DeTTECT/group_mapping.py

619 lines
29 KiB
Python

import simplejson
from generic import *
from eql_yaml import techniques_search
CG_GROUPS = {}
def _is_in_group(json_groups, argument_groups):
"""
Check if the two dicts (json_groups and argument_groups) have any groups in common based on their names/aliases.
:param json_groups: group aliases from ATT&CK
:param argument_groups: group names provided via the command line by the user
:return: true or false
"""
json_groups = list(map(lambda x: x.lower(), json_groups))
for group in argument_groups:
if group in json_groups:
return True
return False
def _are_groups_found(groups_found, argument_groups):
"""
Check if the groups that are provided using '-g/--groups'/'-o/--overlay' are present within MITRE ATT&CK.
:param groups_attack_subset: groups that are found in the ATT&CK data
:param argument_groups: groups provided via the command line by the user
:return: returns boolean that indicates if all of the groups are found
"""
group_attack_data = load_attack_data(DATA_TYPE_STIX_ALL_GROUPS)
group_found = True
for group_arg in argument_groups:
if group_arg == 'all': # this one will be ignored as it does not make any sense for this function
return True
group_id = None
for group in group_attack_data: # is the group provided via the command line known in ATT&CK?
if 'aliases' in group:
group_aliases_lower = list(map(lambda x: x.lower(), group['aliases']))
if group_arg in group_aliases_lower or group_arg == get_attack_id(group).lower():
group_id = get_attack_id(group)
if not group_id: # the group that has been provided through the command line cannot be found in ATT&CK
print('[!] Unknown ATT&CK group: ' + group_arg)
group_found = False
elif group_id not in groups_found: # group not present in filtered (platform) data set
print('[!] Group not part of the data set: ' + group_arg)
group_found = False
return group_found
def _get_software_techniques(groups, platform):
"""
Get all techniques (in a dict) from the provided list of groups in relation to the software these groups use,
and hence techniques they support.
:param groups: ATT&CK groups
:param platform: one or multiple values from PLATFORMS constant
:return: dictionary with info on groups
"""
# { group_id: {group_name: NAME, techniques: set{id, ...} } }
groups_dict = {}
tech_by_software = load_attack_data(DATA_TYPE_CUSTOM_TECH_BY_SOFTWARE)
# { software_id: [technique, ...] }
software_dict = {}
for tech in tech_by_software:
if tech['software_id'] not in software_dict:
# noinspection PySetFunctionToLiteral
software_dict[tech['software_id']] = set([tech['technique_id']])
else:
software_dict[tech['software_id']].add(tech['technique_id'])
# groups is a YAML file
if os.path.isfile(str(groups)):
_yaml = init_yaml()
with open(groups, 'r') as yaml_file:
config = _yaml.load(yaml_file)
for group in config['groups']:
if group['enabled']:
campaign = group.get('campaign', None)
campaign = str(campaign) if campaign else ''
group_id = _generate_group_id(str(group['group_name']), campaign)
groups_dict[group_id] = dict()
groups_dict[group_id]['group_name'] = str(group['group_name'])
groups_dict[group_id]['techniques'] = set()
if campaign != '':
groups_dict[group_id]['campaign'] = str(campaign)
groups_dict[group_id]['software'] = group.get('software_id', None)
if 'software_id' in group and group['software_id']:
for soft_id in group['software_id']:
try:
groups_dict[group_id]['techniques'].update(software_dict[soft_id])
except KeyError:
print('[!] unknown ATT&CK software ID: ' + soft_id)
# groups are provided as arguments via the command line
else:
software_by_group = load_attack_data(DATA_TYPE_CUSTOM_SOFTWARE_BY_GROUP)
for s in software_by_group:
# software matches the ATT&CK Matrix and platform
# and the group is a group we are interested in
if s['x_mitre_platforms']: # there is software that do not have a platform, skip those
if s['matrix'] == 'mitre-attack' and len(set(s['x_mitre_platforms']).intersection(set(platform))) > 0 and \
(groups[0] == 'all' or s['group_id'].lower() in groups or _is_in_group(s['aliases'], groups)):
if s['group_id'] not in groups_dict:
groups_dict[s['group_id']] = {'group_name': s['name']}
groups_dict[s['group_id']]['techniques'] = set()
groups_dict[s['group_id']]['techniques'].update(software_dict[s['software_id']])
return groups_dict
def _generate_group_id(group_name, campaign):
# CG_GROUPS = { group_name+campaign: id } }
"""
Generate a custom group id.
