mirror of https://github.com/infosecn1nja/HELK.git
133 lines
3.4 KiB
Plaintext
133 lines
3.4 KiB
Plaintext
{
|
|
"cells": [
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"# DHCP Callout DLL installation\n",
|
|
"Detects the installation of a Callout DLL via CalloutDlls and CalloutEnabled parameter in Registry, which can be used to execute code in context of the DHCP server (restart required)"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"## Rule Content\n",
|
|
"```\n",
|
|
"- title: DHCP Callout DLL installation\n",
|
|
" id: 9d3436ef-9476-4c43-acca-90ce06bdf33a\n",
|
|
" status: experimental\n",
|
|
" description: Detects the installation of a Callout DLL via CalloutDlls and CalloutEnabled\n",
|
|
" parameter in Registry, which can be used to execute code in context of the DHCP\n",
|
|
" server (restart required)\n",
|
|
" references:\n",
|
|
" - https://blog.3or.de/mimilib-dhcp-server-callout-dll-injection.html\n",
|
|
" - https://technet.microsoft.com/en-us/library/cc726884(v=ws.10).aspx\n",
|
|
" - https://msdn.microsoft.com/de-de/library/windows/desktop/aa363389(v=vs.85).aspx\n",
|
|
" date: 2017/05/15\n",
|
|
" author: Dimitrios Slamaris\n",
|
|
" tags:\n",
|
|
" - attack.defense_evasion\n",
|
|
" - attack.t1073\n",
|
|
" - attack.t1112\n",
|
|
" logsource:\n",
|
|
" product: windows\n",
|
|
" service: sysmon\n",
|
|
" category: null\n",
|
|
" detection:\n",
|
|
" selection:\n",
|
|
" EventID: 13\n",
|
|
" TargetObject:\n",
|
|
" - '*\\Services\\DHCPServer\\Parameters\\CalloutDlls'\n",
|
|
" - '*\\Services\\DHCPServer\\Parameters\\CalloutEnabled'\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:\"13\" AND registry_key_path.keyword:(*\\\\Services\\\\DHCPServer\\\\Parameters\\\\CalloutDlls OR *\\\\Services\\\\DHCPServer\\\\Parameters\\\\CalloutEnabled))')\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
|
|
}
|