misp-modules/misp_modules/modules/expansion/onyphe.py

# -*- coding: utf-8 -*-

import json

from pymisp import MISPEvent, MISPObject

try:
    from onyphe import Onyphe
except ImportError:
    print("pyonyphe module not installed.")

misperrors = {'error': 'Error'}

mispattributes = {'input': ['ip-src', 'ip-dst', 'hostname', 'domain'],
                  'output': ['hostname', 'domain', 'ip-src', 'ip-dst', 'url'],
                  'format': 'misp_standard'}
# possible module-types: 'expansion', 'hover' or both
moduleinfo = {'version': '2', 'author': 'Sebastien Larinier @sebdraven',
              'description': 'Query on Onyphe',
              'module-type': ['expansion', 'hover']}

# config fields that your code expects from the site admin
moduleconfig = ['apikey']


class OnypheClient:

    def __init__(self, api_key, attribute):
        self.onyphe_client = Onyphe(api_key=api_key)
        self.attribute = attribute
        self.misp_event = MISPEvent()
        self.misp_event.add_attribute(**attribute)

    def get_results(self):
        event = json.loads(self.misp_event.to_json())
        results = {key: event[key]
                   for key in ('Attribute', 'Object') if key in event}
        return results

    def get_query_onyphe(self):
        if self.attribute['type'] == 'ip-src' or self.attribute['type'] == 'ip-dst':
            self.__summary_ip()
        if self.attribute['type'] == 'domain':
            self.__summary_domain()
        if self.attribute['type'] == 'hostname':
            self.__summary_hostname()

    def __summary_ip(self):
        results = self.onyphe_client.summary_ip(self.attribute['value'])
        if 'results' in results:
            for r in results['results']:
                if 'domain' in r:
                    domain = r['domain']
                    if type(domain) == list:
                        for d in domain:
                            self.__get_object_domain_ip(d, 'domain')
                    elif type(domain) == str:
                        self.__get_object_domain_ip(domain, 'domain')

                if 'hostname' in r:
                    hostname = r['hostname']
                    if type(hostname) == list:
                        for d in hostname:
                            self.__get_object_domain_ip(d, 'domain')
                    elif type(hostname) == str:
                        self.__get_object_domain_ip(hostname, 'domain')

                if 'issuer' in r:
                    self.__get_object_certificate(r)

    def __summary_domain(self):
        results = self.onyphe_client.summary_domain(self.attribute['value'])
        if 'results' in results:
            for r in results['results']:

                for domain in r.get('domain'):
                    self.misp_event.add_attribute('domain', domain)
                for hostname in r.get('hostname'):
                    self.misp_event.add_attribute('hostname', hostname)
                if 'ip' in r:
                    if type(r['ip']) is str:
                        self.__get_object_domain_ip(r['ip'], 'ip')
                    if type(r['ip']) is list:
                        for ip in r['ip']:
                            self.__get_object_domain_ip(ip, 'ip')
                if 'issuer' in r:
                    self.__get_object_certificate(r)

    def __summary_hostname(self):
        results = self.onyphe_client.summary_hostname(self.attribute['value'])
        if 'results' in results:

            for r in results['results']:
                if 'domain' in r:
                    if type(r['domain']) is str:
                        self.misp_event.add_attribute(
                            'domain', r['domain'])
                    if type(r['domain']) is list:
                        for domain in r['domain']:
                            self.misp_event.add_attribute('domain', domain)

                if 'hostname' in r:
                    if type(r['hostname']) is str:
                        self.misp_event.add_attribute(
                            'hostname', r['hostname'])
                    if type(r['hostname']) is list:
                        for hostname in r['hostname']:
                            self.misp_event.add_attribute(
                                'hostname', hostname)

                if 'ip' in r:
                    if type(r['ip']) is str:
                        self.__get_object_domain_ip(r['ip'], 'ip')
                    if type(r['ip']) is list:
                        for ip in r['ip']:
                            self.__get_object_domain_ip(ip, 'ip')

