Cisco WSA - Unexpected file type

CiscoWSAEvent
| where isnotempty(AmpFileName)
| where isempty(AmpThreatName)
| where ResponseBodyMimeType =~ 'application/octet-stream'
| where AmpFileName !endswith '.exe'
| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = SrcUserName

kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAUnexpectedFileType.yaml
severity: Medium
name: Cisco WSA - Unexpected file type
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
relevantTechniques:
- T1189
queryFrequency: 1h
triggerThreshold: 0
queryPeriod: 1h
description: |
    'Detects unexpected file type.'
id: 8e9d1f70-d529-4598-9d3e-5dd5164d1d02
version: 1.0.0
tactics:
- InitialAccess
query: |
  CiscoWSAEvent
  | where isnotempty(AmpFileName)
  | where isempty(AmpThreatName)
  | where ResponseBodyMimeType =~ 'application/octet-stream'
  | where AmpFileName !endswith '.exe'
  | extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = SrcUserName  
status: Available
requiredDataConnectors:
- dataTypes:
  - CiscoWSAEvent
  connectorId: CiscoWSA
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/8e9d1f70-d529-4598-9d3e-5dd5164d1d02')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/8e9d1f70-d529-4598-9d3e-5dd5164d1d02')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Cisco WSA - Unexpected file type",
        "description": "'Detects unexpected file type.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "CiscoWSAEvent\n| where isnotempty(AmpFileName)\n| where isempty(AmpThreatName)\n| where ResponseBodyMimeType =~ 'application/octet-stream'\n| where AmpFileName !endswith '.exe'\n| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = SrcUserName\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1189"
        ],
        "alertRuleTemplateName": "8e9d1f70-d529-4598-9d3e-5dd5164d1d02",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "AccountCustomEntity"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAUnexpectedFileType.yaml",
        "status": "Available",
        "templateVersion": "1.0.0"
      }
    }
  ]
}