{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Mimikatz DC Sync\n",
    "Detects Mimikatz DC sync security events"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Rule Content\n",
    "```\n",
    "- title: Mimikatz DC Sync\n",
    "  id: 611eab06-a145-4dfa-a295-3ccc5c20f59a\n",
    "  description: Detects Mimikatz DC sync security events\n",
    "  status: experimental\n",
    "  date: 2018/06/03\n",
    "  modified: 2019/10/08\n",
    "  author: Benjamin Delpy, Florian Roth\n",
    "  references:\n",
    "  - https://twitter.com/gentilkiwi/status/1003236624925413376\n",
    "  - https://gist.github.com/gentilkiwi/dcc132457408cf11ad2061340dcb53c2\n",
    "  tags:\n",
    "  - attack.credential_access\n",
    "  - attack.s0002\n",
    "  - attack.t1003\n",
    "  logsource:\n",
    "    product: windows\n",
    "    service: security\n",
    "    category: null\n",
    "  detection:\n",
    "    selection:\n",
    "      EventID: 4662\n",
    "      Properties:\n",
    "      - '*Replicating Directory Changes All*'\n",
    "      - '*1131f6ad-9c07-11d1-f79f-00c04fc2dcd2*'\n",
    "    filter1:\n",
    "      SubjectDomainName: Window Manager\n",
    "    filter2:\n",
    "      SubjectUserName:\n",
    "      - NT AUTHORITY*\n",
    "      - '*$'\n",
    "    condition: selection and not filter1 and not filter2\n",
    "  falsepositives:\n",
    "  - Valid DC Sync that is not covered by the filters; please report\n",
    "  level: high\n",
    "\n",
    "```"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Querying Elasticsearch"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Import Libraries"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from elasticsearch import Elasticsearch\n",
    "from elasticsearch_dsl import Search\n",
    "import pandas as pd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Initialize Elasticsearch client"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "es = Elasticsearch(['http://helk-elasticsearch:9200'])\n",
    "searchContext = Search(using=es, index='logs-endpoint-winevent-security-*', doc_type='doc')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Run Elasticsearch Query"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "s = searchContext.query('query_string', query='(((event_id:\"4662\" AND object_properties.keyword:(*Replicating\\ Directory\\ Changes\\ All* OR *1131f6ad\\-9c07\\-11d1\\-f79f\\-00c04fc2dcd2*)) AND (NOT (SubjectDomainName:\"Window\\ Manager\"))) AND (NOT (SubjectUserName.keyword:(NT\\ AUTHORITY* OR *$))))')\n",
    "response = s.execute()\n",
    "if response.success():\n",
    "    df = pd.DataFrame((d.to_dict() for d in s.scan()))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Show Results"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "df.head()"
   ]
  }
 ],
 "metadata": {},
 "nbformat": 4,
 "nbformat_minor": 4
}