{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Ursnif\n",
    "Detects new registry key created by Ursnif malware."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Rule Content\n",
    "```\n",
    "- title: Ursnif\n",
    "  id: 21f17060-b282-4249-ade0-589ea3591558\n",
    "  status: experimental\n",
    "  description: Detects new registry key created by Ursnif malware.\n",
    "  references:\n",
    "  - https://blog.yoroi.company/research/ursnif-long-live-the-steganography/\n",
    "  - https://blog.trendmicro.com/trendlabs-security-intelligence/phishing-campaign-uses-hijacked-emails-to-deliver-ursnif-by-replying-to-ongoing-threads/\n",
    "  tags:\n",
    "  - attack.execution\n",
    "  - attack.t1112\n",
    "  author: megan201296\n",
    "  date: 2019/02/13\n",
    "  logsource:\n",
    "    product: windows\n",
    "    service: sysmon\n",
    "    category: null\n",
    "  detection:\n",
    "    selection:\n",
    "      EventID: 13\n",
    "      TargetObject: '*\\Software\\AppDataLow\\Software\\Microsoft\\\\*'\n",
    "    condition: selection\n",
    "  falsepositives:\n",
    "  - Unknown\n",
    "  level: critical\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:\"13\" AND registry_key_path.keyword:*\\\\Software\\\\AppDataLow\\\\Software\\\\Microsoft\\\\*)')\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
}