From d39fb7da184f2335a2b860b384106c57c6a0bffc Mon Sep 17 00:00:00 2001 From: chrisr3d Date: Mon, 13 May 2019 17:29:07 +0200 Subject: [PATCH] add: Parsing some object references at the end of the process --- misp_modules/modules/import_mod/joe_import.py | 20 +++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/misp_modules/modules/import_mod/joe_import.py b/misp_modules/modules/import_mod/joe_import.py index bc14ba87..e378bc29 100644 --- a/misp_modules/modules/import_mod/joe_import.py +++ b/misp_modules/modules/import_mod/joe_import.py @@ -1,4 +1,5 @@ # -*- coding: utf-8 -*- +from collections import defaultdict from pymisp import MISPEvent, MISPObject import json import base64 @@ -38,11 +39,21 @@ class JoeParser(): def __init__(self, data): self.data = data self.misp_event = MISPEvent() + self.references = defaultdict(list) def parse_joe(self): self.parse_fileinfo() + if self.references: + self.build_references() self.finalize_results() + def build_references(self): + for misp_object in self.misp_event.objects: + object_uuid = misp_object.uuid + if object_uuid in self.references: + for reference in self.references[object_uuid]: + misp_object.add_reference(reference['idref'], reference['relationship']) + def parse_fileinfo(self): fileinfo = self.data['fileinfo'] file_object = MISPObject('file') @@ -54,6 +65,7 @@ class JoeParser(): pe_object = MISPObject('pe') file_object.add_reference(pe_object.uuid, 'included-in') self.misp_event.add_object(**file_object) + self.fileinfo_uuid = file_object.uuid peinfo = fileinfo['pe'] for field, mapping in pe_object_fields.items(): attribute_type, object_relation = mapping @@ -67,10 +79,6 @@ class JoeParser(): pe_object.add_attribute(pe_object_mapping[name], **{'type': 'text', 'value': feature['value']}) sections_number = len(peinfo['sections']['section']) pe_object.add_attribute('number-sections', **{'type': 'counter', 'value': sections_number}) - for section in peinfo['sections']['section']: - section_object = self.parse_pe_section(section) - pe_object.add_reference(section_object.uuid, 'included-in') - self.misp_event.add_object(**section_object) signerinfo_object = MISPObject('authenticode-signerinfo') pe_object.add_reference(signerinfo_object.uuid, 'signed-by') self.misp_event.add_object(**pe_object) @@ -80,6 +88,10 @@ class JoeParser(): attribute_type, object_relation = mapping signerinfo_object.add_attribute(object_relation, **{'type': attribute_type, 'value': signatureinfo[feature]}) self.misp_event.add_object(**signerinfo_object) + for section in peinfo['sections']['section']: + section_object = self.parse_pe_section(section) + self.references[pe_object.uuid].append({'idref': section_object.uuid, 'relationship': 'included-in'}) + self.misp_event.add_object(**section_object) def parse_pe_section(self, section): section_object = MISPObject('pe-section')