ail-framework/bin/export/MispImport.py

#!/usr/bin/env python3
# -*-coding:UTF-8 -*

import os
import sys
import uuid
import redis

from hashlib import sha1, sha256

sys.path.append(os.path.join(os.environ['AIL_BIN'], 'lib'))
sys.path.append(os.path.join(os.environ['AIL_BIN'], 'packages'))
import Item
import Cryptocurrency
import Pgp
import Decoded
import Domain
import Screenshot
import Correlate_object

import AILObjects

# MISP
from pymisp import MISPEvent, MISPObject, PyMISP

# # TODO: deplace me in another fil
def get_global_id(obj_type, obj_id, obj_subtype=None):
    if obj_subtype:
        return '{}:{}:{}'.format(obj_type, obj_subtype, obj_id)
    else:
        return '{}:{}'.format(obj_type, obj_id)

# sub type
# obj type
# obj value
def get_global_id_from_id(global_id):
    obj_meta = {}
    global_id = global_id.split(':', 3)
    if len(global_id) > 2:
        obj_meta['type'] = global_id[0]
        obj_meta['subtype'] = global_id[1]
        obj_meta['id'] = global_id[2]
    else:
        obj_meta['type'] = global_id[0]
        obj_meta['subtype'] = None
        obj_meta['id'] = global_id[1]
    return obj_meta

def get_import_dir():
    return os.path.join(os.environ['AIL_HOME'], 'temp/import')

def sanitize_import_file_path(filename):
    IMPORT_FOLDER = get_import_dir()
    filename = os.path.join(IMPORT_FOLDER, filename)
    filename = os.path.realpath(filename)
    # path traversal
    if not os.path.commonprefix([filename, IMPORT_FOLDER]) == IMPORT_FOLDER:
        return os.path.join(IMPORT_FOLDER, str(uuid.uuid4()) + '.json')
    # check if file already exist
    if os.path.isfile(filename):
        return os.path.join(IMPORT_FOLDER, str(uuid.uuid4()) + '.json')
    return filename

def get_misp_obj_tag(misp_obj):
    if misp_obj.attributes:
        misp_tags = misp_obj.attributes[0].tags
        tags = []
        for misp_tag in misp_tags:
            tags.append(misp_tag.name)
        return tags
    else:
        return []

def get_object_metadata(misp_obj):
    obj_meta = {}
    if 'first_seen' in misp_obj.keys():
        obj_meta['first_seen'] = misp_obj.first_seen
    if 'last_seen' in misp_obj.keys():
        obj_meta['last_seen'] = misp_obj.last_seen
    obj_meta['tags'] = get_misp_obj_tag(misp_obj)
    return obj_meta

def unpack_item_obj(map_uuid_global_id, misp_obj):
    obj_meta = get_object_metadata(misp_obj)
    obj_id = None
    io_content = None

    for attribute in misp_obj.attributes:
        if attribute.object_relation == 'raw-data':
            obj_id = attribute.value               # # TODO: sanitize
            io_content = attribute.data             # # TODO: check if type == io

    if obj_id and io_content:
        res = Item.create_item(obj_id, obj_meta, io_content)

        map_uuid_global_id[misp_obj.uuid] = get_global_id('item', obj_id)



## TODO: handle multiple pgp in the same object
def unpack_obj_pgp(map_uuid_global_id, misp_obj):
    # get obj sub type
    obj_attr = misp_obj.attributes[0]
    obj_id = obj_attr.value
    if obj_attr.object_relation == 'key-id':
        obj_subtype = 'key'
    elif obj_attr.object_relation == 'user-id-name':
        obj_subtype = 'name'
    elif obj_attr.object_relation == 'user-id-email':
        obj_subtype = 'mail'

    if obj_id and obj_subtype:
        obj_meta = get_object_metadata(misp_obj)
        res = Pgp.pgp.create_correlation(obj_subtype, obj_id, obj_meta)

        map_uuid_global_id[misp_obj.uuid] = get_global_id('pgp', obj_id, obj_subtype=obj_subtype)


def unpack_obj_cryptocurrency(map_uuid_global_id, misp_obj):
    obj_id = None
    obj_subtype = None
    for attribute in misp_obj.attributes:
        if attribute.object_relation == 'address': # # TODO: handle xmr address field
            obj_id = attribute.value
        elif attribute.object_relation == 'symbol':
            obj_subtype = Cryptocurrency.get_cryptocurrency_type(attribute.value)

    # valid cryptocurrency type
    if obj_subtype and obj_id:
        obj_meta = get_object_metadata(misp_obj)
        res = Cryptocurrency.cryptocurrency.create_correlation(obj_subtype, obj_id, obj_meta)

        map_uuid_global_id[misp_obj.uuid] = get_global_id('cryptocurrency', obj_id, obj_subtype=obj_subtype)

def get_obj_type_from_relationship(misp_obj):
    obj_uuid = misp_obj.uuid
    obj_type = None

    for relation in misp_obj.ObjectReference:
        if relation.object_uuid == obj_uuid:
            if relation.relationship_type == "screenshot-of":
                return 'screenshot'
            if relation.relationship_type == "included-in":
                obj_type = 'decoded'
    return obj_type


