{
  "$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/90d3f6ec-80fb-48e0-9937-2c70c9df9bad')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/90d3f6ec-80fb-48e0-9937-2c70c9df9bad')]",
      "properties": {
        "alertRuleTemplateName": "90d3f6ec-80fb-48e0-9937-2c70c9df9bad",
        "customDetails": null,
        "description": "'Check for Squid proxy events associated with common ToR proxies. This query presumes the default squid log format is being used.\nhttp://www.squid-cache.org/Doc/config/access_log/'\n",
        "displayName": "Squid proxy events for ToR proxies",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "User",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "URL",
                "identifier": "Url"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Syslog/Analytic%20Rules/squid_tor_proxies.yaml",
        "query": "let DomainList = dynamic([\"tor2web.org\", \"tor2web.com\", \"torlink.co\", \"onion.to\", \"onion.ink\", \"onion.cab\", \"onion.nu\", \"onion.link\",\n\"onion.it\", \"onion.city\", \"onion.direct\", \"onion.top\", \"onion.casa\", \"onion.plus\", \"onion.rip\", \"onion.dog\", \"tor2web.fi\",\n\"tor2web.blutmagie.de\", \"onion.sh\", \"onion.lu\", \"onion.pet\", \"t2w.pw\", \"tor2web.ae.org\", \"tor2web.io\", \"tor2web.xyz\", \"onion.lt\",\n\"s1.tor-gateways.de\", \"s2.tor-gateways.de\", \"s3.tor-gateways.de\", \"s4.tor-gateways.de\", \"s5.tor-gateways.de\", \"hiddenservice.net\"]);\nSyslog\n| where ProcessName contains \"squid\"\n| extend URL = extract(\"(([A-Z]+ [a-z]{4,5}:\\\\/\\\\/)|[A-Z]+ )([^ :]*)\",3,SyslogMessage),\n        SourceIP = extract(\"([0-9]+ )(([0-9]{1,3})\\\\.([0-9]{1,3})\\\\.([0-9]{1,3})\\\\.([0-9]{1,3}))\",2,SyslogMessage),\n        Status = extract(\"(TCP_(([A-Z]+)(_[A-Z]+)*)|UDP_(([A-Z]+)(_[A-Z]+)*))\",1,SyslogMessage),\n        HTTP_Status_Code = extract(\"(TCP_(([A-Z]+)(_[A-Z]+)*)|UDP_(([A-Z]+)(_[A-Z]+)*))/([0-9]{3})\",8,SyslogMessage),\n        User = extract(\"(CONNECT |GET )([^ ]* )([^ ]+)\",3,SyslogMessage),\n        RemotePort = extract(\"(CONNECT |GET )([^ ]*)(:)([0-9]*)\",4,SyslogMessage),\n        Domain = extract(\"(([A-Z]+ [a-z]{4,5}:\\\\/\\\\/)|[A-Z]+ )([^ :\\\\/]*)\",3,SyslogMessage),\n        Bytes = toint(extract(\"([A-Z]+\\\\/[0-9]{3} )([0-9]+)\",2,SyslogMessage)),\n        contentType = extract(\"([a-z/]+$)\",1,SyslogMessage)\n| extend TLD = extract(\"\\\\.[a-z]*$\",0,Domain)\n| where HTTP_Status_Code == \"200\"\n| where Domain contains \".\"\n| where Domain has_any (DomainList)\n| extend AccountName = tostring(split(User, \"@\")[0]), AccountUPNSuffix = tostring(split(User, \"@\")[1])\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "Low",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1008",
          "T1090"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}