mirror of https://github.com/infosecn1nja/HELK.git
131 lines
3.1 KiB
Plaintext
131 lines
3.1 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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"# Renamed PsExec\n",
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"Detects the execution of a renamed PsExec often used by attackers or malware"
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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: Renamed PsExec\n",
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" id: a7a7e0e5-1d57-49df-9c58-9fe5bc0346a2\n",
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" status: experimental\n",
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" description: Detects the execution of a renamed PsExec often used by attackers or\n",
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" malware\n",
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" references:\n",
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" - https://www.trendmicro.com/vinfo/hk-en/security/news/cybercrime-and-digital-threats/megacortex-ransomware-spotted-attacking-enterprise-networks\n",
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" author: Florian Roth\n",
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" date: 2019/05/21\n",
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" tags:\n",
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" - car.2013-05-009\n",
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" logsource:\n",
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" product: windows\n",
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" service: sysmon\n",
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" category: null\n",
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" detection:\n",
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" selection:\n",
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" Description: Execute processes remotely\n",
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" Product: Sysinternals PsExec\n",
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" filter:\n",
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" Image:\n",
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" - '*\\PsExec.exe'\n",
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" - '*\\PsExec64.exe'\n",
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" condition: selection and not filter\n",
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" falsepositives:\n",
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" - Software that illegaly integrates PsExec in a renamed form\n",
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" - Administrators that have renamed PsExec and no one knows why\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-sysmon-*', 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='((file_description:\"Execute\\ processes\\ remotely\" AND file_product:\"Sysinternals\\ PsExec\") AND (NOT (process_path.keyword:(*\\\\PsExec.exe OR *\\\\PsExec64.exe))))')\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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