imProcess_NOBELIUM_SuspiciousRundll32Exec.json

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    },
    "analytic-id": {
      "type": "string",
      "defaultValue": "c62d2a2f-1820-4030-86cc-a6dd2cdb7558",
      "minLength": 1,
      "metadata": {
        "description": "Unique id for the scheduled alert rule"
      }
    }
  },
  "resources": [
    {
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/',parameters('analytic-id'))]",
      "apiVersion": "2020-01-01",
      "kind": "Scheduled",
      "location": "[resourceGroup().location]",
      "properties": {
        "description": "This query idenifies when rundll32.exe executes a specific set of inline VBScript commands\nReferences: https://www.microsoft.com/security/blog/2021/03/04/goldmax-goldfinder-sibot-analyzing-nobelium-malware/\nTo use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/AzSentinelProcessEvent)",
        "displayName": "NOBELIUM - suspicious rundll32.exe execution of vbscript (Normalized Process Events)",
        "enabled": false,
        "query": "imProcessCreate\n| where Process hassuffix 'rundll32.exe'\n| where CommandLine  has_any ('Execute','RegRead','window.close')\n| project TimeGenerated, Dvc, User, Process, CommandLine, ActingProcessName, EventVendor, EventProduct\n| extend timestamp = TimeGenerated, HostCustomEntity = Dvc, AccountCustomEntity = User\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "Medium",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "tactics": [
          "Persistence"
        ]
      }
    }
  ]
}