{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# WScript or CScript Dropper\n",
    "Detects wscript/cscript executions of scripts located in user directories"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Rule Content\n",
    "```\n",
    "- title: WScript or CScript Dropper\n",
    "  id: cea72823-df4d-4567-950c-0b579eaf0846\n",
    "  status: experimental\n",
    "  description: Detects wscript/cscript executions of scripts located in user directories\n",
    "  author: Margaritis Dimitrios (idea), Florian Roth (rule)\n",
    "  tags:\n",
    "  - attack.defense_evasion\n",
    "  - attack.execution\n",
    "  - attack.t1064\n",
    "  logsource:\n",
    "    category: process_creation\n",
    "    product: windows\n",
    "    service: null\n",
    "  detection:\n",
    "    selection:\n",
    "      Image:\n",
    "      - '*\\wscript.exe'\n",
    "      - '*\\cscript.exe'\n",
    "      CommandLine:\n",
    "      - '* C:\\Users\\\\*.jse *'\n",
    "      - '* C:\\Users\\\\*.vbe *'\n",
    "      - '* C:\\Users\\\\*.js *'\n",
    "      - '* C:\\Users\\\\*.vba *'\n",
    "      - '* C:\\Users\\\\*.vbs *'\n",
    "      - '* C:\\ProgramData\\\\*.jse *'\n",
    "      - '* C:\\ProgramData\\\\*.vbe *'\n",
    "      - '* C:\\ProgramData\\\\*.js *'\n",
    "      - '* C:\\ProgramData\\\\*.vba *'\n",
    "      - '* C:\\ProgramData\\\\*.vbs *'\n",
    "    falsepositive:\n",
    "      ParentImage: '*\\winzip*'\n",
    "    condition: selection and not falsepositive\n",
    "  fields:\n",
    "  - CommandLine\n",
    "  - ParentCommandLine\n",
    "  falsepositives:\n",
    "  - Winzip\n",
    "  - Other self-extractors\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-*', 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:(*\\\\wscript.exe OR *\\\\cscript.exe) AND process_command_line.keyword:(*\\ C\\:\\\\Users\\\\*.jse\\ * OR *\\ C\\:\\\\Users\\\\*.vbe\\ * OR *\\ C\\:\\\\Users\\\\*.js\\ * OR *\\ C\\:\\\\Users\\\\*.vba\\ * OR *\\ C\\:\\\\Users\\\\*.vbs\\ * OR *\\ C\\:\\\\ProgramData\\\\*.jse\\ * OR *\\ C\\:\\\\ProgramData\\\\*.vbe\\ * OR *\\ C\\:\\\\ProgramData\\\\*.js\\ * OR *\\ C\\:\\\\ProgramData\\\\*.vba\\ * OR *\\ C\\:\\\\ProgramData\\\\*.vbs\\ *)) AND (NOT (process_parent_path.keyword:*\\\\winzip*)))')\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
}