Preview - TI map URL entity to Cloud App Events

let dt_lookBack = 1h;
let ioc_lookBack = 14d;
ThreatIntelligenceIndicator
| where TimeGenerated >= ago(ioc_lookBack)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
| join kind=innerunique (CloudAppEvents
| extend Url = extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+);", 1, tostring(ActivityObjects))
| extend userPrincipalName = tostring(parse_json(tostring(AccountId)).userPrincipalName)
| extend TargetResourceDisplayName = tostring(ActivityObjects[0].displayName)
| extend CloudApps_TimeGenerated = TimeGenerated) on Url
| where CloudApps_TimeGenerated < ExpirationDateTime
| summarize CloudApps_TimeGenerated = argmax(CloudApps_TimeGenerated, *) by IndicatorId, Url
| extend Description = max_CloudApps_TimeGenerated_Description, ActivityGroupNames = max_CloudApps_TimeGenerated_ActivityGroupNames, ThreatType = max_CloudApps_TimeGenerated_ThreatType, ExpirationDateTime = max_CloudApps_TimeGenerated_ExpirationDateTime, ConfidenceScore = max_CloudApps_TimeGenerated_ConfidenceScore
| project CloudApps_TimeGenerated, Description, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore

version: 1.0.2
queryPeriod: 14d
id: e8ae92dd-1d41-4530-8be8-85c5014c7b47
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/URLEntity_CloudAppEvents.yaml
triggerThreshold: 0
kind: Scheduled
severity: Medium
description: |
    'Identifies compromises and attacks and detect malicious activities in one's URL entity from TI'
triggerOperator: gt
tactics:
- CommandAndControl
queryFrequency: 1h
query: |
  let dt_lookBack = 1h;
  let ioc_lookBack = 14d;
  ThreatIntelligenceIndicator
  | where TimeGenerated >= ago(ioc_lookBack)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
  | where Active == true and ExpirationDateTime > now()
  | join kind=innerunique (CloudAppEvents
  | extend Url = extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+);", 1, tostring(ActivityObjects))
  | extend userPrincipalName = tostring(parse_json(tostring(AccountId)).userPrincipalName)
  | extend TargetResourceDisplayName = tostring(ActivityObjects[0].displayName)
  | extend CloudApps_TimeGenerated = TimeGenerated) on Url
  | where CloudApps_TimeGenerated < ExpirationDateTime
  | summarize CloudApps_TimeGenerated = argmax(CloudApps_TimeGenerated, *) by IndicatorId, Url
  | extend Description = max_CloudApps_TimeGenerated_Description, ActivityGroupNames = max_CloudApps_TimeGenerated_ActivityGroupNames, ThreatType = max_CloudApps_TimeGenerated_ThreatType, ExpirationDateTime = max_CloudApps_TimeGenerated_ExpirationDateTime, ConfidenceScore = max_CloudApps_TimeGenerated_ConfidenceScore
  | project CloudApps_TimeGenerated, Description, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore  
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - CloudAppEvents
- connectorId: MicrosoftDefenderThreatIntelligence
  dataTypes:
  - ThreatIntelligenceIndicator
relevantTechniques:
- T1071
name: Preview - TI map URL entity to Cloud App Events

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/e8ae92dd-1d41-4530-8be8-85c5014c7b47')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/e8ae92dd-1d41-4530-8be8-85c5014c7b47')]",
      "properties": {
        "alertRuleTemplateName": "e8ae92dd-1d41-4530-8be8-85c5014c7b47",
        "customDetails": null,
        "description": "'Identifies compromises and attacks and detect malicious activities in one's URL entity from TI'\n",
        "displayName": "Preview - TI map URL entity to Cloud App Events",
        "enabled": true,
        "entityMappings": null,
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/URLEntity_CloudAppEvents.yaml",
        "query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nThreatIntelligenceIndicator\n| where TimeGenerated >= ago(ioc_lookBack)\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n| where Active == true and ExpirationDateTime > now()\n| join kind=innerunique (CloudAppEvents\n| extend Url = extract(\"(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\\\(\\\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+);\", 1, tostring(ActivityObjects))\n| extend userPrincipalName = tostring(parse_json(tostring(AccountId)).userPrincipalName)\n| extend TargetResourceDisplayName = tostring(ActivityObjects[0].displayName)\n| extend CloudApps_TimeGenerated = TimeGenerated) on Url\n| where CloudApps_TimeGenerated < ExpirationDateTime\n| summarize CloudApps_TimeGenerated = argmax(CloudApps_TimeGenerated, *) by IndicatorId, Url\n| extend Description = max_CloudApps_TimeGenerated_Description, ActivityGroupNames = max_CloudApps_TimeGenerated_ActivityGroupNames, ThreatType = max_CloudApps_TimeGenerated_ThreatType, ExpirationDateTime = max_CloudApps_TimeGenerated_ExpirationDateTime, ConfidenceScore = max_CloudApps_TimeGenerated_ConfidenceScore\n| project CloudApps_TimeGenerated, Description, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore\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"
    }
  ]
}