diff --git a/misp_modules/modules/expansion/virustotal.py b/misp_modules/modules/expansion/virustotal.py
index 2c82787..7f18b54 100644
--- a/misp_modules/modules/expansion/virustotal.py
+++ b/misp_modules/modules/expansion/virustotal.py
@@ -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,
@@ -30,196 +33,187 @@ 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)
+        # 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)
 
-    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')
-                self.misp_event.add_object(**url_object)
-        return status_code
+        self.misp_event.add_object(**domain_object)
+        return domain_object.uuid
 
-    ################################################################################
-    ####                      Additional parsing functions                      #### # noqa
-    ################################################################################
+    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_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
+    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)
+
+        # 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
+    host = config.get('proxy_host')
+    port = config.get('proxy_port')
+    username = config.get('proxy_username')
+    password = config.get('proxy_password')
+
+    if host:
+        if not 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:
+            scheme = 'http'
         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
+            scheme = parsed.scheme
+        netloc = parsed.netloc
+        host = f'{netloc}:{port}'
 
-    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_siblings(self, domain):
-        attribute = MISPAttribute()
-        attribute.from_dict(**dict(type='domain', value=domain))
-        self.misp_event.add_attribute(**attribute)
-        return attribute.uuid
-
-    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
-
-    def set_proxy_settings(self, config: dict) -> dict:
-        """Returns proxy settings in the requests format.
-        If no proxy settings are set, return None."""
-        proxies = None
-        host = config.get('proxy_host')
-        port = config.get('proxy_port')
-        username = config.get('proxy_username')
-        password = config.get('proxy_password')
-
-        if host:
-            if not port:
-                misperrors['error'] = 'The virustotal_proxy_host config is set, ' \
-                                    'please also set the virustotal_proxy_port.'
+        if username:
+            if not password:
+                misperrors['error'] = 'The virustotal_proxy_username config is set, ' \
+                                      'please also set the virustotal_proxy_password.'
                 raise KeyError
-            parsed = urlparse(host)
-            if 'http' in parsed.scheme:
-                scheme = 'http'
-            else:
-                scheme = parsed.scheme
-            netloc = parsed.netloc
-            host = f'{netloc}:{port}'
+            auth = f'{username}:{password}'
+            host = auth + '@' + host
 
-            if username:
-                if not 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
-
-            proxies = {
-                'http': f'{scheme}://{host}',
-                'https': f'{scheme}://{host}'
-            }
-        self.proxies = proxies
-        return True
+        proxies = {
+            'http': f'{scheme}://{host}',
+            'https': f'{scheme}://{host}'
+        }
+    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()
 
 
@@ -259,4 +259,4 @@ def introspection():
 
 def version():
     moduleinfo['config'] = moduleconfig
-    return moduleinfo
+    return moduleinfo
\ No newline at end of file
diff --git a/misp_modules/modules/expansion/virustotal_public.py b/misp_modules/modules/expansion/virustotal_public.py
index c10f4d2..f72bda4 100644
--- a/misp_modules/modules/expansion/virustotal_public.py
+++ b/misp_modules/modules/expansion/virustotal_public.py
@@ -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']
@@ -18,191 +18,188 @@ 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)
+        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 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 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 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)
+    ################################################################################
+    ####                         Main parsing functions                         #### # noqa
+    ################################################################################
 
-    def set_proxy_settings(self, config: dict) -> dict:
-        """Returns proxy settings in the requests format.
-        If no proxy settings are set, return None."""
-        proxies = None
-        host = config.get('proxy_host')
-        port = config.get('proxy_port')
-        username = config.get('proxy_username')
-        password = config.get('proxy_password')
+    def parse_domain(self, domain: str) -> str:
+        domain_report = self.client.get_object(f'/domains/{domain}')
 
-        if host:
-            if not port:
-                misperrors['error'] = 'The virustotal_public_proxy_host config is set, ' \
-                                    'please also set the virustotal_public_proxy_port.'
-                raise KeyError
-            parsed = urlparse(host)
-            if 'http' in parsed.scheme:
-                scheme = 'http'
-            else:
-                scheme = parsed.scheme
-            netloc = parsed.netloc
-            host = f'{netloc}:{port}'
+        # DOMAIN
+        domain_object = self.create_misp_object(domain_report)
 
-            if username:
-                if not password:
-                    misperrors['error'] = 'The virustotal_public_proxy_username config is set, ' \
-                                        'please also set the virustotal_public_proxy_password.'
-                    raise KeyError
-                auth = f'{username}:{password}'
-                host = auth + '@' + host
-
-            proxies = {
-                'http': f'{scheme}://{host}',
-                'https': f'{scheme}://{host}'
-            }
-        self.proxies = proxies
-        return True
-
-
-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])
+        # 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)
-        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
+        # 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
 
 
-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 get_proxy_settings(config: dict) -> dict:
+    """Returns proxy settings in the requests format.
+    If no proxy settings are set, return None."""
+    proxies = None
+    host = config.get('proxy_host')
+    port = config.get('proxy_port')
+    username = config.get('proxy_username')
+    password = config.get('proxy_password')
 
-    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)
+    if host:
+        if not 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:
+            scheme = 'http'
+        else:
+            scheme = parsed.scheme
+        netloc = parsed.netloc
+        host = f'{netloc}:{port}'
+
+        if username:
+            if not 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
+
+        proxies = {
+            'http': f'{scheme}://{host}',
+            'https': f'{scheme}://{host}'
+        }
+    return proxies
 
 
-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()
 
 
@@ -242,4 +245,4 @@ def introspection():
 
 def version():
     moduleinfo['config'] = moduleconfig
-    return moduleinfo
+    return moduleinfo
\ No newline at end of file