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test_stix20_export.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
from datetime import datetime
from misp_stix_converter import (
MISPtoSTIX20Mapping, MISPtoSTIX20Parser, misp_collection_to_stix2,
misp_to_stix2)
from pymisp import MISPAttribute, MISPEvent
from .test_events import *
from .update_documentation import (
AttributesDocumentationUpdater, GalaxiesDocumentationUpdater,
ObjectsDocumentationUpdater)
from ._test_stix import TestSTIX20
from ._test_stix_export import TestCollectionSTIX2Export, TestSTIX2Export, TestSTIX20Export
class TestSTIX20GenericExport(TestSTIX20Export, TestSTIX20):
def setUp(self):
self.parser = MISPtoSTIX20Parser()
def _check_bundle_features(self, length):
bundle = self.parser.bundle
self.assertEqual(bundle.type, 'bundle')
self.assertEqual(bundle.spec_version, '2.0')
self.assertEqual(len(bundle.objects), length)
return bundle
class TestSTIX20EventExport(TestSTIX20GenericExport):
def _check_analyst_note(self, stix_object, misp_layer):
self.assertEqual(
stix_object.id, f"x-misp-analyst-note--{misp_layer['uuid']}"
)
self.assertEqual(stix_object.x_misp_note, misp_layer['note'])
self.assertEqual(stix_object.x_misp_author, misp_layer['authors'])
self.assertEqual(stix_object.x_misp_language, misp_layer['language'])
self.assertEqual(
stix_object.created, self._datetime_from_str(misp_layer['created'])
)
self.assertEqual(
stix_object.modified,
self._datetime_from_str(misp_layer['modified'])
)
def _check_analyst_opinion(self, stix_object, misp_layer):
self.assertEqual(
stix_object.id, f"x-misp-analyst-opinion--{misp_layer['uuid']}"
)
self.assertEqual(stix_object.x_misp_opinion, int(misp_layer['opinion']))
self.assertEqual(stix_object.x_misp_author, misp_layer['authors'])
self.assertEqual(stix_object.x_misp_comment, misp_layer['comment'])
self.assertEqual(
stix_object.created, self._datetime_from_str(misp_layer['created'])
)
self.assertEqual(
stix_object.modified,
self._datetime_from_str(misp_layer['modified'])
)
def _check_opinion_features(self, opinion, sighting, object_id):
self.assertEqual(opinion.type, 'x-misp-opinion')
self.assertEqual(opinion.id, f"x-misp-opinion--{sighting['uuid']}")
self._assert_multiple_equal(
opinion.created,
opinion.modified,
self._datetime_from_timestamp(sighting['date_sighting'])
)
self.assertEqual(opinion.object_ref, object_id)
self.assertEqual(opinion.x_misp_author, sighting['Organisation']['name'])
self.assertEqual(
opinion.x_misp_author_ref,
f"identity--{sighting['Organisation']['uuid']}"
)
self.assertEqual(opinion.x_misp_explanation, "False positive Sighting")
self.assertEqual(opinion.x_misp_opinion, "strongly-disagree")
def _test_base_event(self, event):
orgc = event['Orgc']
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(3)
identity, report, custom = bundle.objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_ref = self._check_report_features(report, event, identity_id, timestamp)[0]
self.assertEqual(report.published, timestamp)
self.assertEqual(custom.type, 'x-misp-event-note')
self._assert_multiple_equal(
custom.id,
f"x-misp-event-note--{event['uuid']}",
object_ref
)
self.assertEqual(custom.created_by_ref, identity_id)
self.assertEqual(custom.created, timestamp)
self.assertEqual(custom.modified, timestamp)
self.assertEqual(custom.object_ref, report.id)
self.assertEqual(
custom.x_misp_event_note,
"This MISP Event is empty and contains no attribute, object, galaxy or tag."
