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 connectorsSyslogAma
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAAccessToUnwantedSite.yaml
Version1.0.3
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
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']);
  CiscoWSAEvent
  | where UrlCategory in~ (risky_sites)
  | where DvcAction =~ 'DEFAULT_CASE'
  | extend AccountCustomEntity = SrcUserName  
description: |
    'Detects when users attempting to access sites from high risk category.'
severity: High
requiredDataConnectors:
- datatypes:
  - Syslog
  connectorId: SyslogAma
name: Cisco WSA - Access to unwanted site
triggerThreshold: 0
tactics:
- InitialAccess
version: 1.0.3
relevantTechniques:
- T1566
triggerOperator: gt
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
id: 38029e86-030c-46c4-8a91-a2be7c74d74c
status: Available
kind: Scheduled
queryFrequency: 1h
queryPeriod: 1h
{
  "$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": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}