def generate_MISP_Event(deduplicated_observations, conf, tags, attr_tags):
dt = datetime.now()
event = MISPEvent()
event.info = dt.strftime("%Y%m%d ") + 'TIE'
event.publish_timestamp = dt.strftime("%s")
event.timestamp = dt.strftime("%s")
event['timestamp'] = dt.strftime("%s")
event.analysis = 2
event.published = conf.event_published
orgc = MISPOrganisation()
orgc.from_json(json.dumps({'name': conf.org_name, 'uuid': conf.org_uuid}))
event.orgc = orgc
event.threat_level_id = conf.event_base_thread_level
event.date = dt
event['uuid'] = str(uuid.uuid1())
if len(tags) > 0:
event['Tag'] = tags
attr_hashes = []
for key, attr in deduplicated_observations.items():
misp_attr = MISPAttribute()
misp_attr.timestamp = dt.strftime("%s")
misp_attr['timestamp'] = dt.strftime("%s")
misp_attr.type = get_Attribute_Type(attr)
misp_attr.value = get_MISP_Fitted_Value(attr["value"], misp_attr.type)
if 'c2-server' in attr['categories'] and attr_tags.c2tags:
misp_attr['Tag'] = attr_tags.c2tags
if 'malware' in attr['categories'] and attr_tags.malwaretags:
misp_attr['Tag'] = attr_tags.malwaretags
if 'espionage' in attr['categories'] and attr_tags.espionagetags:
misp_attr['Tag'] = attr_tags.espionagetags
if 'bot' in attr['categories'] and attr_tags.bottags:
misp_attr['Tag'] = attr_tags.bottags
if 'whitelist' in attr['categories'] and attr_tags.whitelisttags:
misp_attr['Tag'] = attr_tags.whitelisttags
if 'cybercrime' in attr['categories'] and attr_tags.cybercrimetags:
misp_attr['Tag'] = attr_tags.cybercrimetags
if 'phishing' in attr['categories'] and attr_tags.phishingtags:
misp_attr['Tag'] = attr_tags.phishingtags
misp_attr.category = get_Attribute_Category(attr)
if conf.attr_to_ids and attr[
'min_confidence'] >= conf.attr_to_ids_threshold:
misp_attr.to_ids = True
else:
misp_attr.to_ids = False
misp_attr['comment'] = 'categories: ' + str(attr['categories']) + ' actors: ' + str(attr['actors']) + \
' families: ' + str(attr['families']) + ' sources: ' + str(attr['sources']) + \
' severity: ' + str(attr['max_severity']) + \
' confidence: ' + str(attr['max_confidence'])
misp_attr.edited = False
event.add_attribute(**(misp_attr.to_dict()))
attr_hashes.append([
hashlib.md5(attr['value'].encode("utf-8")).hexdigest(),
event['uuid']
])
event.edited = False
return event, attr_hashes
def propose(type, value, category):
attr_type = type
value = value
category = category
to_ids = False
# Attribute data already defined
attribute = MISPAttribute()
attribute.type = attr_type
attribute.value = value
attribute.category = category
attribute.to_ids = to_ids
event_id = EVENTid
proposal = misp.add_attribute_proposal(event_id, attribute)
print('Proposed!')
