TI Map IP Entity to Duo Security

let dt_lookBack = 1h;
let ioc_lookBack = 14d;
ThreatIntelligenceIndicator
// Picking up only IOC's that contain the entities we want
| where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)
| where TimeGenerated >= ago(ioc_lookBack)
// As there is potentially more than 1 indicator type for matching IP, taking NetworkIP first, then others if that is empty.
// Taking the first non-empty value based on potential IOC match availability
| extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)
| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)
| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
| join (
    DuoSecurityAuthentication_CL
    | where TimeGenerated >= ago(dt_lookBack)
    | where isnotempty(access_device_ip_s)
    // renaming time column so it is clear the log this came from
    | extend Duo_TimeGenerated = isotimestamp_t
)
on $left.TI_ipEntity == $right.access_device_ip_s
| where TimeGenerated >= ago(ioc_lookBack)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
| project LatestIndicatorTime, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, Duo_TimeGenerated,
TI_ipEntity, user_name_s, factor_s, result_s, application_name_s, event_type_s, txid_g, user_key_s, access_device_ip_s, access_device_location_city_s, access_device_location_state_s, access_device_location_country_s
| extend timestamp = Duo_TimeGenerated, Name = tostring(split(user_name_s, '@', 0)[0]), UPNSuffix = tostring(split(user_name_s, '@', 1)[0])

relevantTechniques:
- T1071
name: TI Map IP Entity to Duo Security
requiredDataConnectors:
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligence
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligenceTaxii
- dataTypes:
  - CiscoDuo
  connectorId: CiscoDuoSecurity
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: MicrosoftDefenderThreatIntelligence
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: user_name_s
  - identifier: Name
    columnName: Name
  - identifier: UPNSuffix
    columnName: UPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: access_device_ip_s
  entityType: IP
triggerThreshold: 0
id: d23ed927-5be3-4902-a9c1-85f841eb4fa1
tactics:
- CommandAndControl
version: 1.0.6
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_DuoSecurity.yaml
queryPeriod: 14d
kind: Scheduled
queryFrequency: 1h
severity: Medium
description: |
    'This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in DuoSecurity.'
query: |
  let dt_lookBack = 1h;
  let ioc_lookBack = 14d;
  ThreatIntelligenceIndicator
  // Picking up only IOC's that contain the entities we want
  | where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)
  | where TimeGenerated >= ago(ioc_lookBack)
  // As there is potentially more than 1 indicator type for matching IP, taking NetworkIP first, then others if that is empty.
  // Taking the first non-empty value based on potential IOC match availability
  | extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)
  | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)
  | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
  | where Active == true and ExpirationDateTime > now()
  | join (
      DuoSecurityAuthentication_CL
      | where TimeGenerated >= ago(dt_lookBack)
      | where isnotempty(access_device_ip_s)
      // renaming time column so it is clear the log this came from
      | extend Duo_TimeGenerated = isotimestamp_t
  )
  on $left.TI_ipEntity == $right.access_device_ip_s
  | where TimeGenerated >= ago(ioc_lookBack)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
  | where Active == true and ExpirationDateTime > now()
  | project LatestIndicatorTime, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, Duo_TimeGenerated,
  TI_ipEntity, user_name_s, factor_s, result_s, application_name_s, event_type_s, txid_g, user_key_s, access_device_ip_s, access_device_location_city_s, access_device_location_state_s, access_device_location_country_s
  | extend timestamp = Duo_TimeGenerated, Name = tostring(split(user_name_s, '@', 0)[0]), UPNSuffix = tostring(split(user_name_s, '@', 1)[0])  
triggerOperator: gt

{
  "$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/d23ed927-5be3-4902-a9c1-85f841eb4fa1')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d23ed927-5be3-4902-a9c1-85f841eb4fa1')]",
      "properties": {
        "alertRuleTemplateName": "d23ed927-5be3-4902-a9c1-85f841eb4fa1",
        "customDetails": null,
        "description": "'This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in DuoSecurity.'\n",
        "displayName": "TI Map IP Entity to Duo Security",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "user_name_s",
                "identifier": "FullName"
              },
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "UPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "access_device_ip_s",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_DuoSecurity.yaml",
        "query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nThreatIntelligenceIndicator\n// Picking up only IOC's that contain the entities we want\n| where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)\n| where TimeGenerated >= ago(ioc_lookBack)\n// As there is potentially more than 1 indicator type for matching IP, taking NetworkIP first, then others if that is empty.\n// Taking the first non-empty value based on potential IOC match availability\n| extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)\n| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)\n| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n| where Active == true and ExpirationDateTime > now()\n| join (\n    DuoSecurityAuthentication_CL\n    | where TimeGenerated >= ago(dt_lookBack)\n    | where isnotempty(access_device_ip_s)\n    // renaming time column so it is clear the log this came from\n    | extend Duo_TimeGenerated = isotimestamp_t\n)\non $left.TI_ipEntity == $right.access_device_ip_s\n| where TimeGenerated >= ago(ioc_lookBack)\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n| where Active == true and ExpirationDateTime > now()\n| project LatestIndicatorTime, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, Duo_TimeGenerated,\nTI_ipEntity, user_name_s, factor_s, result_s, application_name_s, event_type_s, txid_g, user_key_s, access_device_ip_s, access_device_location_city_s, access_device_location_state_s, access_device_location_country_s\n| extend timestamp = Duo_TimeGenerated, Name = tostring(split(user_name_s, '@', 0)[0]), UPNSuffix = tostring(split(user_name_s, '@', 1)[0])\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.0.6",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}