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

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Hijack legit RDP session to move laterally\n",
    "Detects the usage of tsclient share to place a backdoor on the RDP source machine's startup folder"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Rule Content\n",
    "```\n",
    "- title: Hijack legit RDP session to move laterally\n",
    "  id: 52753ea4-b3a0-4365-910d-36cff487b789\n",
    "  status: experimental\n",
    "  description: Detects the usage of tsclient share to place a backdoor on the RDP\n",
    "    source machine's startup folder\n",
    "  date: 2019/02/21\n",
    "  author: Samir Bousseaden\n",
    "  logsource:\n",
    "    product: windows\n",
    "    service: sysmon\n",
    "    category: null\n",
    "  detection:\n",
    "    selection:\n",
    "      EventID: 11\n",
    "      Image: '*\\mstsc.exe'\n",
    "      TargetFileName: '*\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\\\*'\n",
    "    condition: selection\n",
    "  falsepositives:\n",
    "  - unknown\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-sysmon-*', 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:\"11\" AND process_path.keyword:*\\\\mstsc.exe AND TargetFileName.keyword:*\\\\Microsoft\\\\Windows\\\\Start\\ Menu\\\\Programs\\\\Startup\\\\*)')\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
}