)
def _test_event_with_analyst_data(self, event):
orgc = event['Orgc']
event_report = event['EventReport'][0]
note = event['Note'][0]
src_attribute, dst_attribute = event['Attribute']
misp_object = event['Object'][0]
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(13)
identity, report, *stix_objects = bundle.objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.published, timestamp)
for stix_object, object_ref in zip(stix_objects, object_refs):
self.assertEqual(stix_object.id, object_ref)
(attr_indicator, attr_opinion, observed_data, observed_data_note,
obj_indicator, obj_opinion, obj_attr_note, report, report_opinion,
relationship, event_note) = stix_objects
self._assert_multiple_equal(
attr_indicator.id,
relationship.target_ref,
attr_opinion.object_ref,
f"indicator--{src_attribute['uuid']}"
)
self._assert_multiple_equal(
attr_opinion.type,
obj_opinion.type,
report_opinion.type,
'x-misp-analyst-opinion'
)
attribute_opinion = src_attribute['Opinion'][0]
self._check_analyst_opinion(attr_opinion, attribute_opinion)
self._assert_multiple_equal(
observed_data.id,
observed_data_note.object_ref,
f"observed-data--{dst_attribute['uuid']}"
)
self._assert_multiple_equal(
observed_data_note.type,
obj_attr_note.type,
event_note.type,
'x-misp-analyst-note'
)
attribute_note = dst_attribute['Note'][0]
self._check_analyst_note(observed_data_note, attribute_note)
self._assert_multiple_equal(
obj_indicator.id,
relationship.source_ref,
obj_opinion.object_ref,
obj_attr_note.object_ref,
f"indicator--{misp_object['uuid']}"
)
object_opinion = misp_object['Opinion'][0]
self._check_analyst_opinion(obj_opinion, object_opinion)
object_attribute_note = misp_object['Attribute'][0]['Note'][0]
self._check_analyst_note(obj_attr_note, object_attribute_note)
self._assert_multiple_equal(
report.id,
report_opinion.object_ref,
f"x-misp-event-report--{event_report['uuid']}"
)
self.assertEqual(report.type, 'x-misp-event-report')
event_report_opinion = event_report['Opinion'][0]
self._check_analyst_opinion(report_opinion, event_report_opinion)
self.assertEqual(relationship.relationship_type, 'downloaded-from')
self._check_analyst_note(event_note, note)
def _test_event_with_escaped_characters(self, event):
attributes = deepcopy(event['Attribute'])
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(48)
_, _, *indicators = bundle.objects
self.assertIn(attributes[0]['value'][2:], indicators[0].pattern)
for attribute, indicator in zip(attributes[1:], indicators[1:]):
self.assertEqual(indicator.type, 'indicator')
attribute_value = attribute['value']
if '|' in attribute_value:
attribute_value, value = attribute_value.split('|')
self.assertIn(self._sanitize_pattern_value(value), indicator.pattern)
self.assertIn(self._sanitize_pattern_value(attribute_value), indicator.pattern)
if attribute.get('data'):
data = attribute['data']
if not isinstance(data, str):
data = b64encode(data.getvalue()).decode()
self.assertIn(self._sanitize_pattern_value(data), indicator.pattern)
def _test_event_with_event_report(self, event):
orgc = event['Orgc']
event_report = event['EventReport'][0]
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(6)
identity, report, *stix_objects = bundle.objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.published, timestamp)
for stix_object, object_ref in zip(stix_objects, object_refs):
self.assertEqual(stix_object.id, object_ref)
ip_src, observed_data, domain_ip, note = stix_objects
self.assertEqual(note.id, f"x-misp-event-report--{event_report['uuid']}")
timestamp = event_report['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
self._assert_multiple_equal(note.created, note.modified, timestamp)
self.assertEqual(note.x_misp_content, event_report['content'])
self.assertEqual(note.x_misp_name, event_report['name'])
object_refs = note.object_refs
self.assertEqual(len(object_refs), 3)
object_ids = {ip_src.id, observed_data.id, domain_ip.id}
self.assertEqual(set(object_refs), object_ids)
def _test_event_with_sightings(self, event):
orgc = event['Orgc']
attribute1, attribute2 = event['Attribute']
sightings1 = attribute1['Sighting']
sightings2 = attribute2['Sighting']
self.parser.parse_misp_event(event)
identity, identity1, identity2, identity3, identity4, report, *stix_objects = self.parser.stix_objects
identities = (identity1, identity2, identity3, identity4)
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
for stix_object, object_ref in zip(stix_objects, object_refs):
self.assertEqual(stix_object.id, object_ref)
self._check_identities_from_sighting(
identities,