def ip_attribute(category, type, value):
attribute = MISPAttribute()
attribute.category = category
attribute.org = "RST Cloud"
attribute.type = type
if value['ip']:
if value['ip']['v4']:
attribute.value = value['ip']['v4']
attribute.add_tag("rstcloud:asn:firstip=" +
str(value['asn']['firstip']['netv4']))
attribute.add_tag("rstcloud:asn:lastip=" +
str(value['asn']['lastip']['netv4']))
else:
if value['ip']['v6']:
attribute.value = value['ip']['v6']
attribute.add_tag("rstcloud:asn:firstip=" +
str(value['asn']['firstip']['netv6']))
attribute.add_tag("rstcloud:asn:lastip=" +
str(value['asn']['lastip']['netv6']))
attribute.add_tag("rstcloud:asn:number=" + str(value['asn']['num']))
attribute.comment = listToString(value['src']['str'])
attribute.first_seen = value['fseen']
attribute.last_seen = value['lseen']
attribute.timestamp = value['collect']
attribute.distribution = distribution_level
attribute.add_tag("rstcloud:score:total=" + str(value['score']['total']))
for rsttag in value['tags']['str']:
attribute.add_tag("rstcloud:tag=" + str(rsttag))
if value['asn']['cloud']:
attribute.add_tag("rstcloud:cloudprovider=" +
str(value['asn']['cloud']))
if value['asn']['domains']:
attribute.add_tag("rstcloud:number_of_hosted_domains=" +
str(value['asn']['domains']))
attribute.add_tag("rstcloud:org=" + str(value['asn']['org']))
attribute.add_tag("rstcloud:isp=" + str(value['asn']['isp']))
attribute.add_tag("rstcloud:geo.city=" + str(value['geo']['city']))
attribute.add_tag("rstcloud:geo.region=" + str(value['geo']['region']))
attribute.add_tag("rstcloud:geo.country=" + str(value['geo']['country']))
attribute.add_tag("rstcloud:score:total=" + str(value['score']['total']))
attribute.add_tag("rstcloud:false-positive:alarm=" +
str(value['fp']['alarm']))
if value['fp']['descr']:
attribute.add_tag("rstcloud:false-positive:description=" +
str(value['fp']['descr']))
return attribute
def domain_attribute(category, type, value):
attribute = MISPAttribute()
attribute.category = category
attribute.type = type
attribute.value = value['domain']
attribute.comment = listToString(value['src']['str'])
attribute.first_seen = value['fseen']
attribute.last_seen = value['lseen']
attribute.timestamp = value['collect']
attribute.distribution = distribution_level
attribute.add_tag("rstcloud:score:total=" + str(value['score']['total']))
for rsttag in value['tags']['str']:
attribute.add_tag("rstcloud:tag=" + str(rsttag))
if value['resolved'] and value['resolved']['whois']:
if value['resolved']['whois']['age'] > 0:
attribute.add_tag("rstcloud:whois:created=" +
str(value['resolved']['whois']['created']))
attribute.add_tag("rstcloud:whois:updated=" +
str(value['resolved']['whois']['updated']))
attribute.add_tag("rstcloud:whois:expires=" +
str(value['resolved']['whois']['expires']))
attribute.add_tag("rstcloud:whois:age=" +
str(value['resolved']['whois']['age']))
if value['resolved']['whois']['registrar'] and value['resolved'][
'whois']['registrar'] != 'unknown':
attribute.add_tag("rstcloud:whois:registrar=" +
str(value['resolved']['whois']['registrar']))
if value['resolved']['whois']['registrar'] and value['resolved'][
'whois']['registrant'] != 'unknown':
attribute.add_tag("rstcloud:whois:registrant=" +
str(value['resolved']['whois']['registrant']))
attribute.add_tag("rstcloud:score:total=" + str(value['score']['total']))
attribute.add_tag("rstcloud:false-positive:alarm=" +
str(value['fp']['alarm']))
if value['fp']['descr']:
attribute.add_tag("rstcloud:false-positive:description=" +
str(value['fp']['descr']))
return attribute
def search_vmray_incomplete(
m, url, wait_period, module_import_url, module_import_port, vmray_url,