:param group_name: group name as used within the YAML file
:param campaign: campaign as used within the YAML file
:return: custom group identifier string (e.g. CG0001)
"""
global CG_GROUPS
if not CG_GROUPS:
new_id = 1
elif group_name + campaign not in CG_GROUPS:
new_id = len(CG_GROUPS) + 1
if group_name + campaign not in CG_GROUPS:
length = len(str(new_id))
if length > 9:
cg_id = 'CG00' + str(new_id)
elif length > 99:
cg_id = 'CG0' + str(new_id)
elif length > 999:
cg_id = 'CG' + str(new_id)
else:
cg_id = 'CG000' + str(new_id)
CG_GROUPS[group_name + campaign] = cg_id
return CG_GROUPS[group_name + campaign]
def _get_group_techniques(groups, platform, file_type):
"""
Get all techniques (in a dict) from the provided list of groups
:param groups: group ID, group name/alias or a YAML file with group(s) data
:param platform: one or multiple values from PLATFORMS constant
:param file_type: the file type of the YAML file as present in the key 'file_type'
:return: returns dictionary with all techniques from the provided list of groups or -1 when group is not found
"""
# { group_id: {group_name: NAME, techniques: set{id, ...} } }
groups_dict = {}
groups_found = set()
# groups is a YAML file
if file_type == FILE_TYPE_GROUP_ADMINISTRATION:
_yaml = init_yaml()
with open(groups, 'r') as yaml_file:
config = _yaml.load(yaml_file)
for group in config['groups']:
if group['enabled']:
campaign = group.get('campaign', None)
campaign = str(campaign) if campaign else ''
group_id = _generate_group_id(str(group['group_name']), campaign)
groups_dict[group_id] = dict()
groups_dict[group_id]['group_name'] = str(group['group_name'])
if isinstance(group['technique_id'], list):
groups_dict[group_id]['techniques'] = set(group['technique_id'])
groups_dict[group_id]['weight'] = dict((i, 1) for i in group['technique_id'])
elif isinstance(group['technique_id'], dict):
groups_dict[group_id]['techniques'] = set(group['technique_id'].keys())
groups_dict[group_id]['weight'] = group['technique_id']
if campaign != '':
groups_dict[group_id]['campaign'] = str(campaign)
groups_dict[group_id]['software'] = group.get('software_id', None)
else:
# groups are provided as arguments via the command line
all_groups_tech = load_attack_data(DATA_TYPE_CUSTOM_TECH_BY_GROUP)
for gr in all_groups_tech:
platforms = gr['x_mitre_platforms']
if not platforms:
# we just set this to an random legit value, because for pre-attack 'platform' is not used
platforms = ['Windows']
# group matches the: matrix/stage, platform and the group(s) we are interested in
if gr['matrix'] == 'mitre-attack' and len(set(platforms).intersection(set(platform))) > 0 and \
(groups[0] == 'all' or gr['group_id'].lower() in groups or _is_in_group(gr['aliases'], groups)):
if gr['group_id'] not in groups_dict:
groups_found.add(gr['group_id'])
groups_dict[gr['group_id']] = {'group_name': gr['name']}
groups_dict[gr['group_id']]['techniques'] = set()
groups_dict[gr['group_id']]['weight'] = dict()
groups_dict[gr['group_id']]['techniques'].add(gr['technique_id'])
groups_dict[gr['group_id']]['weight'][gr['technique_id']] = 1
# do not call '_are_groups_found' when groups is a YAML file
# (this could contain groups that do not exists within ATT&CK)
if not os.path.isfile(str(groups)):
found = _are_groups_found(groups_found, groups)
if not found:
return -1
return groups_dict
def _get_detection_techniques(filename):
"""
Get all techniques (in a dict) from the detection administration
:param filename: path to the YAML technique administration file
:return: groups dictionary, loaded techniques from administration YAML file
"""
# { group_id: {group_name: NAME, techniques: set{id, ...} } }
groups_dict = {}
detection_techniques, name, platform = load_techniques(filename)
group_id = 'DETECTION'
groups_dict[group_id] = {}
groups_dict[group_id]['group_name'] = 'Detection'
groups_dict[group_id]['techniques'] = set()
groups_dict[group_id]['weight'] = dict()
for t, v in detection_techniques.items():