tuple(f"identity--{sighting['Organisation']['uuid']}" for sighting in sightings1),
tuple(sighting['Organisation']['name'] for sighting in sightings2)
)
observed_data, sighting1, sighting2, opinion1, opinion2, indicator, sighting3, opinion3, sighting4, opinion4 = stix_objects
self._check_sighting_features(
sighting1,
sightings1[0],
observed_data.id,
identity1.id
)
self._check_sighting_features(
sighting2,
sightings1[1],
observed_data.id,
identity2.id
)
self._check_opinion_features(
opinion1,
sightings1[2],
observed_data.id
)
self._check_opinion_features(
opinion2,
sightings1[3],
observed_data.id
)
self._check_sighting_features(
sighting3,
sightings2[0],
indicator.id,
identity1.id
)
self._check_opinion_features(
opinion3,
sightings2[1],
indicator.id
)
self._check_sighting_features(
sighting4,
sightings2[2],
indicator.id,
identity3.id
)
self._check_opinion_features(
opinion4,
sightings2[3],
indicator.id
)
def _test_event_with_tags(self, event):
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(4)
_, _, _, marking = bundle.objects
self.assertEqual(marking.definition_type, 'tlp')
self.assertEqual(marking.definition['tlp'], 'white')
def _test_published_event(self, event):
orgc = event['Orgc']
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(3)
identity, report, _ = bundle.objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.created, timestamp)
self.assertEqual(report.modified, timestamp)
publish_timestamp = event['publish_timestamp']
if not isinstance(publish_timestamp, datetime):
publish_timestamp = self._datetime_from_timestamp(publish_timestamp)
self.assertEqual(report.published, publish_timestamp)
class TestSTIX20JSONEventExport(TestSTIX20EventExport):
def test_base_event(self):
event = get_base_event()
self._test_base_event(event['Event'])
def test_event_with_analyst_data(self):
event = get_event_with_analyst_data()
self._test_event_with_analyst_data(event['Event'])
def test_event_with_escaped_characters(self):
event = get_event_with_escaped_values_v20()
self._test_event_with_escaped_characters(event['Event'])
def test_event_with_event_report(self):
event = get_event_with_event_report()
self._test_event_with_event_report(event['Event'])
def test_event_with_sightings(self):
event = get_event_with_sightings()
self._test_event_with_sightings(event['Event'])
def test_event_with_tags(self):
event = get_event_with_tags()
self._test_event_with_tags(event['Event'])
def test_published_event(self):
event = get_published_event()
self._test_published_event(event['Event'])
class TestSTIX20MISPEventExport(TestSTIX20EventExport):
def test_base_event(self):
event = get_base_event()
misp_event = MISPEvent()
misp_event.from_dict(**event)
self._test_base_event(misp_event)
def test_event_with_analyst_data(self):
event = get_event_with_analyst_data()
misp_event = MISPEvent()
misp_event.from_dict(**event)
self._test_event_with_analyst_data(misp_event)
def test_event_with_escaped_characters(self):
event = get_event_with_escaped_values_v20()
misp_event = MISPEvent()
misp_event.from_dict(**event)
self._test_event_with_escaped_characters(misp_event)
def test_event_with_event_report(self):
event = get_event_with_event_report()
misp_event = MISPEvent()
misp_event.from_dict(**event)
self._test_event_with_event_report(misp_event)
def test_event_with_sightings(self):
event = get_event_with_sightings()
misp_event = MISPEvent()
misp_event.from_dict(**event)
self._test_event_with_sightings(misp_event)
def test_event_with_tags(self):
event = get_event_with_tags()
misp_event = MISPEvent()
misp_event.from_dict(**event)
self._test_event_with_tags(misp_event)
def test_published_event(self):
event = get_published_event()
misp_event = MISPEvent()
misp_event.from_dict(**event)
self._test_published_event(misp_event)
class TestSTIX20AttributesExport(TestSTIX20GenericExport):
_http_features = ('request_method', "request_header.'User-Agent'")
_http_prefix = f"network-traffic:extensions.'http-request-ext'"
def _check_hash_composite_indicator_attribute(self, attribute, indicator):
filename, hash_value = attribute['value'].split('|')
hash_type = attribute['type'].split('|')[1]
if '/' in hash_type:
hash_type = f"SHA{hash_type.split('/')[1]}"
filename_pattern = f"file:name = '{filename}'"
hash_pattern = f"file:hashes.{hash_type.replace('-', '').upper()} = '{hash_value}'"
self.assertEqual(indicator.pattern, f"[{filename_pattern} AND {hash_pattern}]")
def _check_hash_composite_observable_attribute(self, attribute, observed_data):
filename, hash_value = attribute['value'].split('|')
