mirror of
https://github.com/MISP/misp-galaxy.git
synced 2024-11-22 23:07:19 +00:00
259 lines
8.8 KiB
Python
Executable file
259 lines
8.8 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
#
|
|
# A simple convertor of the MITRE D3FEND to a MISP Galaxy datastructure.
|
|
# Copyright (C) 2024 Christophe Vandeplas
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Affero General Public License as
|
|
# published by the Free Software Foundation, either version 3 of the
|
|
# License, or (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Affero General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import json
|
|
import os
|
|
import requests
|
|
import uuid
|
|
|
|
d3fend_url = 'https://d3fend.mitre.org/ontologies/d3fend.json'
|
|
d3fend_full_mappings_url = 'https://d3fend.mitre.org/api/ontology/inference/d3fend-full-mappings.json'
|
|
|
|
# we love eating lots of memory
|
|
r = requests.get(d3fend_url)
|
|
d3fend_json = r.json()
|
|
|
|
r = requests.get(d3fend_full_mappings_url)
|
|
d3fend_mappings_json = r.json()
|
|
|
|
with open('../clusters/mitre-attack-pattern.json', 'r') as mitre_f:
|
|
mitre = json.load(mitre_f)
|
|
|
|
|
|
uuid_seed = '35527064-12b4-4b73-952b-6d76b9f1b1e3'
|
|
|
|
tactics = {} # key = tactic, value = phases
|
|
phases_ids = []
|
|
techniques_ids = []
|
|
techniques = []
|
|
relations = {}
|
|
|
|
|
|
def get_as_list(item):
|
|
if isinstance(item, dict):
|
|
return item.values()
|
|
elif isinstance(item, list):
|
|
result = []
|
|
for i in item:
|
|
if isinstance(i, dict):
|
|
result += i.values()
|
|
if isinstance(i, str):
|
|
result.append(i)
|
|
return result
|
|
elif isinstance(item, str):
|
|
return [item]
|
|
else:
|
|
raise ValueError(f'Unexpected type: {type(item)}')
|
|
|
|
|
|
def is_val_in_element(val, element):
|
|
result = False
|
|
if isinstance(element, dict): # only one entry
|
|
if val == element['@id']:
|
|
return True
|
|
elif isinstance(element, list): # multiple entries
|
|
for e in element:
|
|
if val == e['@id']:
|
|
return True
|
|
elif not element:
|
|
pass
|
|
else:
|
|
raise ValueError(f'Unexpected type: {type(element)}')
|
|
return result
|
|
|
|
|
|
def is_element_in_list(element, lst):
|
|
if isinstance(element, dict): # only one entry
|
|
if element['@id'] in lst:
|
|
return True
|
|
|
|
elif isinstance(element, list): # multiple entries
|
|
for e in element:
|
|
if e['@id'] in lst:
|
|
return True
|
|
else:
|
|
raise ValueError(f'Unexpected type: {type(element)}')
|
|
|
|
|
|
def id_to_label(id):
|
|
return data[id]['rdfs:label']
|
|
|
|
|
|
def get_parent(item):
|
|
# value of subClassOf starts with d3f
|
|
if 'rdfs:subClassOf' in item:
|
|
# if 'd3f:enables' in item:
|
|
# parent_classes = get_as_list(item['d3f:enables'])
|
|
# else:
|
|
parent_classes = get_as_list(item['rdfs:subClassOf'])
|
|
for parent_class in parent_classes:
|
|
if parent_class.startswith('d3f'):
|
|
return parent_class
|
|
return None
|
|
|
|
|
|
def find_kill_chain_of(original_item):
|
|
# find if back in the kill chain_tactics list we built before
|
|
parent_classes = get_as_list(original_item['rdfs:subClassOf'])
|
|
for parent_class in parent_classes:
|
|
if parent_class.startswith('d3f'):
|
|
parent_class_name = id_to_label(parent_class).replace(' ', '-')
|
|
for tactic, phases in kill_chain_tactics.items():
|
|
if parent_class_name in phases:
|
|
return f"{tactic}:{parent_class_name}"
|
|
# child with one more parent in between
|
|
for parent_class in parent_classes:
|
|
if parent_class.startswith('d3f'):
|
|
return find_kill_chain_of(data[parent_class])
|
|
|
|
|
|
def find_mitre_uuid_from_technique_id(technique_id):
|
|
for item in mitre['values']:
|
|
if item['meta']['external_id'] == technique_id:
|
|
return item['uuid']
|
|
print("No MITRE UUID found for technique_id: ", technique_id)
|
|
return None
|
|
|
|
|
|
# relationships
|
|
for item in d3fend_mappings_json['results']['bindings']:
|
|
d3fend_technique = item['def_tech_label']['value']
|
|
attack_technique = item['off_tech_label']['value']
|
|
attack_technique_id = item['off_tech']['value'].split('#')[-1]
|
|
# print(f"Mapping: {d3fend_technique} -> {attack_technique} ({attack_technique_id})")
|
