Infoblox - TI - Syslog Match Found - URL

let dt_lookBack = 1h;
let ioc_lookBack = 14d;
let TI = ThreatIntelligenceIndicator
| where TimeGenerated >= ago(ioc_lookBack)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()  
| where Description has_cs "Infoblox - URL"
| where isnotempty(DomainName)
;
let Data = Syslog
| extend HitTime = TimeGenerated
| where TimeGenerated >= ago(dt_lookBack)
//Extract URL patterns from syslog message
| extend Url = extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)", 1,SyslogMessage)
| where isnotempty(Url)
;
TI | join kind=innerunique Data on $left.DomainName == $right.Url
| where HitTime >= TimeGenerated and HitTime < ExpirationDateTime
| project LatestIndicatorTime, HitTime, SyslogMessage, Computer, ProcessName, Url, HostIP, 
AdditionalInformation, Description, ThreatType, TrafficLightProtocolLevel, Type, ConfidenceScore, ExpirationDateTime, SourceSystem, Action, IndicatorId, ExternalIndicatorId, Tags

status: Available
triggerOperator: gt
triggerThreshold: 0
name: Infoblox - TI - Syslog Match Found - URL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Infoblox Cloud Data Connector/Analytic Rules/Infoblox-TI-SyslogMatchFound-URL.yaml
queryPeriod: 14d
severity: Medium
eventGroupingSettings:
  aggregationKind: SingleAlert
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: HostIP
    identifier: Address
- entityType: Host
  fieldMappings:
  - columnName: Computer
    identifier: HostName
- entityType: DNS
  fieldMappings:
  - columnName: Url
    identifier: DomainName
- entityType: URL
  fieldMappings:
  - columnName: Url
    identifier: Url
queryFrequency: 1h
relevantTechniques:
- T1498
- T1565
requiredDataConnectors:
- dataTypes:
  - Syslog
  connectorId: Syslog
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: ThreatIntelligence
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
kind: Scheduled
incidentConfiguration:
  createIncident: true
description: |
    'Syslog URL match found in your Infoblox TIDE Threat Intelligence. Customize query count, scheduling, responses and more. Modify data sources, types and threat properties as desired.'
tactics:
- Impact
query: |
  let dt_lookBack = 1h;
  let ioc_lookBack = 14d;
  let TI = ThreatIntelligenceIndicator
  | where TimeGenerated >= ago(ioc_lookBack)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
  | where Active == true and ExpirationDateTime > now()  
  | where Description has_cs "Infoblox - URL"
  | where isnotempty(DomainName)
  ;
  let Data = Syslog
  | extend HitTime = TimeGenerated
  | where TimeGenerated >= ago(dt_lookBack)
  //Extract URL patterns from syslog message
  | extend Url = extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)", 1,SyslogMessage)
  | where isnotempty(Url)
  ;
  TI | join kind=innerunique Data on $left.DomainName == $right.Url
  | where HitTime >= TimeGenerated and HitTime < ExpirationDateTime
  | project LatestIndicatorTime, HitTime, SyslogMessage, Computer, ProcessName, Url, HostIP, 
  AdditionalInformation, Description, ThreatType, TrafficLightProtocolLevel, Type, ConfidenceScore, ExpirationDateTime, SourceSystem, Action, IndicatorId, ExternalIndicatorId, Tags  
id: 28ee3c2b-eb4b-44de-a71e-e462843fea72
version: 1.0.3

{
  "$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/28ee3c2b-eb4b-44de-a71e-e462843fea72')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/28ee3c2b-eb4b-44de-a71e-e462843fea72')]",
      "properties": {
        "alertRuleTemplateName": "28ee3c2b-eb4b-44de-a71e-e462843fea72",
        "customDetails": null,
        "description": "'Syslog URL match found in your Infoblox TIDE Threat Intelligence. Customize query count, scheduling, responses and more. Modify data sources, types and threat properties as desired.'\n",
        "displayName": "Infoblox - TI - Syslog Match Found - URL",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "HostIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "DNS",
            "fieldMappings": [
              {
                "columnName": "Url",
                "identifier": "DomainName"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "Url",
                "identifier": "Url"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": true
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Infoblox Cloud Data Connector/Analytic Rules/Infoblox-TI-SyslogMatchFound-URL.yaml",
        "query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nlet TI = ThreatIntelligenceIndicator\n| where TimeGenerated >= ago(ioc_lookBack)\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n| where Active == true and ExpirationDateTime > now()  \n| where Description has_cs \"Infoblox - URL\"\n| where isnotempty(DomainName)\n;\nlet Data = Syslog\n| extend HitTime = TimeGenerated\n| where TimeGenerated >= ago(dt_lookBack)\n//Extract URL patterns from syslog message\n| extend Url = extract(\"(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\\\(\\\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)\", 1,SyslogMessage)\n| where isnotempty(Url)\n;\nTI | join kind=innerunique Data on $left.DomainName == $right.Url\n| where HitTime >= TimeGenerated and HitTime < ExpirationDateTime\n| project LatestIndicatorTime, HitTime, SyslogMessage, Computer, ProcessName, Url, HostIP, \nAdditionalInformation, Description, ThreatType, TrafficLightProtocolLevel, Type, ConfidenceScore, ExpirationDateTime, SourceSystem, Action, IndicatorId, ExternalIndicatorId, Tags\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1498",
          "T1565"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}