Initial version of the OpenIOC loader

pymisp/mispevent.py

@@ -234,6 +234,19 @@ class MISPEvent(object):
         self._reinitialize_event()
         self.set_all_values(**e)
 
+    def set_date(self, date, ignore_invalid=False):
+        if isinstance(date, basestring) or isinstance(date, unicode):
+            self.date = parse(date).date()
+        elif isinstance(date, datetime.datetime):
+            self.date = date.date()
+        elif isinstance(date, datetime.date):
+            self.date = date
+        else:
+            if ignore_invalid:
+                self.date = datetime.date.today()
+            else:
+                raise NewEventError('Invalid format for the date: {} - {}'.format(date, type(date)))
+
     def set_all_values(self, **kwargs):
         # Required value
         if kwargs.get('info'):
@@ -257,14 +270,7 @@ class MISPEvent(object):
         if kwargs.get('published') is not None:
             self.publish()
         if kwargs.get('date'):
-            if isinstance(kwargs['date'], basestring) or isinstance(kwargs['date'], unicode):
-                self.date = parse(kwargs['date']).date()
-            elif isinstance(kwargs['date'], datetime.datetime):
-                self.date = kwargs['date'].date()
-            elif isinstance(kwargs['date'], datetime.date):
-                self.date = kwargs['date']
-            else:
-                raise NewEventError('Invalid format for the date: {} - {}'.format(kwargs['date'], type(kwargs['date'])))
+            self.set_date(kwargs['date'])
         if kwargs.get('Attribute'):
             for a in kwargs['Attribute']:
                 attribute = MISPAttribute(self.describe_types)

pymisp/tools/openioc.py

@@ -0,0 +1,118 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from pymisp import MISPEvent
+try:
+    from bs4 import BeautifulSoup
+    has_bs4 = True
+except ImportError:
+    has_bs4 = False
+
+
+iocMispMapping = {
+    'DriverItem/DriverName': {'category': 'Artifacts dropped', 'type': 'other', 'comment': 'DriverName.'},
+
+    'DnsEntryItem/Host': {'type': 'domain'},
+
+    'Email/To': {'type': 'target-email'},
+    'Email/Date': {'type': 'comment', 'comment': 'EmailDate.'},
+    'Email/Body': {'type': 'email-subject'},
+    'Email/From': {'type': 'email-dst'},
+    'Email/Subject': {'type': 'email-subject'},
+    'Email/Attachment/Name': {'type': 'email-attachment'},
+
+    'FileItem/Md5sum': {'type': 'md5'},
+    'FileItem/Sha1sum': {'type': 'sha1'},
+    'FileItem/Sha256sum': {'type': 'sha256'},
+    'FileItem/FileName': {'type': 'filename'},
+    'FileItem/FullPath': {'type': 'filename'},
+    'FileItem/FilePath': {'type': 'filename'},
+
+    'Network/URI': {'type': 'uri'},
+    'Network/DNS': {'type': 'domain'},
+    'Network/String': {'type': 'ip-dst'},
+    'Network/UserAgent': {'type': 'user-agent'},
+
+    'PortItem/localIP': {'type': 'ip-dst'},
+
+    'ProcessItem/name': {'type': 'pattern-in-memory', 'comment': 'ProcessName.'},
+    'ProcessItem/path': {'type': 'pattern-in-memory', 'comment': 'ProcessPath.'},
+    'ProcessItem/Mutex': {'type': 'mutex'},
+    'ProcessItem/Pipe/Name': {'type': 'named pipe'},
+    'ProcessItem/Mutex/Name': {'type': 'mutex', 'comment': 'MutexName.'},
+
+    # Is it the regkey value?
+    # 'RegistryItem/Text': {'type': 'regkey', 'RegistryText. '},
+    'RegistryItem/Path': {'type': 'regkey'},
+
+    'ServiceItem/name': {'type': 'windows-service-name'},
+    'ServiceItem/type': {'type': 'pattern-in-memory', 'comment': 'ServiceType. '},
+
+    'Snort/Snort': {'type': 'snort'},
+}
+
+
+def extract_field(report, field_name):
+    data = report.find(field_name.lower())
+    if data and hasattr(data, 'text'):
+        return data.text
+    return None
+
+
+def load_openioc(openioc):
+    if not has_bs4:
+        raise Exception('You need to install BeautifulSoup: pip install bs4')
+    misp_event = MISPEvent()
+    with open(openioc, "r") as ioc_file:
+        iocreport = BeautifulSoup(ioc_file, "lxml")
+        # Set event fields
+        info = extract_field(iocreport, 'short_description')
+        if info:
+            misp_event.info = info
+        date = extract_field(iocreport, 'authored_date')
+        if date:
+            misp_event.set_date(date)
+        # Set special attributes
+        description = extract_field(iocreport, 'description')
+        if description:
+            misp_event.add_attribute('comment', description)
+        author = extract_field(iocreport, 'authored_by')
+        if author:
+            misp_event.add_attribute('comment', author)
+        misp_event = set_all_attributes(iocreport, misp_event)
+    return misp_event
+
+
+def get_mapping(openioc_type):
+    t = openioc_type.lower()
+    for k, v in iocMispMapping.items():
+        if k.lower() == t:
+            return v
+    return False
+
+
+def set_all_attributes(openioc, misp_event):
+    for item in openioc.find_all("indicatoritem"):
+        print(item)
+        attribute_values = {'comment': ''}
+        if item.find('context'):
+            mapping = get_mapping(item.find('context')['search'])
+            if mapping:
+                attribute_values.update(mapping)
+            else:
+                # Unknown mapping, ignoring
+                # print(item.find('context'))
+                continue
+        else:
+            continue
+        value = extract_field(openioc, 'Content')
+        if value:
+            attribute_values['value'] = value
+        else:
+            # No value, ignoring
+            continue
+        comment = extract_field(openioc, 'Comment')
+        if comment:
+            attribute_values["comment"] = '{} {}'.format(attribute_values["comment"], comment)
+        misp_event.add_attribute(**attribute_values)
+    return misp_event