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170 lines (156 sloc) 6.92 KB
import json
import requests
from requests import HTTPError
import base64
from collections import defaultdict
misperrors = {'error': 'Error'}
mispattributes = {'input': ['hostname', 'domain', "ip-src", "ip-dst", "md5", "sha1", "sha256", "sha512"],
'output': ['domain', "ip-src", "ip-dst", "text", "md5", "sha1", "sha256", "sha512", "ssdeep",
"authentihash", "filename"]}
# possible module-types: 'expansion', 'hover' or both
moduleinfo = {'version': '3', 'author': 'Hannah Ward',
'description': 'Get information from virustotal',
'module-type': ['expansion']}
# config fields that your code expects from the site admin
moduleconfig = ["apikey", "event_limit"]
comment = '{}: Enriched via VirusTotal'
hash_types = ["md5", "sha1", "sha256", "sha512"]
class VirusTotalRequest(object):
def __init__(self, config):
self.apikey = config['apikey']
self.limit = int(config.get('event_limit', 5))
self.base_url = "https://www.virustotal.com/vtapi/v2/{}/report"
self.results = defaultdict(set)
self.to_return = []
self.input_types_mapping = {'ip-src': self.get_ip, 'ip-dst': self.get_ip,
'domain': self.get_domain, 'hostname': self.get_domain,
'md5': self.get_hash, 'sha1': self.get_hash,
'sha256': self.get_hash, 'sha512': self.get_hash}
self.output_types_mapping = {'submission_names': 'filename', 'ssdeep': 'ssdeep',
'authentihash': 'authentihash', 'ITW_urls': 'url'}
def parse_request(self, q):
req_values = set()
for attribute_type, attribute_value in q.items():
req_values.add(attribute_value)
try:
error = self.input_types_mapping[attribute_type](attribute_value)
except KeyError:
continue
if error is not None:
return error
for key, values in self.results.items():
values = values.difference(req_values)
if values:
if isinstance(key, tuple):
types, comment = key
self.to_return.append({'types': list(types), 'values': list(values), 'comment': comment})
else:
self.to_return.append({'types': key, 'values': list(values)})
return self.to_return
def get_domain(self, domain, do_not_recurse=False):
req = requests.get(self.base_url.format('domain'), params={'domain': domain, 'apikey': self.apikey})
try:
req.raise_for_status()
req = req.json()
except HTTPError as e:
return str(e)
if req["response_code"] == 0:
# Nothing found
return []
if "resolutions" in req:
for res in req["resolutions"][:self.limit]:
ip_address = res["ip_address"]
self.results[(("ip-dst", "ip-src"), comment.format(domain))].add(ip_address)
# Pivot from here to find all domain info
if not do_not_recurse:
error = self.get_ip(ip_address, True)
if error is not None:
return error
self.get_more_info(req)
def get_hash(self, _hash):
req = requests.get(self.base_url.format('file'), params={'resource': _hash, 'apikey': self.apikey, 'allinfo': 1})
try:
req.raise_for_status()
req = req.json()
except HTTPError as e:
return str(e)
if req["response_code"] == 0:
# Nothing found
return []
self.get_more_info(req)
def get_ip(self, ip, do_not_recurse=False):
req = requests.get(self.base_url.format('ip-address'), params={'ip': ip, 'apikey': self.apikey})
try:
req.raise_for_status()
req = req.json()
except HTTPError as e:
return str(e)
if req["response_code"] == 0:
# Nothing found
return []
if "resolutions" in req:
for res in req["resolutions"][:self.limit]:
hostname = res["hostname"]
self.results[(("domain",), comment.format(ip))].add(hostname)
# Pivot from here to find all domain info
if not do_not_recurse:
error = self.get_domain(hostname, True)
if error is not None:
return error
self.get_more_info(req)
def find_all(self, data):
hashes = []
if isinstance(data, dict):
for key, value in data.items():
if key in hash_types:
self.results[key].add(value)
hashes.append(value)
else:
if isinstance(value, (dict, list)):
hashes.extend(self.find_all(value))
elif isinstance(data, list):
for d in data:
hashes.extend(self.find_all(d))
return hashes
def get_more_info(self, req):
# Get all hashes first
hashes = self.find_all(req)
for h in hashes[:self.limit]:
# Search VT for some juicy info
try:
data = requests.get(self.base_url.format('file'), params={'resource': h, 'apikey': self.apikey, 'allinfo': 1}).json()
except Exception:
continue
# Go through euch key and check if it exists
for VT_type, MISP_type in self.output_types_mapping.items():
if VT_type in data:
try:
self.results[((MISP_type,), comment.format(h))].add(data[VT_type])
except TypeError:
self.results[((MISP_type,), comment.format(h))].update(data[VT_type])
# Get the malware sample
sample = requests.get(self.base_url[:-6].format('file/download'), params={'hash': h, 'apikey': self.apikey})
malsample = sample.content
# It is possible for VT to not give us any submission names
if "submission_names" in data:
self.to_return.append({"types": ["malware-sample"], "categories": ["Payload delivery"],
"values": data["submimssion_names"], "data": str(base64.b64encore(malsample), 'utf-8')})
def handler(q=False):
if q is False:
return False
q = json.loads(q)
if not q.get('config') or not q['config'].get('apikey'):
misperrors['error'] = "A VirusTotal api key is required for this module."
return misperrors
del q['module']
query = VirusTotalRequest(q.pop('config'))
r = query.parse_request(q)
if isinstance(r, str):
misperrors['error'] = r
return misperrors
return {'results': r}
def introspection():
return mispattributes
def version():
moduleinfo['config'] = moduleconfig
return moduleinfo