observable_object = observed_data['objects']['0']
self.assertEqual(observable_object.type, 'file')
self.assertEqual(observable_object.name, filename)
hash_type = self.hash_types_mapping(attribute['type'].split('|')[1])
self.assertEqual(observable_object.hashes[hash_type], hash_value)
def _check_hash_indicator_attribute(self, attribute, indicator):
hash_type = attribute['type']
if '/' in hash_type:
hash_type = f"SHA{hash_type.split('/')[1]}"
self.assertEqual(
indicator.pattern,
f"[file:hashes.{hash_type.replace('-', '').upper()} = '{attribute['value']}']"
)
def _check_hash_observable_attribute(self, attribute, observed_data):
hash_type = self.hash_types_mapping(attribute['type'])
observable_object = observed_data['objects']['0']
self.assertEqual(observable_object.type, 'file')
self.assertEqual(observable_object.hashes[hash_type], attribute['value'])
def _check_ip_indicator_attribute(self, attribute, indicator):
feature = attribute['type'].split('-')[1]
type_pattern = f"network-traffic:{feature}_ref.type = 'ipv4-addr'"
value_pattern = f"network-traffic:{feature}_ref.value = '{attribute['value']}'"
self.assertEqual(indicator.pattern, f"[{type_pattern} AND {value_pattern}]")
def _check_ip_observable_attribute(self, attribute, observed_data):
feature = attribute['type'].split('-')[1]
network, address = observed_data['objects'].values()
self.assertEqual(network.type, 'network-traffic')
self.assertEqual(getattr(network, f'{feature}_ref'), '1')
self.assertEqual(address.type, 'ipv4-addr')
self.assertEqual(address.value, attribute['value'])
def _check_ip_port_indicator_attribute(self, attribute, indicator):
feature = attribute['type'].split('|')[0].split('-')[1]
ip_value, port_value = attribute['value'].split('|')
type_pattern = f"network-traffic:{feature}_ref.type = 'ipv4-addr'"
ip_pattern = f"network-traffic:{feature}_ref.value = '{ip_value}'"
port_pattern = f"network-traffic:{feature}_port = '{port_value}'"
self.assertEqual(indicator.pattern, f"[{type_pattern} AND {ip_pattern} AND {port_pattern}]")
def _check_ip_port_observable_attribute(self, attribute, observed_data):
feature = attribute['type'].split('|')[0].split('-')[1]
ip_value, port_value = attribute['value'].split('|')
network, address = observed_data['objects'].values()
self.assertEqual(network.type, 'network-traffic')
self.assertEqual(getattr(network, f'{feature}_ref'), '1')
self.assertEqual(getattr(network, f'{feature}_port'), int(port_value))
self.assertEqual(address.type, 'ipv4-addr')
self.assertEqual(address.value, ip_value)
def _check_url_observable_attribute(self, attribute, observed_data):
observable = observed_data.objects['0']
self.assertEqual(observable.type, 'url')
self.assertEqual(observable.value, attribute['value'])
def _check_x509_fingerprint_observable_attribute(self, attribute, observed_data):
observable_object = observed_data['objects']['0']
self.assertEqual(observable_object.type, 'x509-certificate')
hash_type = self.hash_types_mapping(attribute['type'].split('-')[-1])
self.assertEqual(observable_object.hashes[hash_type], attribute['value'])
def _run_indicator_tests(self, event):
self._add_attribute_ids_flag(event)
orgc = event['Orgc']
attribute = event['Attribute'][0]
self.parser.parse_misp_event(event)
identity, report, indicator = self.parser.stix_objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_ref = self._check_report_features(report, event, identity_id, timestamp)[0]
self.assertEqual(report.published, timestamp)
self._check_attribute_indicator_features(indicator, attribute, identity_id, object_ref)
return attribute['value'], indicator.pattern
def _run_indicators_tests(self, event):
self._add_attribute_ids_flag(event)
orgc = event['Orgc']
attributes = event['Attribute']
self.parser.parse_misp_event(event)
identity, report, *indicators = self.parser.stix_objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.published, timestamp)
for attribute, indicator, object_ref in zip(attributes, indicators, object_refs):
self._check_attribute_indicator_features(indicator, attribute, identity_id, object_ref)
return attributes, indicators
def _run_observable_tests(self, event):
self._remove_attribute_ids_flag(event)
orgc = event['Orgc']
attribute = event['Attribute'][0]
self.parser.parse_misp_event(event)
identity, report, observed_data = self.parser.stix_objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_ref = self._check_report_features(report, event, identity_id, timestamp)[0]
self.assertEqual(report.published, timestamp)
self._check_attribute_observable_features(
