{
  "$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/d82e1987-4356-4a7b-bc5e-064f29b143c0')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d82e1987-4356-4a7b-bc5e-064f29b143c0')]",
      "properties": {
        "alertRuleTemplateName": "d82e1987-4356-4a7b-bc5e-064f29b143c0",
        "customDetails": null,
        "description": "'This query idenifies when rundll32.exe executes a specific set of inline VBScript commands\n References: https://www.microsoft.com/security/blog/2021/03/04/goldmax-goldfinder-sibot-analyzing-nobelium-malware/'\n",
        "displayName": "Midnight Blizzard - suspicious rundll32.exe execution of vbscript",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "SubjectAccount",
                "identifier": "FullName"
              },
              {
                "columnName": "SubjectUserName",
                "identifier": "Name"
              },
              {
                "columnName": "SubjectDomainName",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "SubjectUserSid",
                "identifier": "Sid"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "HostNameDomain",
                "identifier": "DnsDomain"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityEvent/MidnightBlizzard_SuspiciousRundll32Exec.yaml",
        "query": "(union isfuzzy=true \n(SecurityEvent\n| where EventID == 4688\n| where Process =~ 'rundll32.exe' \n| where CommandLine has_all ('Execute','RegRead','window.close')\n| project TimeGenerated, Computer, SubjectAccount = Account, SubjectUserName, SubjectDomainName, SubjectUserSid, Process, ProcessId, NewProcessName, CommandLine, ParentProcessName, _ResourceId\n),\n(WindowsEvent\n| where EventID == 4688 and EventData has 'rundll32.exe' and EventData has_any ('Execute','RegRead','window.close')\n| extend NewProcessName = tostring(EventData.NewProcessName)\n| extend Process=tostring(split(NewProcessName, '\\\\')[-1])\n| where Process =~ 'rundll32.exe' \n| extend CommandLine = tostring(EventData.CommandLine)\n| where CommandLine has_all ('Execute','RegRead','window.close')\n| extend SubjectAccount =  strcat(EventData.SubjectDomainName,\"\\\\\", EventData.SubjectUserName)\n| extend ParentProcessName = tostring(EventData.ParentProcessName)  \n| project TimeGenerated, Computer, SubjectAccount, SubjectUserName = tostring(EventData.SubjectUserName), SubjectDomainName = tostring(EventData.SubjectDomainName), SubjectUserSid = tostring(EventData.SubjectUserSid), Process, NewProcessName, CommandLine, ParentProcessName, _ResourceId\n)\n)\n| extend HostName = tostring(split(Computer, \".\")[0]), DomainIndex = toint(indexof(Computer, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)\n| project-away DomainIndex\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "Medium",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence"
        ],
        "tags": [
          "Midnight Blizzard"
        ],
        "techniques": [
          "T1547"
        ],
        "templateVersion": "1.1.6",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}