let threshold = 10;
let err = dynamic(['NXDOMAIN', 'SERVFAIL', 'REFUSED']);
GCPCloudDNS
| where EventResultDetails in~ (err)
| summarize count() by SrcIpAddr, bin(TimeGenerated, 10m)
| where count_ > threshold
| extend IPCustomEntity = SrcIpAddr
entityMappings:
- fieldMappings:
- columnName: IPCustomEntity
identifier: Address
entityType: IP
triggerOperator: gt
tactics:
- CommandAndControl
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSMultipleErrorsFromIp.yaml
version: 1.0.0
triggerThreshold: 0
relevantTechniques:
- T1095
queryPeriod: 1h
query: |
let threshold = 10;
let err = dynamic(['NXDOMAIN', 'SERVFAIL', 'REFUSED']);
GCPCloudDNS
| where EventResultDetails in~ (err)
| summarize count() by SrcIpAddr, bin(TimeGenerated, 10m)
| where count_ > threshold
| extend IPCustomEntity = SrcIpAddr
severity: Medium
kind: Scheduled
name: Google DNS - Multiple errors for source
queryFrequency: 1h
id: 7e81a935-5e91-45a5-92fd-3b58c180513b
description: |
'Detects multiple errors for the same source IP address.'
requiredDataConnectors:
- dataTypes:
- GCPCloudDNS
connectorId: GCPDNSDataConnector