{
  "$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/633a91df-d031-4b6e-a413-607a61540559')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/633a91df-d031-4b6e-a413-607a61540559')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "Detected {{EventName}} in {{AWSRegion}} affecting account {{RecipientAccountId}} logging telemetry.",
          "alertDisplayNameFormat": "AWS log tampering attempt: {{EventName}} by {{AccountName}}"
        },
        "alertRuleTemplateName": "633a91df-d031-4b6e-a413-607a61540559",
        "customDetails": {
          "AWSRegion": "AWSRegion",
          "EventName": "EventName",
          "EventSource": "EventSource",
          "EventTypeName": "EventTypeName"
        },
        "description": "Detects successful attempts to disable, delete, or weaken AWS logging telemetry, including CloudTrail,\nCloudWatch/EventBridge, and VPC flow logs. This behavior can indicate defense evasion and deliberate reduction\nof incident visibility by an attacker.\n",
        "displayName": "AWSCloudTrail - Tampering to AWS CloudTrail logs",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              },
              {
                "columnName": "RecipientAccountId",
                "identifier": "CloudAppAccountId"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIpAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon%20Web%20Services/Analytic%20Rules/AWS_LogTampering.yaml",
        "query": "let EventNameList = dynamic([\"UpdateTrail\",\"DeleteTrail\",\"StopLogging\",\"DeleteFlowLogs\",\"DeleteEventBus\",\"DeleteLogGroup\"]);\nAWSCloudTrail\n| where (EventName in~ (EventNameList) or (EventName == \"UpdateTrail\" and (parse_json(RequestParameters).enableLogFileValidation) == false) or (EventName == \"UpdateTrail\" and (parse_json(RequestParameters).isMultiRegionTrail) == false)) and isempty(ErrorMessage) and isempty(ErrorCode)\n| extend UserIdentityArn = iif(isempty(UserIdentityArn), tostring(parse_json(Resources)[0].ARN), UserIdentityArn)\n| extend UserName = tostring(split(UserIdentityArn, '/')[-1])\n| extend AccountName = case( UserIdentityPrincipalid == \"Anonymous\", \"Anonymous\", isempty(UserIdentityUserName), UserName, UserIdentityUserName)\n| extend AccountName = iif(AccountName contains \"@\", tostring(split(AccountName, '@', 0)[0]), AccountName),\n AccountUPNSuffix = iif(AccountName contains \"@\", tostring(split(AccountName, '@', 1)[0]), \"\")\n| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated) by EventName, EventTypeName, RecipientAccountId, AccountName, AccountUPNSuffix, UserIdentityAccountId, UserIdentityPrincipalid, UserAgent, \nUserIdentityUserName, SessionMfaAuthenticated, SourceIpAddress, AWSRegion, EventSource\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "High",
        "status": "Available",
        "subTechniques": [
          "T1562.008"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion"
        ],
        "techniques": [
          "T1562"
        ],
        "templateVersion": "1.0.5",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}