vmray_api, vmray_attribute_category, vmray_include_analysisid,
vmray_include_imphash_ssdeep, vmray_include_extracted_files,
vmray_include_analysisdetails, vmray_include_vtidetails,
custom_tags_incomplete, custom_tags_complete):
controller = 'attributes'
vmray_value = 'VMRay Sample ID:' # How sample IDs are stored in MISP
req = None
# Search for the events
try:
result = m.search(controller, tags=custom_tags_incomplete)
attribute = result['Attribute']
if len(attribute) == 0:
sys.exit("No VMRay attributes found that match %s" %
custom_tags_incomplete)
timestamp = int(attribute[0]["timestamp"])
# Not enough time has gone by to lookup the analysis jobs
if int((time.time() - timestamp) / 60) < int(wait_period):
if module_DEBUG:
r_timestamp = datetime.datetime.fromtimestamp(
timestamp).strftime('%Y-%m-%d %H:%M:%S')
print(
"Attribute to recent for wait_period (%s minutes) - timestamp attribute: %s (%s minutes old)"
% (wait_period, r_timestamp,
round((int(time.time() - timestamp) / 60), 2)))
return False
if module_DEBUG:
print("All attributes older than %s" % int(wait_period))
for att in attribute:
value = att['value']
if vmray_value in value: # We found a sample ID
att_id = att['id']
att_uuid = att['uuid']
# VMRay Sample IDs are stored as VMRay Sample ID: 2796577
vmray_sample_id = value.split(vmray_value)[1].strip()
if vmray_sample_id.isdigit():
event_id = att['event_id']
if module_DEBUG:
print(
"Found event %s with matching tags %s for sample id %s "
% (event_id, custom_tags_incomplete,
vmray_sample_id))
# Prepare request to send to vmray_import via misp modules
misp_modules_url = module_import_url + ':' + module_import_port + '/query'
misp_modules_headers = {'Content-Type': 'application/json'}
misp_modules_body = '{ "sample_id":"' + vmray_sample_id + '","module":"vmray_import","event_id":"' + event_id + '","config":{"apikey":"' + vmray_api + '","url":"' + vmray_url + '","include_analysisid":"' + vmray_include_analysisid + '","include_analysisdetails":"' + vmray_include_analysisdetails + '","include_extracted_files":"' + vmray_include_extracted_files + '","include_imphash_ssdeep":"' + vmray_include_imphash_ssdeep + '","include_vtidetails":"' + vmray_include_vtidetails + '","sample_id":"' + vmray_sample_id + '"},"data":""}'
req = requests.post(misp_modules_url,
data=misp_modules_body,
headers=misp_modules_headers)
if module_DEBUG and req is not None:
print(
"Response code from submitting to MISP modules %s"
% (req.status_code))
# Succesful response from the misp modules?
if req.status_code == 200:
req_json = req.json()
if "error" in req_json:
print("Error code in reply %s " %
req_json["error"])
continue
else:
results = req_json["results"]
# Walk through all results in the misp-module reply
for el in results:
to_ids = True
values = el['values']
types = el['types']
if "to_ids" in el:
to_ids = el['to_ids']
if "text" in types:
to_ids = False
comment = el['comment']
if len(comment) < 1:
comment = "Enriched via the vmray_import module"
# Attribute can belong in different types
for attr_type in types:
try:
new_attribute = MISPAttribute()
new_attribute.type = attr_type
new_attribute.category = vmray_attribute_category
new_attribute.value = values
new_attribute.to_ids = to_ids
new_attribute.comment = comment
r = m.add_attribute(
event_id, new_attribute)
if module_DEBUG:
print(
"Add event %s: %s as %s (%s) (toids: %s)"
% (event_id, values, attr_type,
comment, to_ids))
except Exception as e:
if module_DEBUG:
print(
"Unable to add attribute %s as type %s for event %s"
%
(values, attr_type, event_id))
continue
# Remove 'incomplete' state tags
m.untag(att_uuid, custom_tags_incomplete)
# Update tags to 'complete' state
m.tag(att_uuid, custom_tags_complete)
