API - Suspicious Login

let firstRec = FortyTwoCrunchAPIProtection
| where TimeGenerated >= ago(5m) 
| project-away NonBlockingMode, SourcePort, DestinationPort, Query, ApiId, RequestHeader, ResponseHeader, Errors, EventType, Uuid
| where UriPath has "/api/login?user=" and Status in (200, 403);
let ipAddressCount = toscalar(firstRec | summarize by SourceIp | count);
let secondRec = firstRec | summarize arg_max(TimeGenerated, *) by SourceIp;
let recCount = iff((toscalar(secondRec | count) > 3), ipAddressCount, 0);
secondRec | take recCount

entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: SourceIp
    identifier: Address
- entityType: Host
  fieldMappings:
  - columnName: Hostname
    identifier: HostName
- entityType: Account
  fieldMappings:
  - columnName: InstanceName
    identifier: FullName
query: |
  let firstRec = FortyTwoCrunchAPIProtection
  | where TimeGenerated >= ago(5m) 
  | project-away NonBlockingMode, SourcePort, DestinationPort, Query, ApiId, RequestHeader, ResponseHeader, Errors, EventType, Uuid
  | where UriPath has "/api/login?user=" and Status in (200, 403);
  let ipAddressCount = toscalar(firstRec | summarize by SourceIp | count);
  let secondRec = firstRec | summarize arg_max(TimeGenerated, *) by SourceIp;
  let recCount = iff((toscalar(secondRec | count) > 3), ipAddressCount, 0);
  secondRec | take recCount
eventGroupingSettings:
  aggregationKind: SingleAlert
id: 7bdc10d6-aa24-4ca9-9a93-802cd8761354
queryFrequency: 5m
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch%20API%20Protection/Analytic%20Rules/APISuspiciousLogin.yaml
version: 3.0.1
severity: High
relevantTechniques:
- T1110
- T1190
name: API - Suspicious Login
kind: Scheduled
tactics:
- CredentialAccess
- InitialAccess
requiredDataConnectors:
- dataTypes:
  - FortyTwoCrunchAPIProtection
  connectorId: 42CrunchAPIProtection
- dataTypes:
  - FortyTwoCrunchAPIProtection
  connectorId: FortyTwoCrunchAPIProtection
description: |
  '42Crunch API protection against suspicious login'
customDetails: 
triggerOperator: gt
triggerThreshold: 0
queryPeriod: 5m

{
  "$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/7bdc10d6-aa24-4ca9-9a93-802cd8761354')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/7bdc10d6-aa24-4ca9-9a93-802cd8761354')]",
      "properties": {
        "alertRuleTemplateName": "7bdc10d6-aa24-4ca9-9a93-802cd8761354",
        "customDetails": null,
        "description": "'42Crunch API protection against suspicious login'\n",
        "displayName": "API - Suspicious Login",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIp",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Hostname",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "InstanceName",
                "identifier": "FullName"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch%20API%20Protection/Analytic%20Rules/APISuspiciousLogin.yaml",
        "query": "let firstRec = FortyTwoCrunchAPIProtection\n| where TimeGenerated >= ago(5m) \n| project-away NonBlockingMode, SourcePort, DestinationPort, Query, ApiId, RequestHeader, ResponseHeader, Errors, EventType, Uuid\n| where UriPath has \"/api/login?user=\" and Status in (200, 403);\nlet ipAddressCount = toscalar(firstRec | summarize by SourceIp | count);\nlet secondRec = firstRec | summarize arg_max(TimeGenerated, *) by SourceIp;\nlet recCount = iff((toscalar(secondRec | count) > 3), ipAddressCount, 0);\nsecondRec | take recCount\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess",
          "InitialAccess"
        ],
        "techniques": [
          "T1110",
          "T1190"
        ],
        "templateVersion": "3.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}