mirror of https://github.com/infosecn1nja/HELK.git
141 lines
4.0 KiB
Plaintext
141 lines
4.0 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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"# Suspicious Rundll32 Activity\n",
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"Detects suspicious process related to rundll32 based on arguments"
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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: Suspicious Rundll32 Activity\n",
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" id: e593cf51-88db-4ee1-b920-37e89012a3c9\n",
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" description: Detects suspicious process related to rundll32 based on arguments\n",
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" status: experimental\n",
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" references:\n",
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" - http://www.hexacorn.com/blog/2017/05/01/running-programs-via-proxy-jumping-on-a-edr-bypass-trampoline/\n",
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" - https://twitter.com/Hexacorn/status/885258886428725250\n",
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" - https://gist.github.com/ryhanson/227229866af52e2d963cf941af135a52\n",
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" tags:\n",
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" - attack.defense_evasion\n",
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" - attack.execution\n",
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" - attack.t1085\n",
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" author: juju4\n",
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" logsource:\n",
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" category: process_creation\n",
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" product: windows\n",
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" service: null\n",
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" detection:\n",
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" selection:\n",
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" CommandLine:\n",
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" - '*\\rundll32.exe* url.dll,*OpenURL *'\n",
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" - '*\\rundll32.exe* url.dll,*OpenURLA *'\n",
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" - '*\\rundll32.exe* url.dll,*FileProtocolHandler *'\n",
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" - '*\\rundll32.exe* zipfldr.dll,*RouteTheCall *'\n",
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" - '*\\rundll32.exe* Shell32.dll,*Control_RunDLL *'\n",
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" - '*\\rundll32.exe javascript:*'\n",
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" - '* url.dll,*OpenURL *'\n",
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" - '* url.dll,*OpenURLA *'\n",
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" - '* url.dll,*FileProtocolHandler *'\n",
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" - '* zipfldr.dll,*RouteTheCall *'\n",
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" - '* Shell32.dll,*Control_RunDLL *'\n",
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" - '* javascript:*'\n",
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" - '*.RegisterXLL*'\n",
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" condition: selection\n",
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" falsepositives:\n",
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" - False positives depend on scripts and administrative tools used in the monitored\n",
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" environment\n",
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" level: medium\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-*', 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='process_command_line.keyword:(*\\\\rundll32.exe*\\ url.dll,*OpenURL\\ * OR *\\\\rundll32.exe*\\ url.dll,*OpenURLA\\ * OR *\\\\rundll32.exe*\\ url.dll,*FileProtocolHandler\\ * OR *\\\\rundll32.exe*\\ zipfldr.dll,*RouteTheCall\\ * OR *\\\\rundll32.exe*\\ Shell32.dll,*Control_RunDLL\\ * OR *\\\\rundll32.exe\\ javascript\\:* OR *\\ url.dll,*OpenURL\\ * OR *\\ url.dll,*OpenURLA\\ * OR *\\ url.dll,*FileProtocolHandler\\ * OR *\\ zipfldr.dll,*RouteTheCall\\ * OR *\\ Shell32.dll,*Control_RunDLL\\ * OR *\\ javascript\\:* OR *.RegisterXLL*)')\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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