{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Apache Threading Error\n",
    "Detects an issue in apache logs that reports threading related errors"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Rule Content\n",
    "```\n",
    "- title: Apache Threading Error\n",
    "  id: e9a2b582-3f6a-48ac-b4a1-6849cdc50b3c\n",
    "  status: experimental\n",
    "  description: Detects an issue in apache logs that reports threading related errors\n",
    "  author: Florian Roth\n",
    "  date: 2019/01/22\n",
    "  references:\n",
    "  - https://github.com/hannob/apache-uaf/blob/master/README.md\n",
    "  logsource:\n",
    "    product: apache\n",
    "    service: null\n",
    "    category: null\n",
    "  detection:\n",
    "    keywords:\n",
    "    - '__pthread_tpp_change_priority: Assertion `new_prio == -1 || (new_prio >= fifo_min_prio\n",
    "      && new_prio <= fifo_max_prio)'\n",
    "    condition: keywords\n",
    "  falsepositives:\n",
    "  - https://bz.apache.org/bugzilla/show_bug.cgi?id=46185\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='__pthread_tpp_change_priority\\:\\ Assertion\\ `new_prio\\ \\=\\=\\ \\-1\\ \\||\\ \\(new_prio\\ \\=\\ fifo_min_prio\\ \\&&\\ new_prio\\ \\=\\ fifo_max_prio\\)')\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
}