s = calculate_score(v['detection'], zero_value=-1)
if s >= 0:
groups_dict[group_id]['techniques'].add(t)
groups_dict[group_id]['weight'][t] = 1
return groups_dict, detection_techniques
def _get_visibility_techniques(filename):
"""
Get all techniques (in a dict) from the technique administration
:param filename: path to the YAML technique administration file
:return: dictionary
"""
# { group_id: {group_name: NAME, techniques: set{id, ...} } }
groups_dict = {}
visibility_techniques, name, platform = load_techniques(filename)
group_id = 'VISIBILITY'
groups_dict[group_id] = {}
groups_dict[group_id]['group_name'] = 'Visibility'
groups_dict[group_id]['techniques'] = set()
groups_dict[group_id]['weight'] = dict()
for t, v in visibility_techniques.items():
s = calculate_score(v['visibility'])
if s > 0:
groups_dict[group_id]['techniques'].add(t)
groups_dict[group_id]['weight'][t] = 1
return groups_dict, visibility_techniques
def _get_technique_count(groups, groups_overlay, groups_software, overlay_type, all_techniques):
"""
Create a dict with all involved techniques and their relevant count/score
:param groups: a dict with data on groups
:param groups_overlay: a dict with data on the groups to overlay
:param groups_software: a dict with with data on which techniques are used within related software
:param overlay_type: group, visibility or detection
:param all_techniques: dict containing all technique data for visibility or detection
:return: dictionary, max_count
"""
# { technique_id: {count: ..., groups: set{} }
techniques_dict = {}
for group, v in groups.items():
for tech in v['techniques']:
if tech not in techniques_dict:
techniques_dict[tech] = dict()
techniques_dict[tech]['groups'] = set()
techniques_dict[tech]['count'] = v['weight'][tech]
# We only want to increase the score when comparing groups and not for visibility or detection.
# This allows to have proper sorting of the heat map, which in turn improves the ability to visually
# compare this heat map with the detection/visibility ATT&CK Navigator layers.
else:
techniques_dict[tech]['count'] += v['weight'][tech]
techniques_dict[tech]['groups'].add(group)
max_count = max(techniques_dict.values(), key=lambda k: k['count'])['count']
# create dict {tech_id: score+max_tech_count} to be used for when doing an overlay of the type visibility or detection
if overlay_type != OVERLAY_TYPE_GROUP:
dict_tech_score = {}
list_tech = groups_overlay[overlay_type.upper()]['techniques']
for tech in list_tech:
if overlay_type == OVERLAY_TYPE_VISIBILITY:
dict_tech_score[tech] = calculate_score(all_techniques[tech]['visibility']) + max_count
elif overlay_type == OVERLAY_TYPE_DETECTION:
dict_tech_score[tech] = calculate_score(all_techniques[tech]['detection'], zero_value=-1) + max_count
for group, v in groups_overlay.items():
for tech in v['techniques']:
if tech not in techniques_dict:
techniques_dict[tech] = dict()
techniques_dict[tech]['groups'] = set()
if overlay_type == OVERLAY_TYPE_GROUP:
techniques_dict[tech]['count'] = v['weight'][tech]
else:
techniques_dict[tech]['count'] = dict_tech_score[tech]
elif group in groups:
if tech not in groups[group]['techniques']:
if overlay_type == OVERLAY_TYPE_GROUP:
techniques_dict[tech]['count'] += v['weight'][tech]
else:
techniques_dict[tech]['count'] = dict_tech_score[tech]
# Only do this when it was not already counted by being part of 'groups'.
# Meaning the group in 'groups_overlay' was also part of 'groups' (match on Group ID) and the
# technique was already counted for that group / it is not a new technique for that group coming
# from a YAML file
else:
if overlay_type == OVERLAY_TYPE_GROUP:
# increase count when the group in the YAML file is a custom group
techniques_dict[tech]['count'] += v['weight'][tech]
else:
techniques_dict[tech]['count'] = dict_tech_score[tech]
techniques_dict[tech]['groups'].add(group)
for group, v in groups_software.items():
for tech in v['techniques']:
if tech not in techniques_dict:
techniques_dict[tech] = dict()
