Claroty - Multiple failed logins to same destinations

let threshold = 10;
  ClarotyEvent
  | where EventType has 'Login to SRA'
  | where EventType !has 'succeeded'
  | extend Site = column_ifexists("site_name","")
  | where isnotempty(Site)
  | extend SrcUsername = extract(@'User\s(.*?)\sfailed', 1, EventMessage)
  | summarize FailedLogins = count(), SampleUser = any(SrcUsername) by Site, bin(TimeGenerated, 5m)
  | where FailedLogins > threshold
  | extend SGCustomEntity = Site
  | project TimeGenerated, Site, FailedLogins, Threshold = threshold, SampleUser, SGCustomEntity

entityMappings:
- entityType: SecurityGroup
  fieldMappings:
  - identifier: DistinguishedName
    columnName: SGCustomEntity
name: Claroty - Multiple failed logins to same destinations
kind: Scheduled
triggerOperator: gt
status: Available
queryPeriod: 1h
requiredDataConnectors:
- connectorId: CefAma
  dataTypes:
  - CommonSecurityLog
tactics:
- InitialAccess
query: |
  let threshold = 10;
    ClarotyEvent
    | where EventType has 'Login to SRA'
    | where EventType !has 'succeeded'
    | extend Site = column_ifexists("site_name","")
    | where isnotempty(Site)
    | extend SrcUsername = extract(@'User\s(.*?)\sfailed', 1, EventMessage)
    | summarize FailedLogins = count(), SampleUser = any(SrcUsername) by Site, bin(TimeGenerated, 5m)
    | where FailedLogins > threshold
    | extend SGCustomEntity = Site
    | project TimeGenerated, Site, FailedLogins, Threshold = threshold, SampleUser, SGCustomEntity
description: Detects multiple failed login attempts to the same Claroty SRA destination site within a 5-minute window. The rule counts failed logins per site and alerts when the number of failures exceeds the threshold value of 10.
severity: High
id: 1c2310ef-19bf-4caf-b2b0-a4c983932fa5
triggerThreshold: 0
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Claroty/Analytic%20Rules/ClarotyMultipleFailedLoginsSameDst.yaml
version: 1.0.4
relevantTechniques:
- T1190
- T1133

{
  "$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/1c2310ef-19bf-4caf-b2b0-a4c983932fa5')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1c2310ef-19bf-4caf-b2b0-a4c983932fa5')]",
      "properties": {
        "alertRuleTemplateName": "1c2310ef-19bf-4caf-b2b0-a4c983932fa5",
        "customDetails": null,
        "description": "Detects multiple failed login attempts to the same Claroty SRA destination site within a 5-minute window. The rule counts failed logins per site and alerts when the number of failures exceeds the threshold value of 10.",
        "displayName": "Claroty - Multiple failed logins to same destinations",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "SecurityGroup",
            "fieldMappings": [
              {
                "columnName": "SGCustomEntity",
                "identifier": "DistinguishedName"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Claroty/Analytic%20Rules/ClarotyMultipleFailedLoginsSameDst.yaml",
        "query": "let threshold = 10;\n  ClarotyEvent\n  | where EventType has 'Login to SRA'\n  | where EventType !has 'succeeded'\n  | extend Site = column_ifexists(\"site_name\",\"\")\n  | where isnotempty(Site)\n  | extend SrcUsername = extract(@'User\\s(.*?)\\sfailed', 1, EventMessage)\n  | summarize FailedLogins = count(), SampleUser = any(SrcUsername) by Site, bin(TimeGenerated, 5m)\n  | where FailedLogins > threshold\n  | extend SGCustomEntity = Site\n  | project TimeGenerated, Site, FailedLogins, Threshold = threshold, SampleUser, SGCustomEntity\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1133",
          "T1190"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}