TI Map Domain Entity to DeviceNetworkEvents

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Id	1546f3b3-de8a-4e62-bfea-815422154981
Rulename	TI Map Domain Entity to DeviceNetworkEvents
Description	This query identifies any Domain indicators of compromise (IOCs) from threat intelligence (TI) by searching for matches in DeviceNetworkEvents.
Severity	Medium
Tactics	CommandAndControl
Techniques	T1071
Required data connectors	MicrosoftDefenderThreatIntelligence MicrosoftThreatProtection ThreatIntelligence ThreatIntelligenceTaxii
Kind	Scheduled
Query frequency	1h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/DomainEntity_DeviceNetworkEvents_Updated.yaml
Version	1.0.2
Arm template	1546f3b3-de8a-4e62-bfea-815422154981.json

KQL

let dt_lookBack = 1h;
let ioc_lookBack = 14d;
let DeviceNetworkEvents_ = DeviceNetworkEvents
  | where isnotempty(RemoteUrl)
  | where TimeGenerated >= ago(dt_lookBack)
  | where ActionType !has "ConnectionFailed"
  | extend Domain = tostring(parse_url(tolower(RemoteUrl)).Host)
  | extend TI_Domain = Domain
  | where isnotempty(Domain)
  | project-rename DeviceNetworkEvents_TimeGenerated = TimeGenerated;
let DeviceNetworkEventDomains = DeviceNetworkEvents_
  | distinct Domain
  | summarize make_list(Domain);
ThreatIntelIndicators
| extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
| where isnotempty(IndicatorType) and IndicatorType == "domain-name"
| extend DomainName = tolower(ObservableValue)
| extend TI_DomainEntity = DomainName
| where isnotempty(DomainName)
| where TimeGenerated >= ago(ioc_lookBack)
| extend TI_Domain = tolower(DomainName)
| extend IndicatorId = tostring(split(Id, "--")[2])
| where TI_Domain in (DeviceNetworkEventDomains)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id
| where IsActive == true and ValidUntil > now()
| extend Description = tostring(parse_json(Data).description)
| extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
| where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;"
| project-reorder *, IsActive, Tags, TrafficLightProtocolLevel, DomainName, Type, TI_Domain
| join kind=innerunique (DeviceNetworkEvents_) on $left.TI_Domain == $right.Domain
| where DeviceNetworkEvents_TimeGenerated < ValidUntil
| summarize DeviceNetworkEvents_TimeGenerated = arg_max(DeviceNetworkEvents_TimeGenerated, *) by IndicatorId, TI_Domain
| project DeviceNetworkEvents_TimeGenerated, IndicatorId, TI_Domain, Url = RemoteUrl, Confidence, Description, Tags, TrafficLightProtocolLevel, ActionType, DeviceId, DeviceName, InitiatingProcessAccountUpn, InitiatingProcessCommandLine, RemoteIP, RemotePort
| extend Name = tostring(split(InitiatingProcessAccountUpn, '@', 0)[0]), UPNSuffix = tostring(split(InitiatingProcessAccountUpn, '@', 1)[0])
| extend timestamp = DeviceNetworkEvents_TimeGenerated, UserPrincipalName = InitiatingProcessAccountUpn

YAML

severity: Medium
relevantTechniques:
- T1071
requiredDataConnectors:
- dataTypes:
  - DeviceNetworkEvents
  connectorId: MicrosoftThreatProtection
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligence
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligenceTaxii
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: MicrosoftDefenderThreatIntelligence
triggerThreshold: 0
description: |
    'This query identifies any Domain indicators of compromise (IOCs) from threat intelligence (TI) by searching for matches in DeviceNetworkEvents.'
triggerOperator: gt
name: TI Map Domain Entity to DeviceNetworkEvents
queryFrequency: 1h
version: 1.0.2
query: |
  let dt_lookBack = 1h;
  let ioc_lookBack = 14d;
  let DeviceNetworkEvents_ = DeviceNetworkEvents
    | where isnotempty(RemoteUrl)
    | where TimeGenerated >= ago(dt_lookBack)
    | where ActionType !has "ConnectionFailed"
    | extend Domain = tostring(parse_url(tolower(RemoteUrl)).Host)
    | extend TI_Domain = Domain
    | where isnotempty(Domain)
    | project-rename DeviceNetworkEvents_TimeGenerated = TimeGenerated;
  let DeviceNetworkEventDomains = DeviceNetworkEvents_
    | distinct Domain
    | summarize make_list(Domain);
  ThreatIntelIndicators
  | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
  | where isnotempty(IndicatorType) and IndicatorType == "domain-name"
  | extend DomainName = tolower(ObservableValue)
  | extend TI_DomainEntity = DomainName
  | where isnotempty(DomainName)
  | where TimeGenerated >= ago(ioc_lookBack)
  | extend TI_Domain = tolower(DomainName)
  | extend IndicatorId = tostring(split(Id, "--")[2])
  | where TI_Domain in (DeviceNetworkEventDomains)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id
  | where IsActive == true and ValidUntil > now()
  | extend Description = tostring(parse_json(Data).description)
  | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
  | where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;"
  | project-reorder *, IsActive, Tags, TrafficLightProtocolLevel, DomainName, Type, TI_Domain
  | join kind=innerunique (DeviceNetworkEvents_) on $left.TI_Domain == $right.Domain
  | where DeviceNetworkEvents_TimeGenerated < ValidUntil
  | summarize DeviceNetworkEvents_TimeGenerated = arg_max(DeviceNetworkEvents_TimeGenerated, *) by IndicatorId, TI_Domain
  | project DeviceNetworkEvents_TimeGenerated, IndicatorId, TI_Domain, Url = RemoteUrl, Confidence, Description, Tags, TrafficLightProtocolLevel, ActionType, DeviceId, DeviceName, InitiatingProcessAccountUpn, InitiatingProcessCommandLine, RemoteIP, RemotePort
  | extend Name = tostring(split(InitiatingProcessAccountUpn, '@', 0)[0]), UPNSuffix = tostring(split(InitiatingProcessAccountUpn, '@', 1)[0])
  | extend timestamp = DeviceNetworkEvents_TimeGenerated, UserPrincipalName = InitiatingProcessAccountUpn  
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
- entityType: Host
  fieldMappings:
  - columnName: DeviceName
    identifier: FullName
- entityType: URL
  fieldMappings:
  - columnName: Url
    identifier: Url
- entityType: Process
  fieldMappings:
  - columnName: InitiatingProcessCommandLine
    identifier: CommandLine
tactics:
- CommandAndControl
queryPeriod: 14d
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/DomainEntity_DeviceNetworkEvents_Updated.yaml
id: 1546f3b3-de8a-4e62-bfea-815422154981