|
dest_uuid = find_mitre_uuid_from_technique_id(attack_technique_id)
|
|
if dest_uuid:
|
|
rel_type = item['def_artifact_rel_label']['value']
|
|
if d3fend_technique not in relations:
|
|
relations[d3fend_technique] = []
|
|
relations[d3fend_technique].append(
|
|
{
|
|
'dest-uuid': dest_uuid,
|
|
'type': rel_type
|
|
}
|
|
)
|
|
|
|
|
|
# first convert as dict with key = @id
|
|
data = {}
|
|
for item in d3fend_json['@graph']:
|
|
data[item['@id']] = item
|
|
|
|
# tactic
|
|
for item in d3fend_json['@graph']:
|
|
if is_val_in_element('d3f:DefensiveTactic', item.get('rdfs:subClassOf')):
|
|
tactics[item['rdfs:label']] = {
|
|
'order': item['d3f:display-order'],
|
|
'phases': []
|
|
}
|
|
print(f"Tactic: {item['rdfs:label']}")
|
|
|
|
# phases
|
|
for item in d3fend_json['@graph']:
|
|
if 'rdfs:subClassOf' in item:
|
|
if is_val_in_element('d3f:DefensiveTechnique', item['rdfs:subClassOf']):
|
|
phases_ids.append(item['@id'])
|
|
parent = id_to_label(item['d3f:enables']['@id'])
|
|
tactics[parent]['phases'].append(item['rdfs:label'].replace(' ', '-'))
|
|
# print(f"Tactic: {parent} \tPhase: {item['rdfs:label']}")
|
|
|
|
# sort the tactics based on the order
|
|
tactics = dict(sorted(tactics.items(), key=lambda item: item[1]['order']))
|
|
# sort the values
|
|
kill_chain_tactics = {}
|
|
for tactic, value in tactics.items():
|
|
kill_chain_tactics[tactic] = sorted(value['phases'])
|
|
|
|
|
|
# extract all parent, child and ... techniques
|
|
seen_new = True
|
|
while seen_new:
|
|
seen_new = False
|
|
for item in d3fend_json['@graph']:
|
|
if 'rdfs:subClassOf' in item:
|
|
element = item['rdfs:subClassOf']
|
|
if is_element_in_list(element, phases_ids) or is_element_in_list(element, techniques_ids):
|
|
if item['@id'] in techniques_ids:
|
|
continue
|
|
seen_new = True
|
|
techniques_ids.append(item['@id'])
|
|
if 'Memory Boundary Tracking' in item['rdfs:label']:
|
|
print(f"Technique: {item['rdfs:label']}")
|
|
kill_chain = find_kill_chain_of(item)
|
|
technique = {
|
|
'value': item['rdfs:label'],
|
|
'description': item['d3f:definition'],
|
|
'uuid': str(uuid.uuid5(uuid.UUID(uuid_seed), item['d3f:d3fend-id'])),
|
|
'meta': {
|
|
'kill_chain': [kill_chain],
|
|
'refs': [f"https://d3fend.mitre.org/technique/{item['@id']}"],
|
|
'external_id': item['d3f:d3fend-id']
|
|
}
|
|
}
|
|
# synonyms
|
|
if 'd3f:synonym' in item:
|
|
technique['meta']['synonyms'] = get_as_list(item['d3f:synonym'])
|
|
# relations
|
|
if item['rdfs:label'] in relations:
|
|
technique['related'] = relations[item['rdfs:label']]
|
|
|
|
techniques.append(technique)
|
|
print(f"Technique: {item['rdfs:label']} - {item['d3f:d3fend-id']}")
|
|
|
|
|
|
galaxy_fname = 'mitre-d3fend.json'
|
|
galaxy_type = "mitre-d3fend"
|
|
galaxy_name = "MITRE D3FEND"
|
|
galaxy_description = 'A knowledge graph of cybersecurity countermeasures.'
|
|
galaxy_source = 'https://d3fend.mitre.org/'
|
|
json_galaxy = {
|
|
'description': galaxy_description,
|
|
'icon': "user-shield",
|
|
'kill_chain_order': kill_chain_tactics,
|
|
'name': galaxy_name,
|
|
'namespace': "mitre",
|
|
'type': galaxy_type,
|
|
'uuid': "77d1bbfa-2982-4e0a-9238-1dae4a48c5b4",
|
|
'version': 1
|
|
}
|
|
|
|
json_cluster = {
|
|
'authors': ["MITRE"],
|
|
'category': 'd3fend',
|
|
'name': galaxy_name,
|
|
'description': galaxy_description,
|
|
'source': galaxy_source,
|
|
'type': galaxy_type,
|
|
'uuid': "b8bd7e45-63bf-4c44-8ab1-c81c82547380",
|
|
'values': list(techniques),
|
|
'version': 1
|
|
}
|
|
|
|
|
|
# save the Galaxy and Cluster file
|
|
with open(os.path.join('..', 'galaxies', galaxy_fname), 'w') as f:
|
|
# do not sort_keys as it would break the kill_chain_order
|
|
json.dump(json_galaxy, f, indent=2, ensure_ascii=False)
|
|
f.write('\n') # only needed for the beauty and to be compliant with jq_all_the_things
|
|
|
|
with open(os.path.join('..', 'clusters', galaxy_fname), 'w') as f:
|
|
json.dump(json_cluster, f, indent=2, sort_keys=True, ensure_ascii=False)
|
|
f.write('\n') # only needed for the beauty and to be compliant with jq_all_the_things
|
|
|
|
print("All done, please don't forget to ./jq_all_the_things.sh, commit, and then ./validate_all.sh.")
|