techniques_dict[tech]['count'] = 0
# we will not adjust the scoring for groups_software. We will just set the the score to 0.
# This will later be used for the colouring of the heat map.
if 'groups' not in techniques_dict[tech]:
techniques_dict[tech]['groups'] = set()
techniques_dict[tech]['groups'].add(group)
return techniques_dict, max_count
def _get_technique_layer(techniques_count, groups, overlay, groups_software, overlay_file_type, overlay_type,
all_techniques):
"""
Create the technique layer that will be part of the ATT&CK navigator json file
:param techniques_count: involved techniques with count (to be used within the scores)
:param groups: a dict with data on groups
:param overlay: a dict with data on the groups to overlay
:param groups_software: a dict with with data on which techniques are used within related software
:param overlay_file_type: the file type of the YAML file as present in the key 'file_type'
:param overlay_type: group, visibility or detection
:param all_techniques: dictionary with all techniques loaded from techniques administration YAML file
:return: dictionary
"""
techniques_layer = []
# { technique_id: {count: ..., groups: set{} }
# add the technique count/scoring
for tech, v in techniques_count.items():
t = dict()
t['techniqueID'] = tech
t['score'] = v['count']
t['metadata'] = []
metadata_dict = dict()
for group, values in groups.items():
if tech in values['techniques']: # we do not color this one because that's done using the scoring
if 'Group' not in metadata_dict:
metadata_dict['Group'] = set()
metadata_dict['Group'].add(values['group_name'])
# this will only be effective when loading a YAML files that have a value for the key 'campaign'
if 'campaign' in values:
if 'Campaign' not in metadata_dict:
metadata_dict['Campaign'] = set()
metadata_dict['Campaign'].add(values['campaign'])
# change the color and add metadata to make the groups overlay visible
for group, values in overlay.items():
if tech in values['techniques']:
# Determine color:
if len(v['groups'].intersection(set(groups.keys()))) > 0:
# if the technique is both present in the group (-g/--groups) and the groups overlay (-o/--overlay)
metadata_dict['Group'].add(values['group_name'])
# determine the color of the overlay:
# - using groups, it's normal orange
# - using detections, it's 6 variations or orange (score 0 to 5)
# - using visibility, it's 4 variations of orange (score 1 to 4)
if overlay_file_type == FILE_TYPE_TECHNIQUE_ADMINISTRATION:
if overlay_type == OVERLAY_TYPE_VISIBILITY:
s = calculate_score(all_techniques[tech]['visibility'])
t['color'] = COLOR_O_1 if s == 1 else COLOR_O_2 if s == 2 else COLOR_O_3 if s == 3 else COLOR_O_4 if s == 4 else ''
elif overlay_type == OVERLAY_TYPE_DETECTION:
s = calculate_score(all_techniques[tech]['detection'], zero_value=-1)
t['color'] = COLOR_O_0 if s == 0 else COLOR_O_1 if s == 1 else COLOR_O_2 if s == 2 else COLOR_O_3 if s == 3 else COLOR_O_4 if s == 4 else COLOR_O_5 if s == 5 else ''
else:
t['color'] = COLOR_GROUP_OVERLAY_MATCH
else:
# the technique is only present in the overlay and not in the provided groups (-g/--groups)
if overlay_file_type == FILE_TYPE_TECHNIQUE_ADMINISTRATION:
if overlay_type == OVERLAY_TYPE_VISIBILITY:
s = calculate_score(all_techniques[tech]['visibility'])
t['color'] = COLOR_V_1 if s == 1 else COLOR_V_2 if s == 2 else COLOR_V_3 if s == 3 else COLOR_V_4 if s == 4 else ''
elif overlay_type == OVERLAY_TYPE_DETECTION:
s = calculate_score(all_techniques[tech]['detection'], zero_value=-1)
t['color'] = COLOR_D_0 if s == 0 else COLOR_D_1 if s == 1 else COLOR_D_2 if s == 2 else COLOR_D_3 if s == 3 else COLOR_D_4 if s == 4 else COLOR_D_5 if s == 5 else ''
else:
t['color'] = COLOR_GROUP_OVERLAY_NO_MATCH
if 'Group' not in metadata_dict:
metadata_dict['Group'] = set()
metadata_dict['Group'].add(values['group_name'])
# Add applicable_to to metadata in case of overlay for detection/visibility:
if overlay_file_type == FILE_TYPE_TECHNIQUE_ADMINISTRATION:
