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

queryPeriod: 1h
kind: Scheduled
entityMappings:
- entityType: DNS
  fieldMappings:
  - identifier: DomainName
    columnName: DNSCustomEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
requiredDataConnectors:
- connectorId: GCPDNSDataConnector
  dataTypes:
  - GCPCloudDNS
description: |
    'Detects multiple errors to same domain.'
queryFrequency: 1h
triggerOperator: gt
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  
name: Google DNS - Multiple errors to same domain
id: da04a5d6-e2be-4cba-8cdb-a3f2efa87e9e
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSMultipleErrorsQuery.yaml
severity: Medium
version: 1.0.0
relevantTechniques:
- T1095
triggerThreshold: 0
tactics:
- CommandAndControl

ARM