if module_DEBUG:
print("Updated event %s" % event_id)
else:
sys.exit(
'MISP modules did not return HTTP 200 code (event %s ; sampleid %s)'
% (event_id, vmray_sample_id))
except Exception as e:
sys.exit("Invalid response received from MISP : %s", e)
def poll_taxii():
global f_hashes, f_manifest, f_events
results_dict = {}
client = create_client(
CYBERSAIYAN_FEED_URL,
use_https=TAXII_USE_TLS,
discovery_path=TAXII_DISCOVERY_PATH
)
blocks = client.poll(collection_name=CYBERSAIYAN_COLLECTION_NAME)
for block in blocks:
content = block.content
if content:
if type(content) == str:
continue
elif type(content) == bytes:
content = content.decode('utf-8')
pkg = STIXPackage.from_xml(StringIO(content))
title = pkg.stix_header.title
information_source = pkg.stix_header.information_source.identity.name
cs_event = (title, information_source)
cs_event_hash = hash(cs_event)
db_cursor.execute("SELECT uuid FROM hashes WHERE hash = '%s'" % cs_event_hash)
element = db_cursor.fetchone()
if element:
e_uuid = element[0]
else:
e_uuid = str(uuid.uuid4())
db_cursor.execute("INSERT INTO hashes VALUES (?,?)", (cs_event_hash,e_uuid,))
if cs_event_hash not in results_dict:
results_dict[cs_event_hash] = MISPEvent()
m_ev = results_dict[cs_event_hash]
m_ev.info = str(pkg.stix_header.description)
m_ev.analysis = 0
m_ev.uuid = e_uuid
#m_ev.org = "CyberSaiyan"
csorg = MISPOrganisation()
csorg.name = "CyberSaiyan"
csorg.uuid = "8aaa81ed-72ef-4fb1-8e96-fa1bc200faeb"
m_ev.orgc = csorg
marking = pkg.stix_header.handling.marking
tlp = 0
found_tlp = False
for m in marking:
for struct in m.marking_structures:
if struct._XSI_TYPE == "tlpMarking:TLPMarkingStructureType":
found_tlp = True
tlp = max(TLP[struct.color.lower()], tlp)
if tlp == 0 and not found_tlp:
tlp = TLP["amber"]
m_ev.add_tag("tlp:"+TLP[tlp])
m_ev.add_tag("CyberSaiyan")
indicators = pkg.indicators
last_ts = utc.localize(datetime.datetime(1970,1,1))
for indicator in indicators:
cur_ts = indicator.timestamp
if cur_ts > last_ts:
last_ts = cur_ts
obj = indicator.observable.object_
obj_d = obj.properties.to_dict()
attr_type = obj_d["xsi:type"]
if attr_type == "AddressObjectType":
attr = MISPAttribute()
attr.category = "Network activity"
attr.type = "ip-dst"
attr.value = obj_d["address_value"]
attr.disable_correlation = False
attr.to_ids = True
elif attr_type == "DomainNameObjectType":
attr = MISPAttribute()
attr.category = "Network activity"
attr.type = "domain"
attr.value = obj_d["value"]
attr.disable_correlation = False
attr.to_ids = True
elif attr_type == "URIObjectType":
attr = MISPAttribute()
attr.category = "Network activity"
attr.type = "url"
attr.value = obj_d["value"]
attr.disable_correlation = False
attr.to_ids = True
elif attr_type == "FileObjectType":
hash_type = obj_d["hashes"][0]["type"]["value"].lower()
hash_value = obj_d["hashes"][0]["simple_hash_value"]
attr = MISPAttribute()
attr.category = "Payload delivery"
assert hash_type in ('md5', "sha1", "sha224",
"sha256", "sha384", "sha512", "ssdeep")
attr.type = hash_type
attr.value = hash_value
attr.disable_correlation = False
attr.to_ids = True
m_ev.date = last_ts.strftime("%Y-%m-%d")
m_ev.attributes.append(attr)
db_conn.commit()
c_hashes, c_manifest, c_events = list(), dict(), dict()
for event in results_dict.values():
e_feed = event.to_feed(with_meta=True).get("Event")
c_hashes += [[h, event.uuid] for h in e_feed.pop("_hashes")]
c_manifest.update(e_feed.pop('_manifest'))
c_events[event.uuid] = e_feed
f_hashes, f_manifest, f_events = c_hashes, c_manifest, c_events
def create_attributes(misp_api, event_id, site):
"""
Create MISP IOCs attributes.
:param misp_api: MISP Object API.
:param event_id: MISP Event ID.
:param site: Site Object.
