Microsoft Sentinel Analytic Rules
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Cisco WSA - Access to unwanted site

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Id38029e86-030c-46c4-8a91-a2be7c74d74c
RulenameCisco WSA - Access to unwanted site
DescriptionDetects when users attempting to access sites from high risk category.
SeverityHigh
TacticsInitialAccess
TechniquesT1566
Required data connectorsCiscoWSA
SyslogAma
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAAccessToUnwantedSite.yaml
Version1.0.2
Arm template38029e86-030c-46c4-8a91-a2be7c74d74c.json
Deploy To Azure
let risky_sites = dynamic(['IW_adlt', 'IW_hack', 'IW_porn']);
CiscoWSAEvent
| where UrlCategory in~ (risky_sites)
| where DvcAction =~ 'DEFAULT_CASE'
| extend AccountCustomEntity = SrcUserName
name: Cisco WSA - Access to unwanted site
version: 1.0.2
severity: High
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1566
status: Available
description: |
    'Detects when users attempting to access sites from high risk category.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAAccessToUnwantedSite.yaml
requiredDataConnectors:
- connectorId: CiscoWSA
  dataTypes:
  - CiscoWSAEvent
- connectorId: SyslogAma
  datatypes:
  - Syslog
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: AccountCustomEntity
  entityType: Account
tactics:
- InitialAccess
queryPeriod: 1h
query: |
  let risky_sites = dynamic(['IW_adlt', 'IW_hack', 'IW_porn']);
  CiscoWSAEvent
  | where UrlCategory in~ (risky_sites)
  | where DvcAction =~ 'DEFAULT_CASE'
  | extend AccountCustomEntity = SrcUserName  
kind: Scheduled
triggerThreshold: 0
id: 38029e86-030c-46c4-8a91-a2be7c74d74c
{
  "$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/38029e86-030c-46c4-8a91-a2be7c74d74c')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/38029e86-030c-46c4-8a91-a2be7c74d74c')]",
      "properties": {
        "alertRuleTemplateName": "38029e86-030c-46c4-8a91-a2be7c74d74c",
        "customDetails": null,
        "description": "'Detects when users attempting to access sites from high risk category.'\n",
        "displayName": "Cisco WSA - Access to unwanted site",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAAccessToUnwantedSite.yaml",
        "query": "let risky_sites = dynamic(['IW_adlt', 'IW_hack', 'IW_porn']);\nCiscoWSAEvent\n| where UrlCategory in~ (risky_sites)\n| where DvcAction =~ 'DEFAULT_CASE'\n| extend AccountCustomEntity = SrcUserName\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1566"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}