t['metadata'].append({'name': 'Overlay', 'value': overlay_type})
for obj_type in ['detection', 'visibility']:
t['metadata'] = add_metadata_technique_object(all_techniques[tech], obj_type, t['metadata'])
# change the color and add metadata to make the groups software overlay visible
for group, values in groups_software.items():
if tech in values['techniques']:
if t['score'] > 0:
t['color'] = COLOR_GROUP_AND_SOFTWARE
else:
t['color'] = COLOR_SOFTWARE
if 'Software groups' not in metadata_dict:
metadata_dict['Software groups'] = set()
metadata_dict['Software groups'].add(values['group_name'])
if 'campaign' in values:
if 'Software campaign' not in metadata_dict:
metadata_dict['Software campaign'] = set()
metadata_dict['Software campaign'].add(values['campaign'])
# create the metadata based on the dict 'metadata_dict'
i = 0
for metadata, values in metadata_dict.items():
tmp_dict = {'name': metadata, 'value': ', '.join(values)}
t['metadata'].insert(i, tmp_dict)
i += 1
t['metadata'] = make_layer_metadata_compliant(t['metadata'])
techniques_layer.append(t)
determine_and_set_show_sub_techniques(techniques_layer)
return techniques_layer
def _get_group_list(groups, file_type):
"""
Make a list of group names for the involved groups.
:param groups: a dict with data on groups
:param file_type: the file type of the YAML file as present in the key 'file_type'
:return: list
"""
if file_type == FILE_TYPE_GROUP_ADMINISTRATION:
groups_list = []
for group, values in groups.items():
if 'campaign' in values and values['campaign'] != '':
groups_list.append(values['group_name'] + ' (' + values['campaign'] + ')')
else:
groups_list.append(values['group_name'])
return groups_list
else:
return groups
def generate_group_heat_map(groups, overlay, overlay_type, platform, software_groups, search_visibility,
search_detection, health_is_called, output_filename, layer_name, include_all_score_objs=False):
"""
Calls all functions that are necessary for the generation of the heat map and write a json layer to disk.
:param groups: threat actor groups
:param overlay: group(s), visibility or detections to overlay (group ID, group name/alias, YAML file with
group(s), detections or visibility)
:param overlay_type: group, visibility or detection
:param platform: one or multiple the values from PLATFORMS constant or None (default = Windows)
:param software_groups: specify if techniques from related software should be included
:param search_visibility: visibility EQL search query
:param search_detection: detection EQL search query
:param health_is_called: boolean that specifies if detailed errors in the file will be printed
:param output_filename: output filename defined by the user
:param layer_name: the name of the Navigator layer
:param include_all_score_objs: include all score objects within the score_logbook for the EQL query
:return: returns None when something went wrong
"""
overlay_dict = {}
groups_software_dict = {}
groups_file_type = None
if groups == None:
groups = ['all']
elif os.path.isfile(groups[0]):
groups = groups[0]
groups_file_type = check_file(groups, file_type=FILE_TYPE_GROUP_ADMINISTRATION,
health_is_called=health_is_called)
if not groups_file_type:
return None # the groups_file_type is not of the type FILE_TYPE_GROUP_ADMINISTRATION
elif isinstance(groups[0], str) and len(groups) == 1:
# reached when the groups are provided via the interactive menu, or when the CLI only contained one argument
groups = groups[0]
groups = groups.split(',')
groups = list(map(lambda x: x.strip().lower(), groups))
else: # reached when the groups are provided via CLI arguments
groups = list(map(lambda x: x.strip().lower(), groups))
# set the correct value for platform
platform_yaml = None
if groups_file_type == FILE_TYPE_GROUP_ADMINISTRATION:
_yaml = init_yaml()
with open(groups, 'r') as yaml_file:
group_file = _yaml.load(yaml_file)
platform_yaml = get_platform_from_yaml(group_file)
if platform == None and platform_yaml != None:
