New High Severity Vulnerability Detected Across Multiple Hosts

let threshold = 10;
QualysHostDetectionV2_CL
| extend Status = tostring(Status_s), Vulnerability = tostring(QID_s), Severity = tostring(Severity_s)
| where Status =~ "New" and Severity == "5"
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), dcount(NetBios_s) by tostring(QID_s)
| where dcount_NetBios_s >= threshold
| extend timestamp = StartTime

triggerOperator: gt
queryFrequency: 1h
description: |
    'This creates an incident when a new high severity vulnerability is detected across multilple hosts'
status: Available
kind: Scheduled
triggerThreshold: 0
requiredDataConnectors:
- connectorId: QualysVulnerabilityManagement
  dataTypes:
  - QualysHostDetection_CL
version: 1.0.1
queryPeriod: 1h
name: New High Severity Vulnerability Detected Across Multiple Hosts
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/QualysVM/Analytic Rules/NewHighSeverityVulnDetectedAcrossMulitpleHostsV2.yaml
id: 6116dc19-475a-4148-84b2-efe89c073e27
tactics:
- InitialAccess
relevantTechniques:
- T1190
severity: Medium
query: |
  let threshold = 10;
  QualysHostDetectionV2_CL
  | extend Status = tostring(Status_s), Vulnerability = tostring(QID_s), Severity = tostring(Severity_s)
  | where Status =~ "New" and Severity == "5"
  | summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), dcount(NetBios_s) by tostring(QID_s)
  | where dcount_NetBios_s >= threshold
  | extend timestamp = StartTime  

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/6116dc19-475a-4148-84b2-efe89c073e27')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/6116dc19-475a-4148-84b2-efe89c073e27')]",
      "properties": {
        "alertRuleTemplateName": "6116dc19-475a-4148-84b2-efe89c073e27",
        "customDetails": null,
        "description": "'This creates an incident when a new high severity vulnerability is detected across multilple hosts'\n",
        "displayName": "New High Severity Vulnerability Detected Across Multiple Hosts",
        "enabled": true,
        "entityMappings": null,
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/QualysVM/Analytic Rules/NewHighSeverityVulnDetectedAcrossMulitpleHostsV2.yaml",
        "query": "let threshold = 10;\nQualysHostDetectionV2_CL\n| extend Status = tostring(Status_s), Vulnerability = tostring(QID_s), Severity = tostring(Severity_s)\n| where Status =~ \"New\" and Severity == \"5\"\n| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), dcount(NetBios_s) by tostring(QID_s)\n| where dcount_NetBios_s >= threshold\n| extend timestamp = StartTime\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1190"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}