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

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Sticky Key Like Backdoor Usage\n",
    "Detects the usage and installation of a backdoor that uses an option to register a malicious debugger for built-in tools that are accessible in the login screen"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Rule Content\n",
    "```\n",
    "- action: global\n",
    "  title: Sticky Key Like Backdoor Usage\n",
    "  id: baca5663-583c-45f9-b5dc-ea96a22ce542\n",
    "  description: Detects the usage and installation of a backdoor that uses an option\n",
    "    to register a malicious debugger for built-in tools that are accessible in the\n",
    "    login screen\n",
    "  references:\n",
    "  - https://blogs.technet.microsoft.com/jonathantrull/2016/10/03/detecting-sticky-key-backdoors/\n",
    "  tags:\n",
    "  - attack.privilege_escalation\n",
    "  - attack.persistence\n",
    "  - attack.t1015\n",
    "  - car.2014-11-003\n",
    "  - car.2014-11-008\n",
    "  author: Florian Roth, @twjackomo\n",
    "  date: 2018/03/15\n",
    "  detection:\n",
    "    condition: 1 of them\n",
    "  falsepositives:\n",
    "  - Unlikely\n",
    "  level: critical\n",
    "- logsource:\n",
    "    product: windows\n",
    "    service: sysmon\n",
    "  detection:\n",
    "    selection_registry:\n",
    "      EventID: 13\n",
    "      TargetObject:\n",
    "      - '*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\sethc.exe\\Debugger'\n",
    "      - '*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\utilman.exe\\Debugger'\n",
    "      - '*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\osk.exe\\Debugger'\n",
    "      - '*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\Magnify.exe\\Debugger'\n",
    "      - '*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\Narrator.exe\\Debugger'\n",
    "      - '*\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options\\DisplaySwitch.exe\\Debugger'\n",
    "      EventType: SetValue\n",
    "- logsource:\n",
    "    category: process_creation\n",
    "    product: windows\n",
    "  detection:\n",
    "    selection_process:\n",
    "      ParentImage:\n",
    "      - '*\\winlogon.exe'\n",
    "      CommandLine:\n",
    "      - '*cmd.exe sethc.exe *'\n",
    "      - '*cmd.exe utilman.exe *'\n",
    "      - '*cmd.exe osk.exe *'\n",
    "      - '*cmd.exe Magnify.exe *'\n",
    "      - '*cmd.exe Narrator.exe *'\n",
    "      - '*cmd.exe DisplaySwitch.exe *'\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='(event_id:\"13\" AND registry_key_path.keyword:(*\\\\SOFTWARE\\\\Microsoft\\\\Windows\\ NT\\\\CurrentVersion\\\\Image\\ File\\ Execution\\ Options\\\\sethc.exe\\\\Debugger OR *\\\\SOFTWARE\\\\Microsoft\\\\Windows\\ NT\\\\CurrentVersion\\\\Image\\ File\\ Execution\\ Options\\\\utilman.exe\\\\Debugger OR *\\\\SOFTWARE\\\\Microsoft\\\\Windows\\ NT\\\\CurrentVersion\\\\Image\\ File\\ Execution\\ Options\\\\osk.exe\\\\Debugger OR *\\\\SOFTWARE\\\\Microsoft\\\\Windows\\ NT\\\\CurrentVersion\\\\Image\\ File\\ Execution\\ Options\\\\Magnify.exe\\\\Debugger OR *\\\\SOFTWARE\\\\Microsoft\\\\Windows\\ NT\\\\CurrentVersion\\\\Image\\ File\\ Execution\\ Options\\\\Narrator.exe\\\\Debugger OR *\\\\SOFTWARE\\\\Microsoft\\\\Windows\\ NT\\\\CurrentVersion\\\\Image\\ File\\ Execution\\ Options\\\\DisplaySwitch.exe\\\\Debugger) AND event_type:\"SetValue\")')\n",
    "response = s.execute()\n",
    "if response.success():\n",
    "    df = pd.DataFrame((d.to_dict() for d in s.scan()))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "s = searchContext.query('query_string', query='(process_parent_path.keyword:(*\\\\winlogon.exe) AND process_command_line.keyword:(*cmd.exe\\ sethc.exe\\ * OR *cmd.exe\\ utilman.exe\\ * OR *cmd.exe\\ osk.exe\\ * OR *cmd.exe\\ Magnify.exe\\ * OR *cmd.exe\\ Narrator.exe\\ * OR *cmd.exe\\ DisplaySwitch.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
}