 'url': self.parse_url}
self.proxies = None
def declare_variables(self, apikey, attribute):
self.attribute = MISPAttribute()
self.attribute.from_dict(**attribute)
self.apikey = apikey
@staticmethod
def get_total_analysis(analysis: dict, known_distributors: dict = None) -> int:
if not analysis:
return 0
count = sum([analysis['undetected'], analysis['suspicious'], analysis['harmless']])
return count if known_distributors else count + analysis['malicious']
def get_result(self):
def query_api(self, attribute: dict) -> None:
self.attribute.from_dict(**attribute)
self.input_types_mapping[self.attribute.type](self.attribute.value)
def get_result(self) -> dict:
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 add_vt_report(self, report: vt.Object) -> str:
analysis = report.get('last_analysis_stats')
total = self.get_total_analysis(analysis, report.get('known_distributors'))
permalink = f'https://www.virustotal.com/gui/{report.type}/{report.id}'
def parse_resolutions(self, resolutions, subdomains=None, uuids=None):
domain_ip_object = MISPObject('domain-ip')
if self.attribute.type in ('domain', 'hostname'):
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)
vt_object.add_attribute('permalink', type='link', value=permalink)
detection_ratio = f"{analysis['malicious']}/{total}" if analysis else '-/-'
vt_object.add_attribute('detection-ratio', type='text', value=detection_ratio, disable_correlation=True)
self.misp_event.add_object(**vt_object)
return vt_object.uuid
def get_query_result(self, query_type):
params = {query_type: self.attribute.value, 'apikey': self.apikey}
return requests.get(self.base_url, params=params, proxies=self.proxies)
def create_misp_object(self, report: vt.Object) -> MISPObject:
misp_object = None
vt_uuid = self.add_vt_report(report)
if report.type == 'file':
misp_object = MISPObject('file')
for hash_type in ('md5', 'sha1', 'sha256'):
misp_object.add_attribute(**{'type': hash_type,
'object_relation': hash_type,
'value': report.get(hash_type)})
elif report.type == 'domain':
misp_object = MISPObject('domain-ip')
misp_object.add_attribute('domain', type='domain', value=report.id)
elif report.type == 'ip_address':
misp_object = MISPObject('domain-ip')
misp_object.add_attribute('ip', type='ip-dst', value=report.id)
elif report.type == 'url':
misp_object = MISPObject('url')
misp_object.add_attribute('url', type='url', value=report.url)
misp_object.add_reference(vt_uuid, 'analyzed-with')
return misp_object
def set_proxy_settings(self, config: dict) -> dict:
################################################################################
#### Main parsing functions #### # noqa
################################################################################
def parse_domain(self, domain: str) -> str:
domain_report = self.client.get_object(f'/domains/{domain}')
# DOMAIN
domain_object = self.create_misp_object(domain_report)
# WHOIS
if domain_report.whois:
whois_object = MISPObject('whois')
whois_object.add_attribute('text', type='text', value=domain_report.whois)
self.misp_event.add_object(**whois_object)
# SIBLINGS AND SUBDOMAINS
for relationship_name, misp_name in [('siblings', 'sibling-of'), ('subdomains', 'subdomain')]:
rel_iterator = self.client.iterator(f'/domains/{domain_report.id}/{relationship_name}', limit=self.limit)
for item in rel_iterator:
attr = MISPAttribute()
attr.from_dict(**dict(type='domain', value=item.id))
self.misp_event.add_attribute(**attr)
domain_object.add_reference(attr.uuid, misp_name)
# RESOLUTIONS
resolutions_iterator = self.client.iterator(f'/domains/{domain_report.id}/resolutions', limit=self.limit)
for resolution in resolutions_iterator:
domain_object.add_attribute('ip', type='ip-dst', value=resolution.ip_address)
# COMMUNICATING AND REFERRER FILES
for relationship_name, misp_name in [
('communicating_files', 'communicates-with'),
('referrer_files', 'referring')
]:
files_iterator = self.client.iterator(f'/domains/{domain_report.id}/{relationship_name}', limit=self.limit)
for file in files_iterator:
file_object = self.create_misp_object(file)
file_object.add_reference(domain_object.uuid, misp_name)
self.misp_event.add_object(**file_object)
self.misp_event.add_object(**domain_object)
return domain_object.uuid
def parse_hash(self, file_hash: str) -> str:
file_report = self.client.get_object(f'files/{file_hash}')
file_object = self.create_misp_object(file_report)
self.misp_event.add_object(**file_object)
return file_object.uuid
def parse_ip(self, ip: str) -> str:
ip_report = self.client.get_object(f'/ip_addresses/{ip}')
# IP
ip_object = self.create_misp_object(ip_report)
# ASN
asn_object = MISPObject('asn')
asn_object.add_attribute('asn', type='AS', value=ip_report.asn)
asn_object.add_attribute('subnet-announced', type='ip-src', value=ip_report.network)
asn_object.add_attribute('country', type='text', value=ip_report.country)
self.misp_event.add_object(**asn_object)
# RESOLUTIONS
resolutions_iterator = self.client.iterator(f'/ip_addresses/{ip_report.id}/resolutions', limit=self.limit)
for resolution in resolutions_iterator:
ip_object.add_attribute('domain', type='domain', value=resolution.host_name)
self.misp_event.add_object(**ip_object)
return ip_object.uuid
def parse_url(self, url: str) -> str:
url_id = vt.url_id(url)
url_report = self.client.get_object(f'/urls/{url_id}')
url_object = self.create_misp_object(url_report)
self.misp_event.add_object(**url_object)
return url_object.uuid
def get_proxy_settings(config: dict) -> dict:
"""Returns proxy settings in the requests format.
If no proxy settings are set, return None."""
proxies = None
@ -85,8 +173,8 @@ class VirusTotalParser():
if host:
if not port:
misperrors['error'] = 'The virustotal_public_proxy_host config is set, ' \
'please also set the virustotal_public_proxy_port.'
misperrors['error'] = 'The virustotal_proxy_host config is set, ' \
'please also set the virustotal_proxy_port.'
raise KeyError
parsed = urlparse(host)
if 'http' in parsed.scheme:
@ -98,8 +186,8 @@ class VirusTotalParser():
if username:
if not password:
misperrors['error'] = 'The virustotal_public_proxy_username config is set, ' \
'please also set the virustotal_public_proxy_password.'
misperrors['error'] = 'The virustotal_proxy_username config is set, ' \
'please also set the virustotal_proxy_password.'
raise KeyError
auth = f'{username}:{password}'
host = auth + '@' + host
@ -108,101 +196,10 @@ class VirusTotalParser():
'http': f'{scheme}://{host}',
'https': f'{scheme}://{host}'
}
self.proxies = proxies
return True
return proxies
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):
def parse_error(status_code: int) -> str:
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.'}
@ -216,23 +213,29 @@ def handler(q=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."
misperrors['error'] = 'A VirusTotal api key is required for this module.'
return misperrors
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.'}
attribute = request['attribute']
if attribute['type'] not in mispattributes['input']:
if request['attribute']['type'] not in mispattributes['input']:
return {'error': 'Unsupported attribute type.'}
query_type, to_call = misp_type_mapping[attribute['type']]
parser = to_call(request['config']['apikey'], attribute)
parser.set_proxy_settings(request.get('config'))
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)
event_limit = request['config'].get('event_limit')
attribute = request['attribute']
proxy_settings = get_proxy_settings(request.get('config'))
try:
client = vt.Client(request['config']['apikey'],
headers={
'x-tool': 'MISPModuleVirusTotalPublicExpansion',
},
proxy=proxy_settings['http'] if proxy_settings else None)
parser = VirusTotalParser(client, int(event_limit) if event_limit else None)
parser.query_api(attribute)
except vt.APIError as ex:
misperrors['error'] = ex.message
return misperrors
return parser.get_result()