Infoblox - Many High Threat Level Queries From Single Host Detected

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Id	3822b794-fa89-4420-aad6-0e1a2307f419
Rulename	Infoblox - Many High Threat Level Queries From Single Host Detected
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.
Severity	Medium
Tactics	Impact
Techniques	T1498 T1565
Required data connectors	CefAma
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Infoblox Cloud Data Connector/Analytic Rules/Infoblox-ManyHighThreatLevelQueriesFromSingleHostDetected.yaml
Version	1.0.3
Arm template	3822b794-fa89-4420-aad6-0e1a2307f419.json

KQL

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

YAML

name: Infoblox - Many High Threat Level Queries From Single Host Detected
relevantTechniques:
- T1498
- T1565
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
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
eventGroupingSettings:
  aggregationKind: SingleAlert
version: 1.0.3
severity: Medium
triggerThreshold: 0
queryPeriod: 1h
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: SourceIP
  entityType: IP
- fieldMappings:
  - identifier: HostName
    columnName: DeviceName
  - identifier: OSVersion
    columnName: InfobloxB1SrcOSVersion
  - identifier: FullName
    columnName: SourceUserName
  entityType: Host
kind: Scheduled
incidentConfiguration:
  createIncident: true
queryFrequency: 1h
status: Available
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  
tactics:
- Impact
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).'
triggerOperator: gt

ARM