{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Execution in Webserver Root Folder\n",
    "Detects a suspicious program execution in a web service root folder (filter out false positives)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Rule Content\n",
    "```\n",
    "- title: Execution in Webserver Root Folder\n",
    "  id: 35efb964-e6a5-47ad-bbcd-19661854018d\n",
    "  status: experimental\n",
    "  description: Detects a suspicious program execution in a web service root folder\n",
    "    (filter out false positives)\n",
    "  author: Florian Roth\n",
    "  tags:\n",
    "  - attack.persistence\n",
    "  - attack.t1100\n",
    "  logsource:\n",
    "    category: process_creation\n",
    "    product: windows\n",
    "    service: null\n",
    "  detection:\n",
    "    selection:\n",
    "      Image:\n",
    "      - '*\\wwwroot\\\\*'\n",
    "      - '*\\wmpub\\\\*'\n",
    "      - '*\\htdocs\\\\*'\n",
    "    filter:\n",
    "      Image:\n",
    "      - '*bin\\\\*'\n",
    "      - '*\\Tools\\\\*'\n",
    "      - '*\\SMSComponent\\\\*'\n",
    "      ParentImage:\n",
    "      - '*\\services.exe'\n",
    "    condition: selection and not filter\n",
    "  fields:\n",
    "  - CommandLine\n",
    "  - ParentCommandLine\n",
    "  falsepositives:\n",
    "  - Various applications\n",
    "  - Tools that include ping or nslookup command invocations\n",
    "  level: medium\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-*', 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='(process_path.keyword:(*\\\\wwwroot\\\\* OR *\\\\wmpub\\\\* OR *\\\\htdocs\\\\*) AND (NOT (process_path.keyword:(*bin\\\\* OR *\\\\Tools\\\\* OR *\\\\SMSComponent\\\\*) AND process_parent_path.keyword:(*\\\\services.exe))))')\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
}