observed_data,
attribute,
identity_id,
object_ref
)
return attribute['value'], observed_data['objects']
def _run_observables_tests(self, event):
self._remove_attribute_ids_flag(event)
orgc = event['Orgc']
attributes = event['Attribute']
self.parser.parse_misp_event(event)
identity, report, *observables = self.parser.stix_objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.published, timestamp)
for attribute, observed_data, object_ref in zip(attributes, observables, object_refs):
self._check_attribute_observable_features(
observed_data,
attribute,
identity_id,
object_ref
)
return attributes, observables
def _test_embedded_indicator_attribute_galaxy(self, event):
orgc = event['Orgc']
attribute = event['Attribute'][0]
event_galaxy = deepcopy(event['Galaxy'][0])
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(10)
identity, report, attack_pattern, course_of_action, custom, indicator, malware, *relationships = bundle.objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.published, timestamp)
ap_ref, coa_ref, custom_ref, indicator_ref, malware_ref, apr_ref, coar_ref, customr_ref = object_refs
ap_relationship, coa_relationship, custom_relationship = relationships
ap_galaxy, coa_galaxy, custom_galaxy = attribute['Galaxy']
self._assert_multiple_equal(
attack_pattern.id,
ap_ref,
f"attack-pattern--{ap_galaxy['GalaxyCluster'][0]['uuid']}"
)
self._assert_multiple_equal(
course_of_action.id,
coa_ref,
f"course-of-action--{coa_galaxy['GalaxyCluster'][0]['uuid']}"
)
self._assert_multiple_equal(
custom.id,
custom_ref,
f"x-misp-galaxy-cluster--{custom_galaxy['GalaxyCluster'][0]['uuid']}"
)
self._assert_multiple_equal(
indicator.id,
indicator_ref,
f"indicator--{attribute['uuid']}"
)
self._assert_multiple_equal(
malware.id,
malware_ref,
f"malware--{event_galaxy['GalaxyCluster'][0]['uuid']}"
)
self._assert_multiple_equal(ap_relationship.id, apr_ref)
self._assert_multiple_equal(coa_relationship.id, coar_ref)
self.assertEqual(custom_relationship.id, customr_ref)
timestamp = attribute['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
self._check_relationship_features(ap_relationship, indicator_ref, ap_ref, 'indicates', timestamp)
self._check_relationship_features(coa_relationship, indicator_ref, coa_ref, 'related-to', timestamp)
self._check_relationship_features(custom_relationship, indicator_ref, custom_ref, 'related-to', timestamp)
def _test_embedded_non_indicator_attribute_galaxy(self, event):
orgc = event['Orgc']
attribute = event['Attribute'][0]
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(8)
identity, report, attack_pattern, course_of_action, vulnerability, malware, *relationships = bundle.objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.published, timestamp)
ap_ref, coa_ref, vulnerability_ref, malware_ref, apr_ref, coar_ref = object_refs
ap_relationship, coa_relationship = relationships
self.assertEqual(attack_pattern.id, ap_ref)
self.assertEqual(course_of_action.id, coa_ref)
self.assertEqual(vulnerability.id, vulnerability_ref)
self.assertEqual(malware.id, malware_ref)
self.assertEqual(ap_relationship.id, apr_ref)
self.assertEqual(coa_relationship.id, coar_ref)
timestamp = attribute['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
self._check_relationship_features(ap_relationship, vulnerability_ref, ap_ref, 'related-to', timestamp)
self._check_relationship_features(coa_relationship, vulnerability_ref, coa_ref, 'related-to', timestamp)
def _test_embedded_observable_attribute_galaxy(self, event):
orgc = event['Orgc']
attribute = event['Attribute'][0]
self.parser.parse_misp_event(event)
bundle = self._check_bundle_features(6)
identity, report, attack_pattern, observed_data, malware, relationship = bundle.objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.published, timestamp)
ap_ref, od_ref, malware_ref, relationship_ref = object_refs
self.assertEqual(attack_pattern.id, ap_ref)
self.assertEqual(observed_data.id, od_ref)
self.assertEqual(malware.id, malware_ref)
self.assertEqual(relationship.id, relationship_ref)
timestamp = attribute['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
self._check_relationship_features(
relationship, od_ref, ap_ref, 'related-to', timestamp
)
def _test_event_with_as_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
number = self._parse_AS_value(attribute_value)
self.assertEqual(pattern, f"[autonomous-system:number = '{number}']")
def _test_event_with_as_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
observable = observable_objects['0']
self.assertEqual(observable.type, 'autonomous-system')
