HELK/docker/helk-jupyter/notebooks/sigma/win_admin_share_access.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Access to ADMIN$ Share\n",
    "Detects access to $ADMIN share"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Rule Content\n",
    "```\n",
    "- title: Access to ADMIN$ Share\n",
    "  id: 098d7118-55bc-4912-a836-dc6483a8d150\n",
    "  description: Detects access to $ADMIN share\n",
    "  tags:\n",
    "  - attack.lateral_movement\n",
    "  - attack.t1077\n",
    "  status: experimental\n",
    "  author: Florian Roth\n",
    "  logsource:\n",
    "    product: windows\n",
    "    service: security\n",
    "    definition: The advanced audit policy setting \"Object Access > Audit File Share\"\n",
    "      must be configured for Success/Failure\n",
    "    category: null\n",
    "  detection:\n",
    "    selection:\n",
    "      EventID: 5140\n",
    "      ShareName: Admin$\n",
    "    filter:\n",
    "      SubjectUserName: '*$'\n",
    "    condition: selection and not filter\n",
    "  falsepositives:\n",
    "  - Legitimate administrative activity\n",
    "  level: low\n",
    "\n",
    "```"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Querying Elasticsearch"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Import Libraries"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from elasticsearch import Elasticsearch\n",
    "from elasticsearch_dsl import Search\n",
    "import pandas as pd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Initialize Elasticsearch client"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "es = Elasticsearch(['http://helk-elasticsearch:9200'])\n",
    "searchContext = Search(using=es, index='logs-endpoint-winevent-security-*', doc_type='doc')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Run Elasticsearch Query"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "s = searchContext.query('query_string', query='((event_id:\"5140\" AND share_name:\"Admin$\") AND (NOT (user_name.keyword:*$)))')\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
}