mirror of https://github.com/infosecn1nja/HELK.git
137 lines
3.3 KiB
Plaintext
137 lines
3.3 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Weak Encryption Enabled and Kerberoast\n",
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"Detects scenario where weak encryption is enabled for a user profile which could be used for hash/password cracking."
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Rule Content\n",
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"```\n",
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"- title: Weak Encryption Enabled and Kerberoast\n",
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" id: f6de9536-0441-4b3f-a646-f4e00f300ffd\n",
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" description: Detects scenario where weak encryption is enabled for a user profile\n",
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" which could be used for hash/password cracking.\n",
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" references:\n",
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" - https://adsecurity.org/?p=2053\n",
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" - https://www.harmj0y.net/blog/activedirectory/roasting-as-reps/\n",
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" author: '@neu5ron'\n",
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" tags:\n",
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" - attack.defense_evasion\n",
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" - attack.t1089\n",
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" logsource:\n",
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" product: windows\n",
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" service: security\n",
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" definition: 'Requirements: Audit Policy : Account Management > Audit User Account\n",
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" Management, Group Policy : Computer Configuration\\Windows Settings\\Security\n",
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" Settings\\Advanced Audit Policy Configuration\\Audit Policies\\Account Management\\Audit\n",
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" User Account Management'\n",
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" category: null\n",
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" detection:\n",
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" selection:\n",
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" EventID: 4738\n",
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" keywords:\n",
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" Message:\n",
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" - '*DES*'\n",
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" - '*Preauth*'\n",
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" - '*Encrypted*'\n",
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" filters:\n",
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" Message:\n",
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" - '*Enabled*'\n",
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" condition: selection and keywords and filters\n",
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" falsepositives:\n",
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" - Unknown\n",
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" level: high\n",
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"\n",
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"```"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Querying Elasticsearch"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### Import Libraries"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"from elasticsearch import Elasticsearch\n",
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"from elasticsearch_dsl import Search\n",
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"import pandas as pd"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### Initialize Elasticsearch client"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"es = Elasticsearch(['http://helk-elasticsearch:9200'])\n",
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"searchContext = Search(using=es, index='logs-endpoint-winevent-security-*', doc_type='doc')"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### Run Elasticsearch Query"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"s = searchContext.query('query_string', query='(event_id:\"4738\" AND Message.keyword:(*DES* OR *Preauth* OR *Encrypted*) AND Message.keyword:(*Enabled*))')\n",
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"response = s.execute()\n",
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"if response.success():\n",
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" df = pd.DataFrame((d.to_dict() for d in s.scan()))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"### Show Results"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"df.head()"
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]
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}
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],
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"metadata": {},
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"nbformat": 4,
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"nbformat_minor": 4
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}
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