number = self._parse_AS_value(attribute_value)
self.assertEqual(observable.number, number)
def _test_event_with_attachment_indicator_attribute(self, event):
data = event['Attribute'][0]['data']
if not isinstance(data, str):
data = b64encode(data.getvalue()).decode()
attribute_value, pattern = self._run_indicator_tests(event)
file_pattern = f"file:name = '{attribute_value}'"
data_pattern = f"file:content_ref.payload_bin = '{data}'"
self.assertEqual(pattern, f"[{file_pattern} AND {data_pattern}]")
def _test_event_with_attachment_observable_attribute(self, event):
data = event['Attribute'][0]['data']
if not isinstance(data, str):
data = b64encode(data.getvalue()).decode()
attribute_value, observable_objects = self._run_observable_tests(event)
file_object, artifact_object = observable_objects.values()
self.assertEqual(file_object.type, 'file')
self.assertEqual(file_object.name, attribute_value)
self.assertEqual(file_object.content_ref, '1')
self.assertEqual(artifact_object.type, 'artifact')
self.assertEqual(artifact_object.payload_bin, data)
def _test_event_with_campaign_name_attribute(self, event):
self._remove_attribute_ids_flag(event)
orgc = event['Orgc']
attribute = event['Attribute'][0]
self.parser.parse_misp_event(event)
identity, report, campaign = self.parser.stix_objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_ref = self._check_report_features(report, event, identity_id, timestamp)[0]
self.assertEqual(report.published, timestamp)
self._check_attribute_campaign_features(
campaign,
attribute,
identity_id,
object_ref
)
self.assertEqual(campaign.name, attribute['value'])
def _test_event_with_custom_attributes(self, event):
orgc = event['Orgc']
attributes = event['Attribute']
self.parser.parse_misp_event(event)
identity, report, *custom_objects = self.parser.stix_objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_refs = self._check_report_features(report, event, identity_id, timestamp)
self.assertEqual(report.published, timestamp)
for attribute, custom_object, object_ref in zip(attributes, custom_objects, object_refs):
self._run_custom_attribute_tests(attribute, custom_object, object_ref, identity_id)
def _test_event_with_domain_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[domain-name:value = '{attribute_value}']")
def _test_event_with_domain_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
observable = observable_objects['0']
self.assertEqual(observable.type, 'domain-name')
self.assertEqual(observable.value, attribute_value)
def _test_event_with_domain_ip_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
domain, ip = attribute_value.split('|')
domain_pattern = f"domain-name:value = '{domain}'"
ip_pattern = f"domain-name:resolves_to_refs[*].value = '{ip}'"
self.assertEqual(pattern, f'[{domain_pattern} AND {ip_pattern}]')
def _test_event_with_domain_ip_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
domain, ip = attribute_value.split('|')
domain_object, address_object = observable_objects.values()
self.assertEqual(domain_object.type, 'domain-name')
self.assertEqual(domain_object.value, domain)
self.assertEqual(domain_object.resolves_to_refs, ['1'])
self.assertEqual(address_object.type, 'ipv4-addr')
self.assertEqual(address_object.value, ip)
def _test_event_with_email_attachment_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(
pattern,
f"[email-message:body_multipart[*].body_raw_ref.name = '{attribute_value}']"
)
def _test_event_with_email_attachment_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
email_object, file_object = observable_objects.values()
self.assertEqual(email_object.type, 'email-message')
self.assertEqual(email_object.is_multipart, True)
body = email_object.body_multipart[0]
self.assertEqual(body.content_disposition, f"attachment; filename='{attribute_value}'")
self.assertEqual(body.body_raw_ref, '1')
self.assertEqual(file_object.type, 'file')
self.assertEqual(file_object.name, attribute_value)
def _test_event_with_email_body_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(
pattern,
f"[email-message:body = '{attribute_value}']"
)
def _test_event_with_email_body_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
email_object = observable_objects['0']
self.assertEqual(email_object.type, 'email-message')
self.assertEqual(email_object.is_multipart, False)
self.assertEqual(email_object.body, attribute_value)
def _test_event_with_email_destination_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[email-message:to_refs[*].value = '{attribute_value}']")
