{
  "$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/9f7dc779-1e51-4925-ae4a-db1db933077f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9f7dc779-1e51-4925-ae4a-db1db933077f')]",
      "properties": {
        "alertRuleTemplateName": "9f7dc779-1e51-4925-ae4a-db1db933077f",
        "customDetails": null,
        "description": "'Identifies a match in Security Event data from any File Hash IOC from TI'\n",
        "displayName": "TI Map File Hash to Security Event",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Account",
                "identifier": "FullName"
              },
              {
                "columnName": "Name",
                "identifier": "Name"
              },
              {
                "columnName": "NTDomain",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "DnsDomain",
                "identifier": "DnsDomain"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "Url",
                "identifier": "Url"
              }
            ]
          },
          {
            "entityType": "FileHash",
            "fieldMappings": [
              {
                "columnName": "FileHashValue",
                "identifier": "Value"
              },
              {
                "columnName": "FileHashType",
                "identifier": "Algorithm"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat%20Intelligence%20%28NEW%29/Analytic%20Rules/FileHashEntity_SecurityEvent.yaml",
        "query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d;\nThreatIntelIndicators\n//extract key part of kv pair\n      | extend IndicatorType = replace(@\"\\[|\\]|\\\"\"\", \"\", tostring(split(ObservableKey, \":\", 0)))\n      | where IndicatorType == \"file\"\n      | extend FileHashType = replace(\"'\", \"\", substring(ObservableKey, indexof(ObservableKey, \"hashes.\") + 7, strlen(ObservableKey) - indexof(ObservableKey, \"hashes.\") - 7))\n      | extend FileHashValue = toupper(ObservableValue)\n| where TimeGenerated >= ago(ioc_lookBack)\n| extend FileHashValue = toupper(FileHashValue)\n| extend IndicatorId = tostring(split(Id, \"--\")[2])\n| extend Url = iff(ObservableKey == \"url:value\", ObservableValue, \"\")\n| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue\n| where IsActive and (ValidUntil > now() or isempty(ValidUntil))\n  | project-reorder *, FileHashType, FileHashValue, Type\n// using innerunique to keep perf fast and result set low, we only need one match to indicate potential malicious activity that needs to be investigated\n| join kind=innerunique ( union isfuzzy=true\n  (SecurityEvent | where TimeGenerated >= ago(dt_lookBack)\n      | where EventID in (\"8003\",\"8002\",\"8005\")\n      | extend SecurityEvent_TimeGenerated = TimeGenerated, Event = EventID, FileHash = toupper(FileHash)\n  ),\n  (WindowsEvent | where TimeGenerated >= ago(dt_lookBack)\n      | where EventID in (\"8003\",\"8002\",\"8005\")\n      | extend SecurityEvent_TimeGenerated = TimeGenerated, Event = EventID, FileHash = toupper(EventData.FileHash)\n  )\n)\non $left.FileHashValue == $right.FileHash\n| where SecurityEvent_TimeGenerated < ValidUntil\n| extend Description = tostring(parse_json(Data).description)\n| extend ActivityGroupNames = extract(@\"ActivityGroup:(\\S+)\", 1, tostring(parse_json(Data).labels))\n| summarize SecurityEvent_TimeGenerated = arg_max(SecurityEvent_TimeGenerated, *) by IndicatorId, FileHash\n| project SecurityEvent_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ValidUntil, Confidence,\nProcess, FileHash, Computer, Account, Event, FileHashValue, FileHashType, Url\n| extend NTDomain = tostring(split(Account, '\\\\', 0)[0]), Name = tostring(split(Account, '\\\\', 1)[0])\n| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.')) \n| extend timestamp = SecurityEvent_TimeGenerated\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "P14D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.4.10",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}