mirror of https://github.com/infosecn1nja/HELK.git
135 lines
3.6 KiB
Plaintext
135 lines
3.6 KiB
Plaintext
{
|
|
"cells": [
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"# Suspicious Keyboard Layout Load\n",
|
|
"Detects the keyboard preload installation with a suspicious keyboard layout, e.g. Chinese, Iranian or Vietnamese layout load in user session on systems maintained by US staff only"
|
|
]
|
|
},
|
|
{
|
|
"cell_type": "markdown",
|
|
"metadata": {},
|
|
"source": [
|
|
"## Rule Content\n",
|
|
"```\n",
|
|
"- title: Suspicious Keyboard Layout Load\n",
|
|
" id: 34aa0252-6039-40ff-951f-939fd6ce47d8\n",
|
|
" description: Detects the keyboard preload installation with a suspicious keyboard\n",
|
|
" layout, e.g. Chinese, Iranian or Vietnamese layout load in user session on systems\n",
|
|
" maintained by US staff only\n",
|
|
" references:\n",
|
|
" - https://renenyffenegger.ch/notes/Windows/registry/tree/HKEY_CURRENT_USER/Keyboard-Layout/Preload/index\n",
|
|
" - https://github.com/SwiftOnSecurity/sysmon-config/pull/92/files\n",
|
|
" author: Florian Roth\n",
|
|
" date: 2019/10/12\n",
|
|
" modified: 2019/10/15\n",
|
|
" logsource:\n",
|
|
" product: windows\n",
|
|
" service: sysmon\n",
|
|
" definition: 'Requirements: Sysmon config that monitors \\Keyboard Layout\\Preload\n",
|
|
" subkey of the HKLU hives - see https://github.com/SwiftOnSecurity/sysmon-config/pull/92/files'\n",
|
|
" category: null\n",
|
|
" detection:\n",
|
|
" selection_registry:\n",
|
|
" EventID: 13\n",
|
|
" TargetObject:\n",
|
|
" - '*\\Keyboard Layout\\Preload\\*'\n",
|
|
" - '*\\Keyboard Layout\\Substitutes\\*'\n",
|
|
" Details:\n",
|
|
" - 00000429\n",
|
|
" - 00050429\n",
|
|
" - 0000042a\n",
|
|
" condition: selection_registry\n",
|
|
" falsepositives:\n",
|
|
" - Administrators or users that actually use the selected keyboard layouts (heavily\n",
|
|
" depends on the organisation's user base)\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-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:(*\\\\Keyboard\\ Layout\\\\Preload\\* OR *\\\\Keyboard\\ Layout\\\\Substitutes\\*) AND registry_key_value:(\"00000429\" OR \"00050429\" OR \"0000042a\"))')\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
|
|
}
|