platform = platform_yaml
elif platform == None:
platform = ['Windows']
elif 'all' in platform:
platform = list(PLATFORMS.values())
overlay_file_type = None
if overlay:
if os.path.isfile(overlay[0]):
overlay = overlay[0]
expected_file_type = FILE_TYPE_GROUP_ADMINISTRATION if overlay_type == OVERLAY_TYPE_GROUP \
else FILE_TYPE_TECHNIQUE_ADMINISTRATION \
if overlay_type in [OVERLAY_TYPE_VISIBILITY, OVERLAY_TYPE_DETECTION] else None
overlay_file_type = check_file(overlay, expected_file_type, health_is_called=health_is_called)
if not overlay_file_type:
return None # the overlay_file_type is not of the expected type
elif isinstance(overlay, str):
# reached when the overlay is provided via the interactive menu
overlay = overlay.split(',')
overlay = list(map(lambda x: x.strip().lower(), overlay))
else: # reached when the groups are provided via CLI arguments
overlay = list(map(lambda x: x.strip().lower(), overlay))
else:
overlay = []
# load the techniques (visibility or detection) from the YAML file
all_techniques = None
if overlay_file_type == FILE_TYPE_TECHNIQUE_ADMINISTRATION:
# filter out visibility and/or detection objects using EQL
if search_detection or search_visibility:
overlay = techniques_search(overlay, search_visibility, search_detection,
include_all_score_objs=include_all_score_objs)
if not overlay:
return None # something went wrong in executing the search or 0 results where returned
if overlay_type == OVERLAY_TYPE_VISIBILITY:
overlay_dict, all_techniques = _get_visibility_techniques(overlay)
elif overlay_type == OVERLAY_TYPE_DETECTION:
overlay_dict, all_techniques = _get_detection_techniques(overlay)
# we are not overlaying visibility or detection, overlay group will therefore contain information on another group
elif len(overlay) > 0:
overlay_dict = _get_group_techniques(overlay, platform, overlay_file_type)
if overlay_dict == -1:
return None # returns None when the provided Group(s) to be overlaid, contains Groups not part of ATT&CK
groups_dict = _get_group_techniques(groups, platform, groups_file_type)
if groups_dict == -1:
return None # returns None when the provided Group contains Groups not part of ATT&CK
if len(groups_dict) == 0:
print('[!] Empty layer.') # the provided groups dit not result in any techniques
return None
# check if we are doing a software group overlay
if software_groups and overlay:
if overlay_type not in [OVERLAY_TYPE_VISIBILITY, OVERLAY_TYPE_DETECTION]:
# if a group overlay is provided, get the software techniques for the overlay
groups_software_dict = _get_software_techniques(overlay, platform)
elif software_groups:
groups_software_dict = _get_software_techniques(groups, platform)
technique_count, max_count = _get_technique_count(groups_dict, overlay_dict, groups_software_dict, overlay_type, all_techniques)
technique_layer = _get_technique_layer(technique_count, groups_dict, overlay_dict, groups_software_dict,
overlay_file_type, overlay_type, all_techniques)
# make a list group names for the involved groups.
if groups == ['all']:
groups_list = ['all']
else:
groups_list = _get_group_list(groups_dict, groups_file_type)
overlay_list = _get_group_list(overlay_dict, overlay_file_type)
desc = 'stage: attack | platform(s): ' + platform_to_name(platform, separator=', ') + ' | group(s): ' \
+ ', '.join(groups_list) + ' | overlay group(s): ' + ', '.join(overlay_list)
if not layer_name:
layer_name = 'Attack - ' + platform_to_name(platform, separator=', ')
layer = get_layer_template_groups(layer_name, max_count, desc, platform, overlay_type)
layer['techniques'] = technique_layer
json_string = simplejson.dumps(layer).replace('}, ', '},\n')
if not output_filename:
if overlay:
filename = platform_to_name(platform) + '_' + '_'.join(groups_list) + '-overlay_' + '_'.join(overlay_list)
else:
filename = platform_to_name(platform) + '_' + '_'.join(groups_list)
filename = create_output_filename('attack', filename)
write_file(filename, json_string)
else:
write_file(output_filename, json_string)