Google DNS - Multiple errors to same domain

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Id	da04a5d6-e2be-4cba-8cdb-a3f2efa87e9e
Rulename	Google DNS - Multiple errors to same domain
Description	Detects multiple errors to same domain.
Severity	Medium
Tactics	CommandAndControl
Techniques	T1095
Required data connectors	GCPDNSDataConnector
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/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSMultipleErrorsQuery.yaml
Version	1.0.0
Arm template	da04a5d6-e2be-4cba-8cdb-a3f2efa87e9e.json

KQL

let threshold = 2;
let err = dynamic(['NXDOMAIN', 'SERVFAIL', 'REFUSED']);
GCPCloudDNS
| where EventResultDetails in~ (err)
| summarize ips = makeset(SrcIpAddr) by Query, bin(TimeGenerated, 10m)
| where array_length(ips) >= threshold
| extend DNSCustomEntity = Query, IPCustomEntity = ips

YAML

requiredDataConnectors:
- connectorId: GCPDNSDataConnector
  dataTypes:
  - GCPCloudDNS
kind: Scheduled
tactics:
- CommandAndControl
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSMultipleErrorsQuery.yaml
id: da04a5d6-e2be-4cba-8cdb-a3f2efa87e9e
name: Google DNS - Multiple errors to same domain
triggerOperator: gt
entityMappings:
- entityType: DNS
  fieldMappings:
  - columnName: DNSCustomEntity
    identifier: DomainName
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
queryFrequency: 1h
description: |
    'Detects multiple errors to same domain.'
version: 1.0.0
relevantTechniques:
- T1095
queryPeriod: 1h
severity: Medium
triggerThreshold: 0
query: |
  let threshold = 2;
  let err = dynamic(['NXDOMAIN', 'SERVFAIL', 'REFUSED']);
  GCPCloudDNS
  | where EventResultDetails in~ (err)
  | summarize ips = makeset(SrcIpAddr) by Query, bin(TimeGenerated, 10m)
  | where array_length(ips) >= threshold
  | extend DNSCustomEntity = Query, IPCustomEntity = ips

ARM