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/1546f3b3-de8a-4e62-bfea-815422154981')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1546f3b3-de8a-4e62-bfea-815422154981')]",
      "properties": {
        "alertRuleTemplateName": "1546f3b3-de8a-4e62-bfea-815422154981",
        "customDetails": null,
        "description": "'This query identifies any Domain indicators of compromise (IOCs) from threat intelligence (TI) by searching for matches in DeviceNetworkEvents.'\n",
        "displayName": "TI Map Domain Entity to DeviceNetworkEvents",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "Url",
                "identifier": "Url"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "InitiatingProcessCommandLine",
                "identifier": "CommandLine"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/DomainEntity_DeviceNetworkEvents_Updated.yaml",
        "query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nlet DeviceNetworkEvents_ = DeviceNetworkEvents\n  | where isnotempty(RemoteUrl)\n  | where TimeGenerated >= ago(dt_lookBack)\n  | where ActionType !has \"ConnectionFailed\"\n  | extend Domain = tostring(parse_url(tolower(RemoteUrl)).Host)\n  | extend TI_Domain = Domain\n  | where isnotempty(Domain)\n  | project-rename DeviceNetworkEvents_TimeGenerated = TimeGenerated;\nlet DeviceNetworkEventDomains = DeviceNetworkEvents_\n  | distinct Domain\n  | summarize make_list(Domain);\nThreatIntelIndicators\n| extend IndicatorType = replace(@\"\\[|\\]|\\\"\"\", \"\", tostring(split(ObservableKey, \":\", 0)))\n| where isnotempty(IndicatorType) and IndicatorType == \"domain-name\"\n| extend DomainName = tolower(ObservableValue)\n| extend TI_DomainEntity = DomainName\n| where isnotempty(DomainName)\n| where TimeGenerated >= ago(ioc_lookBack)\n| extend TI_Domain = tolower(DomainName)\n| extend IndicatorId = tostring(split(Id, \"--\")[2])\n| where TI_Domain in (DeviceNetworkEventDomains)\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id\n| where IsActive == true and ValidUntil > now()\n| extend Description = tostring(parse_json(Data).description)\n| extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)\n| where Description !contains_cs \"State: inactive;\" and Description !contains_cs \"State: falsepos;\"\n| project-reorder *, IsActive, Tags, TrafficLightProtocolLevel, DomainName, Type, TI_Domain\n| join kind=innerunique (DeviceNetworkEvents_) on $left.TI_Domain == $right.Domain\n| where DeviceNetworkEvents_TimeGenerated < ValidUntil\n| summarize DeviceNetworkEvents_TimeGenerated = arg_max(DeviceNetworkEvents_TimeGenerated, *) by IndicatorId, TI_Domain\n| project DeviceNetworkEvents_TimeGenerated, IndicatorId, TI_Domain, Url = RemoteUrl, Confidence, Description, Tags, TrafficLightProtocolLevel, ActionType, DeviceId, DeviceName, InitiatingProcessAccountUpn, InitiatingProcessCommandLine, RemoteIP, RemotePort\n| extend Name = tostring(split(InitiatingProcessAccountUpn, '@', 0)[0]), UPNSuffix = tostring(split(InitiatingProcessAccountUpn, '@', 1)[0])\n| extend timestamp = DeviceNetworkEvents_TimeGenerated, UserPrincipalName = InitiatingProcessAccountUpn\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}