Preview - TI map File Hash 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()
    | extend FileHashValue = toupper(FileHashValue)
    | where isnotempty(FileHashValue)
    | join kind=innerunique (union isfuzzy=true
    (CloudAppEvents
        | join kind=innerunique (union isfuzzy=true(DeviceFileEvents
        | extend CloudAppEvents_TimeGenerated = TimeGenerated, Event = ReportId, FileHash = toupper(MD5))) on $left.TenantId == $right.TenantId))
    on $left.FileHashValue == $right.MD5
| summarize CloudAppEvents_TimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by IndicatorId, FileHash, FileHashType, FileHashValue
| extend Description = max_CloudAppEvents_TimeGenerated_Description, ActivityGroupNames = max_CloudAppEvents_TimeGenerated_ActivityGroupNames, ThreatType = max_CloudAppEvents_TimeGenerated_ThreatType, ExpirationDateTime = max_CloudAppEvents_TimeGenerated_ExpirationDateTime, ConfidenceScore = max_CloudAppEvents_TimeGenerated_ConfidenceScore, SourceIP = max_CloudAppEvents_TimeGenerated_NetworkSourceIP, SourcePort = max_CloudAppEvents_TimeGenerated_NetworkSourcePort, DestinationIP = max_CloudAppEvents_TimeGenerated_NetworkDestinationIP, DestinationPort = max_CloudAppEvents_TimeGenerated_NetworkDestinationPort, DeviceName = max_CloudAppEvents_TimeGenerated_DeviceName
| project CloudAppEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, SourceIP, SourcePort, DestinationIP, DestinationPort, DeviceName, FileHashType, FileHashValue, FileHash

relevantTechniques:
- T1071
name: Preview - TI map File Hash entity to Cloud App Events
requiredDataConnectors:
- dataTypes:
  - CloudAppEvents
  connectorId: MicrosoftThreatProtection
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: MicrosoftDefenderThreatIntelligence
- dataTypes:
  - DeviceFileEvents
  connectorId: MicrosoftThreatProtection
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: DestinationIP
  entityType: IP
- fieldMappings:
  - identifier: Address
    columnName: SourceIP
  entityType: IP
- fieldMappings:
  - identifier: HostName
    columnName: DeviceName
  entityType: Host
- fieldMappings:
  - identifier: Value
    columnName: FileHashValue
  - identifier: Algorithm
    columnName: FileHashType
  entityType: FileHash
triggerThreshold: 0
id: 2f6bbf88-f5b0-49a3-b2b5-97fc3664e4d4
tactics:
- CommandAndControl
version: 1.0.3
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/FileHashEntity_CloudAppEvents.yaml
queryPeriod: 14d
kind: Scheduled
queryFrequency: 1h
severity: Medium
description: |
    'Identifies compromises and attacks and detect malicious activities in one's file hash entity from TI'
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()
      | extend FileHashValue = toupper(FileHashValue)
      | where isnotempty(FileHashValue)
      | join kind=innerunique (union isfuzzy=true
      (CloudAppEvents
          | join kind=innerunique (union isfuzzy=true(DeviceFileEvents
          | extend CloudAppEvents_TimeGenerated = TimeGenerated, Event = ReportId, FileHash = toupper(MD5))) on $left.TenantId == $right.TenantId))
      on $left.FileHashValue == $right.MD5
  | summarize CloudAppEvents_TimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by IndicatorId, FileHash, FileHashType, FileHashValue
  | extend Description = max_CloudAppEvents_TimeGenerated_Description, ActivityGroupNames = max_CloudAppEvents_TimeGenerated_ActivityGroupNames, ThreatType = max_CloudAppEvents_TimeGenerated_ThreatType, ExpirationDateTime = max_CloudAppEvents_TimeGenerated_ExpirationDateTime, ConfidenceScore = max_CloudAppEvents_TimeGenerated_ConfidenceScore, SourceIP = max_CloudAppEvents_TimeGenerated_NetworkSourceIP, SourcePort = max_CloudAppEvents_TimeGenerated_NetworkSourcePort, DestinationIP = max_CloudAppEvents_TimeGenerated_NetworkDestinationIP, DestinationPort = max_CloudAppEvents_TimeGenerated_NetworkDestinationPort, DeviceName = max_CloudAppEvents_TimeGenerated_DeviceName
  | project CloudAppEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, SourceIP, SourcePort, DestinationIP, DestinationPort, DeviceName, FileHashType, FileHashValue, FileHash  
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/2f6bbf88-f5b0-49a3-b2b5-97fc3664e4d4')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/2f6bbf88-f5b0-49a3-b2b5-97fc3664e4d4')]",
      "properties": {
        "alertRuleTemplateName": "2f6bbf88-f5b0-49a3-b2b5-97fc3664e4d4",
        "customDetails": null,
        "description": "'Identifies compromises and attacks and detect malicious activities in one's file hash entity from TI'\n",
        "displayName": "Preview - TI map File Hash entity to Cloud App Events",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "DestinationIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "FileHash",
            "fieldMappings": [
              {
                "columnName": "FileHashValue",
                "identifier": "Value"
              },
              {
                "columnName": "FileHashType",
                "identifier": "Algorithm"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/FileHashEntity_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    | extend FileHashValue = toupper(FileHashValue)\n    | where isnotempty(FileHashValue)\n    | join kind=innerunique (union isfuzzy=true\n    (CloudAppEvents\n        | join kind=innerunique (union isfuzzy=true(DeviceFileEvents\n        | extend CloudAppEvents_TimeGenerated = TimeGenerated, Event = ReportId, FileHash = toupper(MD5))) on $left.TenantId == $right.TenantId))\n    on $left.FileHashValue == $right.MD5\n| summarize CloudAppEvents_TimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by IndicatorId, FileHash, FileHashType, FileHashValue\n| extend Description = max_CloudAppEvents_TimeGenerated_Description, ActivityGroupNames = max_CloudAppEvents_TimeGenerated_ActivityGroupNames, ThreatType = max_CloudAppEvents_TimeGenerated_ThreatType, ExpirationDateTime = max_CloudAppEvents_TimeGenerated_ExpirationDateTime, ConfidenceScore = max_CloudAppEvents_TimeGenerated_ConfidenceScore, SourceIP = max_CloudAppEvents_TimeGenerated_NetworkSourceIP, SourcePort = max_CloudAppEvents_TimeGenerated_NetworkSourcePort, DestinationIP = max_CloudAppEvents_TimeGenerated_NetworkDestinationIP, DestinationPort = max_CloudAppEvents_TimeGenerated_NetworkDestinationPort, DeviceName = max_CloudAppEvents_TimeGenerated_DeviceName\n| project CloudAppEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, SourceIP, SourcePort, DestinationIP, DestinationPort, DeviceName, FileHashType, FileHashValue, FileHash\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}