def _test_event_with_email_destination_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
message, address = observable_objects.values()
self.assertEqual(message.type, 'email-message')
self.assertEqual(message.is_multipart, False)
self.assertEqual(message.to_refs, ['1'])
self._check_email_address(address, attribute_value)
def _test_event_with_email_header_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[email-message:received_lines = '{attribute_value}']")
def _test_event_with_email_header_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
message_object = observable_objects['0']
self.assertEqual(message_object.type, 'email-message')
self.assertEqual(message_object.is_multipart, False)
self.assertEqual(message_object.received_lines, [attribute_value])
def _test_event_with_email_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[email-addr:value = '{attribute_value}']")
def _test_event_with_email_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
address_object = observable_objects['0']
self._check_email_address(address_object, attribute_value)
def _test_event_with_email_reply_to_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(
pattern,
f"[email-message:additional_header_fields.reply_to = '{attribute_value}']"
)
def _test_event_with_email_reply_to_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
message = observable_objects['0']
self.assertEqual(message.type, 'email-message')
self.assertEqual(message.is_multipart, False)
self.assertEqual(message.additional_header_fields['Reply-To'], attribute_value)
def _test_event_with_email_source_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[email-message:from_ref.value = '{attribute_value}']")
def _test_event_with_email_source_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
message, address = observable_objects.values()
self.assertEqual(message.type, 'email-message')
self.assertEqual(message.is_multipart, False)
self.assertEqual(message.from_ref, '1')
self._check_email_address(address, attribute_value)
def _test_event_with_email_subject_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[email-message:subject = '{attribute_value}']")
def _test_event_with_email_subject_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
message = observable_objects['0']
self.assertEqual(message.type, 'email-message')
self.assertEqual(message.is_multipart, False)
self.assertEqual(message.subject, attribute_value)
def _test_event_with_email_x_mailer_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(
pattern,
f"[email-message:additional_header_fields.x_mailer = '{attribute_value}']"
)
def _test_event_with_email_x_mailer_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
message = observable_objects['0']
self.assertEqual(message.type, 'email-message')
self.assertEqual(message.is_multipart, False)
self.assertEqual(message.additional_header_fields['X-Mailer'], attribute_value)
def _test_event_with_filename_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[file:name = '{attribute_value}']")
def _test_event_with_filename_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
observable = observable_objects['0']
self.assertEqual(observable.type, 'file')
self.assertEqual(observable.name, attribute_value)
def _test_event_with_github_username_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(
pattern,
f"[user-account:account_type = 'github' AND user-account:account_login = '{attribute_value}']"
)
def _test_event_with_hostname_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[domain-name:value = '{attribute_value}']")
def _test_event_with_hostname_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
observable = observable_objects['0']
self.assertEqual(observable.type, 'domain-name')
self.assertEqual(observable.value, attribute_value)
def _test_event_with_hostname_port_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
hostname, port = attribute_value.split('|')
hostname_pattern = f"domain-name:value = '{hostname}'"
port_pattern = f"network-traffic:dst_port = '{port}'"
self.assertEqual(pattern, f"[{hostname_pattern} AND {port_pattern}]")
def _test_event_with_hostname_port_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
hostname, port = attribute_value.split('|')
domain_object, network_traffic_object = observable_objects.values()
self.assertEqual(domain_object.type, 'domain-name')
self.assertEqual(domain_object.value, hostname)
self.assertEqual(network_traffic_object.type, 'network-traffic')
self.assertEqual(network_traffic_object.dst_port, int(port))
self.assertEqual(network_traffic_object.dst_ref, '0')