                if 'issuer' in r:
                    self.__get_object_certificate(r)

                if 'cve' in r:
                    if type(r['cve']) is list:
                        for cve in r['cve']:
                            self.__get_object_cve(r, cve)

    def __get_object_certificate(self, r):
        object_certificate = MISPObject('x509')
        object_certificate.add_attribute('ip', self.attribute['value'])
        object_certificate.add_attribute('serial-number', r['serial'])
        object_certificate.add_attribute(
            'x509-fingerprint-sha256', r['fingerprint']['sha256'])
        object_certificate.add_attribute(
            'x509-fingerprint-sha1', r['fingerprint']['sha1'])
        object_certificate.add_attribute(
            'x509-fingerprint-md5', r['fingerprint']['md5'])

        signature = r['signature']['algorithm']
        value = ''
        if 'sha256' in signature and 'RSA' in signature:
            value = 'SHA256_WITH_RSA_ENCRYPTION'
        elif 'sha1' in signature and 'RSA' in signature:
            value = 'SHA1_WITH_RSA_ENCRYPTION'
        if value:
            object_certificate.add_attribute('signature_algorithm', value)

        object_certificate.add_attribute(
            'pubkey-info-algorithm', r['publickey']['algorithm'])

        if 'exponent' in r['publickey']:
            object_certificate.add_attribute(
                'pubkey-info-exponent', r['publickey']['exponent'])
        if 'length' in r['publickey']:
            object_certificate.add_attribute(
                'pubkey-info-size', r['publickey']['length'])

        object_certificate.add_attribute('issuer', r['issuer']['commonname'])
        object_certificate.add_attribute(
            'validity-not-before', r['validity']['notbefore'])
        object_certificate.add_attribute(
            'validity-not-after', r['validity']['notbefore'])
        object_certificate.add_reference(self.attribute['uuid'], 'related-to')
        self.misp_event.add_object(object_certificate)

    def __get_object_domain_ip(self, obs, relation):
        objet_domain_ip = MISPObject('domain-ip')
        objet_domain_ip.add_attribute(relation, obs)
        relation_attr = self.__get_relation_attribute()
        if relation_attr:
            objet_domain_ip.add_attribute(
                relation_attr, self.attribute['value'])
            objet_domain_ip.add_reference(self.attribute['uuid'], 'related-to')
            self.misp_event.add_object(objet_domain_ip)

    def __get_relation_attribute(self):

        if self.attribute['type'] == 'ip-src':
            return 'ip'
        elif self.attribute['type'] == 'ip-dst':
            return 'ip'
        elif self.attribute['type'] == 'domain':
            return 'domain'
        elif self.attribute['type'] == 'hostname':
            return 'domain'

    def __get_object_cve(self, item, cve):
        attributes = []
        object_cve = MISPObject('vulnerability')
        object_cve.add_attribute('id', cve)
        object_cve.add_attribute('state', 'Published')

        if type(item['ip']) is list:
            for ip in item['ip']:
                attributes.extend(
                    list(filter(lambda x: x['value'] == ip, self.misp_event['Attribute'])))
                for obj in self.misp_event['Object']:
                    attributes.extend(
                        list(filter(lambda x: x['value'] == ip, obj['Attribute'])))
        if type(item['ip']) is str:

            for obj in self.misp_event['Object']:
                for att in obj['Attribute']:
                    if att['value'] == item['ip']:
                        object_cve.add_reference(obj['uuid'], 'cve')

        self.misp_event.add_object(object_cve)


def handler(q=False):
    if q:

        request = json.loads(q)
        attribute = request['attribute']

        if not request.get('config') or not request['config'].get('apikey'):
            misperrors['error'] = 'Onyphe authentication is missing'
            return misperrors

        api_key = request['config'].get('apikey')

        onyphe_client = OnypheClient(api_key, attribute)
        onyphe_client.get_query_onyphe()
        results = onyphe_client.get_results()

        return {'results': results}


def introspection():
    return mispattributes


def version():
    moduleinfo['config'] = moduleconfig
    return moduleinfo