:return:
"""
print(
str(timezone.now()) + " - " + 'Create MISP IOCs attributes for: ',
event_id)
print('-----------------------------')
tag = None
tags = misp_api.tags(pythonify=True)
for t in tags:
if t.name == 'Watcher':
tag = t
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "domain"
attribute.distribution = 5
attribute.comment = "Domain name monitored"
attribute.tags = [tag]
attribute.value = site.domain_name
misp_api.add_attribute(event=event_id, attribute=attribute)
if settings.MISP_TICKETING_URL != '':
attribute = MISPAttribute()
attribute.category = "Internal reference"
attribute.type = "link"
attribute.distribution = 0
attribute.comment = "Ticketing link"
attribute.tags = [tag]
attribute.value = settings.MISP_TICKETING_URL + "?id=" + str(site.rtir)
misp_api.add_attribute(event=event_id, attribute=attribute)
if site.ip:
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "ip-dst"
attribute.distribution = 5
attribute.comment = "First IP"
attribute.tags = [tag]
attribute.value = site.ip
misp_api.add_attribute(event=event_id, attribute=attribute)
if site.ip_second:
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "ip-dst"
attribute.distribution = 5
attribute.comment = "Second IP"
attribute.tags = [tag]
attribute.value = site.ip_second
misp_api.add_attribute(event=event_id, attribute=attribute)
if site.mail_A_record_ip and site.ip != site.mail_A_record_ip and site.ip_second != site.mail_A_record_ip:
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "ip-dst"
attribute.distribution = 5
attribute.comment = 'Mail Server A record IP: mail.' + site.domain_name
attribute.tags = [tag]
attribute.value = site.mail_A_record_ip
misp_api.add_attribute(event=event_id, attribute=attribute)
if site.MX_records:
for mx in site.MX_records:
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "domain"
attribute.distribution = 5
attribute.comment = "MX record"
attribute.tags = [tag]
attribute.value = str(mx).split()[1][:-1]
misp_api.add_attribute(event=event_id, attribute=attribute)
def update_attributes(misp_api, site):
"""
Update MISP IOCs attributes.
:param misp_api: MISP Object API.
:param site: Site Object.
:return:
"""
print(
str(timezone.now()) + " - " + 'Update MISP IOCs attributes for: ',
site.misp_event_id)
print('-----------------------------')
tag = None
tags = misp_api.tags(pythonify=True)
for t in tags:
if t.name == 'Watcher':
tag = t
if site.ip and not search_attributes(misp_api, site.misp_event_id, site.ip,
site.pk):
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "ip-dst"
attribute.distribution = 5
attribute.comment = "First IP"
attribute.tags = [tag]
attribute.value = site.ip
misp_api.add_attribute(event=site.misp_event_id, attribute=attribute)
if site.ip_second and not search_attributes(misp_api, site.misp_event_id,
site.ip_second, site.pk):
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "ip-dst"
attribute.distribution = 5
attribute.comment = "Second IP"
attribute.tags = [tag]
attribute.value = site.ip_second
misp_api.add_attribute(event=site.misp_event_id, attribute=attribute)
if site.mail_A_record_ip and not search_attributes(
misp_api, site.misp_event_id, site.mail_A_record_ip, site.pk):
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "ip-dst"
attribute.distribution = 5
attribute.comment = 'Mail Server A record IP: mail.' + site.domain_name
attribute.tags = [tag]
attribute.value = site.mail_A_record_ip
misp_api.add_attribute(event=site.misp_event_id, attribute=attribute)
if site.MX_records:
for mx in site.MX_records:
if not search_attributes(misp_api, site.misp_event_id,
str(mx).split()[1][:-1], site.pk):
attribute = MISPAttribute()
attribute.category = "Network activity"
attribute.type = "domain"
attribute.distribution = 5
attribute.comment = "MX record"
attribute.tags = [tag]
attribute.value = str(mx).split()[1][:-1]
misp_api.add_attribute(event=site.misp_event_id,
attribute=attribute)
def _attribute(category, type, value):
attribute = MISPAttribute()
attribute.category = category
attribute.type = type
attribute.value = value
return attribute
# iterate through the list of samples
# - a copy of the 'samples' so that we can updating the
# dictionary while iterating through it; this allows for
# one level of sample crawling. i.e. all samples refered
# to by sampled tagged COVID-19 will be included in the Event
for hash, sample in samples.copy().items():
# get a detailed report of the sample
details = getSampleDetail(hash)
if (details is not None):
# if it exists, add the comment
if ('comment' in details):
comment = details['comment']
if (comment is not None):
newattr = MISPAttribute()
newattr.category = commattr['category']
newattr.type = commattr['type']
newattr.value = commattr['value']
newattr.to_ids = commattr['to_ids']
sample.add_reference(referenced_uuid=newattr.uuid,
relationship_type='related-to')
attributes.update({newattr.value: newattr})
# find and add x-references
if ('file_information' in details):
info = details['file_information']
if (info is not None):
for context_set in info:
context = context_set['context']
value = context_set['value']