def _test_event_with_mac_address_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[mac-addr:value = '{attribute_value}']")
def _test_event_with_mac_address_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
observable = observable_objects['0']
self.assertEqual(observable.type, 'mac-addr')
self.assertEqual(observable.value, attribute_value.lower())
def _test_event_with_malware_sample_indicator_attribute(self, event):
data = event['Attribute'][0]['data']
if not isinstance(data, str):
data = b64encode(data.getvalue()).decode()
attribute_value, pattern = self._run_indicator_tests(event)
filename, hash_value = attribute_value.split('|')
data_pattern, file_pattern, hash_pattern, mime_type = pattern[1:-1].split(' AND ')
self.assertEqual(data_pattern, f"file:content_ref.payload_bin = '{data}'")
self.assertEqual(file_pattern, f"file:name = '{filename}'")
self.assertEqual(hash_pattern, f"file:hashes.MD5 = '{hash_value}'")
self.assertEqual(mime_type, f"file:content_ref.mime_type = 'application/zip'")
def _test_event_with_malware_sample_observable_attribute(self, event):
data = event['Attribute'][0]['data']
if not isinstance(data, str):
data = b64encode(data.getvalue()).decode()
attribute_value, observable_objects = self._run_observable_tests(event)
file_object, artifact_object = observable_objects.values()
filename, hash_value = attribute_value.split('|')
self.assertEqual(file_object.type, 'file')
self.assertEqual(file_object.name, filename)
self.assertEqual(file_object.hashes['MD5'], hash_value)
self.assertEqual(file_object.content_ref, '1')
self.assertEqual(artifact_object.type, 'artifact')
self.assertEqual(artifact_object.payload_bin, data)
def _test_event_with_mutex_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[mutex:name = '{attribute_value}']")
def _test_event_with_mutex_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
observable = observable_objects['0']
self.assertEqual(observable.type, 'mutex')
self.assertEqual(observable.name, attribute_value)
def _test_event_with_port_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[network-traffic:dst_port = '{attribute_value}']")
def _test_event_with_regkey_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(
pattern.replace('\\\\', '\\'),
f"[windows-registry-key:key = '{attribute_value.strip()}']"
)
def _test_event_with_regkey_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
observable = observable_objects['0']
self.assertEqual(observable.type, 'windows-registry-key')
self.assertEqual(observable.key, attribute_value.strip())
def _test_event_with_regkey_value_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
key, value = attribute_value.split('|')
key_pattern = f"windows-registry-key:key = '{self._sanitize_registry_key_value(key)}'"
value_pattern = f"windows-registry-key:values.data = '{self._sanitize_registry_key_value(value)}'"
self.assertEqual(pattern, f"[{key_pattern} AND {value_pattern}]")
def _test_event_with_regkey_value_observable_attribute(self, event):
attribute_value, observable_objects = self._run_observable_tests(event)
key, value = attribute_value.split('|')
observable = observable_objects['0']
self.assertEqual(observable.type, 'windows-registry-key')
self.assertEqual(observable.key, key.strip())
self.assertEqual(observable['values'][0].data, value.strip())
def _test_event_with_size_in_bytes_indicator_attribute(self, event):
attribute_value, pattern = self._run_indicator_tests(event)
self.assertEqual(pattern, f"[file:size = '{attribute_value}']")
def _test_event_with_vulnerability_attribute(self, event):
self._add_attribute_ids_flag(event)
orgc = event['Orgc']
attribute = event['Attribute'][0]
self.parser.parse_misp_event(event)
identity, report, vulnerability = self.parser.stix_objects
timestamp = event['timestamp']
if not isinstance(timestamp, datetime):
timestamp = self._datetime_from_timestamp(timestamp)
identity_id = self._check_identity_features(identity, orgc, timestamp)
object_ref = self._check_report_features(report, event, identity_id, timestamp)[0]
self.assertEqual(report.published, timestamp)
self._check_attribute_vulnerability_features(
vulnerability,
attribute,
identity_id,
object_ref
)
self.assertEqual(vulnerability.name, attribute['value'])
self._check_external_reference(
vulnerability.external_references[0],
'cve',
attribute['value']
)
class TestSTIX20JSONAttributesExport(TestSTIX20AttributesExport):
@classmethod
def tearDownClass(self):
attributes_documentation = AttributesDocumentationUpdater(
'misp_attributes_to_stix20',