# # TODO: covert md5 and sha1 to expected
def unpack_file(map_uuid_global_id, misp_obj):

    obj_type = get_obj_type_from_relationship(misp_obj)
    if obj_type:
        obj_id = None
        io_content = None
        for attribute in misp_obj.attributes:
            # get file content
            if attribute.object_relation == 'attachment':
                io_content = attribute.data
            elif attribute.object_relation == 'malware-sample':
                io_content = attribute.data

            # # TODO: use/verify specified mimetype
            elif attribute.object_relation == 'mimetype':
                #print(attribute.value)
                pass

            # # TODO: support more
            elif attribute.object_relation == 'sha1' and obj_type == 'decoded':
                obj_id = attribute.value
            elif attribute.object_relation == 'sha256' and obj_type == 'screenshot':
                obj_id = attribute.value

        # get SHA1/sha256
        if io_content and not obj_id:
            if obj_type=='screenshot':
                obj_id = sha256(io_content.getvalue()).hexdigest()
            else: # decoded file
                obj_id = sha1(io_content.getvalue()).hexdigest()

        if obj_id and io_content:
            obj_meta = get_object_metadata(misp_obj)
            if obj_type == 'screenshot':
                Screenshot.create_screenshot(obj_id, obj_meta, io_content)
                map_uuid_global_id[misp_obj.uuid] = get_global_id('image', obj_id)
            else: #decoded
                Decoded.create_decoded(obj_id, obj_meta, io_content)
                map_uuid_global_id[misp_obj.uuid] = get_global_id('decoded', obj_id)


def get_misp_import_fct(map_uuid_global_id, misp_obj):
    if misp_obj.name == 'ail-leak':
        unpack_item_obj(map_uuid_global_id, misp_obj)
    elif misp_obj.name == 'domain-ip':
        pass
    elif misp_obj.name == 'pgp-meta':
        unpack_obj_pgp(map_uuid_global_id, misp_obj)
    elif misp_obj.name == 'coin-address':
        unpack_obj_cryptocurrency(map_uuid_global_id, misp_obj)
    elif misp_obj.name == 'file':
        unpack_file(map_uuid_global_id, misp_obj)

# import relationship between objects
def create_obj_relationships(map_uuid_global_id, misp_obj):
    if misp_obj.uuid in map_uuid_global_id:
        for relationship in misp_obj.ObjectReference:
            if relationship.referenced_uuid in map_uuid_global_id:
                obj_meta_src = get_global_id_from_id(map_uuid_global_id[relationship.object_uuid])
                obj_meta_target = get_global_id_from_id(map_uuid_global_id[relationship.referenced_uuid])

                if obj_meta_src == 'decoded' or obj_meta_src == 'item':
                    print('000000')
                    print(obj_meta_src)
                    print(obj_meta_target)
                    print('111111')

                Correlate_object.create_obj_relationship(obj_meta_src['type'], obj_meta_src['id'], obj_meta_target['type'], obj_meta_target['id'],
                                                            obj1_subtype=obj_meta_src['subtype'], obj2_subtype=obj_meta_target['subtype'])

def create_map_all_obj_uuid_golbal_id(map_uuid_global_id):
    for obj_uuid in map_uuid_global_id:
        AILObjects.create_map_obj_uuid_golbal_id(obj_uuid, map_uuid_global_id[obj_uuid])

def import_objs_from_file(filepath):
    map_uuid_global_id = {}

    event_to_import = MISPEvent()
    try:
        event_to_import.load_file(filepath)
    except:
        return map_uuid_global_id

    for misp_obj in event_to_import.objects:
        get_misp_import_fct(map_uuid_global_id, misp_obj)

    for misp_obj in event_to_import.objects:
        create_obj_relationships(map_uuid_global_id, misp_obj)

    create_map_all_obj_uuid_golbal_id(map_uuid_global_id)
    return map_uuid_global_id


if __name__ == '__main__':

    # misp = PyMISP('https://127.0.0.1:8443/', 'uXgcN42b7xuL88XqK5hubwD8Q8596VrrBvkHQzB0', False)

    import_objs_from_file('ail_export_c777a4d1-5f63-4fa2-86c0-07da677bdac2.json')

    #Screenshot.delete_screenshot('a92d459f70c4dea8a14688f585a5e2364be8b91fbf924290ead361d9b909dcf1')
    #Decoded.delete_decoded('d59a110ab233fe87cefaa0cf5603b047b432ee07')
    #Pgp.pgp.delete_correlation('key', '0xA4BB02A75E6AF448')

    #Item.delete_item('submitted/2020/02/10/b2485894-4325-469b-bc8f-6ad1c2dbb202.gz')
    #Item.delete_item('archive/pastebin.com_pro/2020/02/10/K2cerjP4.gz')