Microsoft Sentinel Analytic Rules
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Infoblox - Many High Threat Level Queries From Single Host Detected

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Id3822b794-fa89-4420-aad6-0e1a2307f419
RulenameInfoblox - Many High Threat Level Queries From Single Host Detected
DescriptionAt least 200 high threat level queries generated by single host in 1 hour. Queries do not need to be the same. Customize query count, scheduling, responses and more. This rule depends on a parser based on a Kusto Function to work as expected called **InfobloxCDC**.
SeverityMedium
TacticsImpact
TechniquesT1498
T1565
Required data connectorsInfobloxCloudDataConnector
InfobloxCloudDataConnectorAma
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Infoblox Cloud Data Connector/Analytic Rules/Infoblox-ManyHighThreatLevelQueriesFromSingleHostDetected.yaml
Version1.0.1
Arm template3822b794-fa89-4420-aad6-0e1a2307f419.json
Deploy To Azure
let threshold = 200;
InfobloxCDC
| where DeviceEventClassID has_cs "RPZ"
| where ThreatLevel_Score >= 80
| summarize count() by SourceIP
| where count_ > threshold
| join kind=inner (InfobloxCDC
  | where DeviceEventClassID has_cs "RPZ"
  | where ThreatLevel_Score >= 80
  ) on SourceIP
queryPeriod: 1h
eventGroupingSettings:
  aggregationKind: SingleAlert
kind: Scheduled
triggerThreshold: 0
relevantTechniques:
- T1498
- T1565
customDetails:
  SourceMACAddress: SourceMACAddress
triggerOperator: gt
version: 1.0.1
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: SourceIP
  entityType: IP
- fieldMappings:
  - identifier: HostName
    columnName: DeviceName
  - identifier: OSVersion
    columnName: InfobloxB1SrcOSVersion
  - identifier: FullName
    columnName: SourceUserName
  entityType: Host
query: |
  let threshold = 200;
  InfobloxCDC
  | where DeviceEventClassID has_cs "RPZ"
  | where ThreatLevel_Score >= 80
  | summarize count() by SourceIP
  | where count_ > threshold
  | join kind=inner (InfobloxCDC
    | where DeviceEventClassID has_cs "RPZ"
    | where ThreatLevel_Score >= 80
    ) on SourceIP  
name: Infoblox - Many High Threat Level Queries From Single Host Detected
queryFrequency: 1h
requiredDataConnectors:
- connectorId: InfobloxCloudDataConnector
  dataTypes:
  - CommonSecurityLog (InfobloxCDC)
- connectorId: InfobloxCloudDataConnectorAma
  dataTypes:
  - CommonSecurityLog (InfobloxCDC)
description: |
    'At least 200 high threat level queries generated by single host in 1 hour. Queries do not need to be the same. Customize query count, scheduling, responses and more. This rule depends on a parser based on a Kusto Function to work as expected called [**InfobloxCDC**](https://aka.ms/sentinel-InfobloxCloudDataConnector-parser).'
incidentConfiguration:
  createIncident: true
status: Available
id: 3822b794-fa89-4420-aad6-0e1a2307f419
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Infoblox Cloud Data Connector/Analytic Rules/Infoblox-ManyHighThreatLevelQueriesFromSingleHostDetected.yaml
tactics:
- Impact
severity: Medium
{
  "$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/3822b794-fa89-4420-aad6-0e1a2307f419')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/3822b794-fa89-4420-aad6-0e1a2307f419')]",
      "properties": {
        "alertRuleTemplateName": "3822b794-fa89-4420-aad6-0e1a2307f419",
        "customDetails": {
          "SourceMACAddress": "SourceMACAddress"
        },
        "description": "'At least 200 high threat level queries generated by single host in 1 hour. Queries do not need to be the same. Customize query count, scheduling, responses and more. This rule depends on a parser based on a Kusto Function to work as expected called [**InfobloxCDC**](https://aka.ms/sentinel-InfobloxCloudDataConnector-parser).'\n",
        "displayName": "Infoblox - Many High Threat Level Queries From Single Host Detected",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "HostName"
              },
              {
                "columnName": "InfobloxB1SrcOSVersion",
                "identifier": "OSVersion"
              },
              {
                "columnName": "SourceUserName",
                "identifier": "FullName"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": true
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Infoblox Cloud Data Connector/Analytic Rules/Infoblox-ManyHighThreatLevelQueriesFromSingleHostDetected.yaml",
        "query": "let threshold = 200;\nInfobloxCDC\n| where DeviceEventClassID has_cs \"RPZ\"\n| where ThreatLevel_Score >= 80\n| summarize count() by SourceIP\n| where count_ > threshold\n| join kind=inner (InfobloxCDC\n  | where DeviceEventClassID has_cs \"RPZ\"\n  | where ThreatLevel_Score >= 80\n  ) on SourceIP\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1498",
          "T1565"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}