PaloAlto - Possible flooding

PaloAltoCDLEvent
| where EventResourceId =~ 'TRAFFIC'
| where isnotempty(NetworkSessionId)
| where DstBytes == 0 and tolong(NetworkPackets) > 0
| extend AccountCustomEntity = DstUsername, IPCustomEntity = SrcIpAddr

kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAltoCDL/Analytic Rules/PaloAltoCDLPossibleFlooding.yaml
severity: Medium
name: PaloAlto - Possible flooding
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
relevantTechniques:
- T1190
- T1133
queryFrequency: 1h
triggerThreshold: 0
queryPeriod: 1h
description: |
    'Detects possible flooding.'
id: feb185cc-51f4-11ec-bf63-0242ac130002
version: 1.0.2
tactics:
- InitialAccess
query: |
  PaloAltoCDLEvent
  | where EventResourceId =~ 'TRAFFIC'
  | where isnotempty(NetworkSessionId)
  | where DstBytes == 0 and tolong(NetworkPackets) > 0
  | extend AccountCustomEntity = DstUsername, IPCustomEntity = SrcIpAddr  
status: Available
requiredDataConnectors:
- dataTypes:
  - PaloAltoCDLEvent
  connectorId: PaloAltoCDL
- dataTypes:
  - PaloAltoCDLEvent
  connectorId: PaloAltoCDLAma
triggerOperator: gt

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/feb185cc-51f4-11ec-bf63-0242ac130002')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/feb185cc-51f4-11ec-bf63-0242ac130002')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "PaloAlto - Possible flooding",
        "description": "'Detects possible flooding.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "PaloAltoCDLEvent\n| where EventResourceId =~ 'TRAFFIC'\n| where isnotempty(NetworkSessionId)\n| where DstBytes == 0 and tolong(NetworkPackets) > 0\n| extend AccountCustomEntity = DstUsername, IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1190",
          "T1133"
        ],
        "alertRuleTemplateName": "feb185cc-51f4-11ec-bf63-0242ac130002",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "AccountCustomEntity"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAltoCDL/Analytic Rules/PaloAltoCDLPossibleFlooding.yaml",
        "status": "Available",
        "templateVersion": "1.0.2"
      }
    }
  ]
}