let threshold = 15;
GCPCloudDNS
| where QueryTypeName in~ ('SIG', 'RRSIG')
| where NetworkProtocol =~ 'TCP'
| summarize count() by SrcIpAddr, bin(TimeGenerated, 1m)
| where count_ < threshold
| extend IPCustomEntity = SrcIpAddr
queryFrequency: 15m
triggerOperator: gt
tactics:
- PrivilegeEscalation
description: |
'Detects exploitation pattern of CVE-2020-1350 (SIGRED) vulnerability.'
relevantTechniques:
- T1068
query: |
let threshold = 15;
GCPCloudDNS
| where QueryTypeName in~ ('SIG', 'RRSIG')
| where NetworkProtocol =~ 'TCP'
| summarize count() by SrcIpAddr, bin(TimeGenerated, 1m)
| where count_ < threshold
| extend IPCustomEntity = SrcIpAddr
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSSIGREDPattern.yaml
severity: High
triggerThreshold: 0
version: 1.0.0
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
name: Google DNS - CVE-2020-1350 (SIGRED) exploitation pattern
id: 1267d53d-f5fd-418b-b8da-34453a5994c2
requiredDataConnectors:
- connectorId: GCPDNSDataConnector
dataTypes:
- GCPCloudDNS
kind: Scheduled
queryPeriod: 15m
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/1267d53d-f5fd-418b-b8da-34453a5994c2')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1267d53d-f5fd-418b-b8da-34453a5994c2')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "Google DNS - CVE-2020-1350 (SIGRED) exploitation pattern",
"description": "'Detects exploitation pattern of CVE-2020-1350 (SIGRED) vulnerability.'\n",
"severity": "High",
"enabled": true,
"query": "let threshold = 15;\nGCPCloudDNS\n| where QueryTypeName in~ ('SIG', 'RRSIG')\n| where NetworkProtocol =~ 'TCP'\n| summarize count() by SrcIpAddr, bin(TimeGenerated, 1m)\n| where count_ < threshold\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT15M",
"queryPeriod": "PT15M",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"PrivilegeEscalation"
],
"techniques": [
"T1068"
],
"alertRuleTemplateName": "1267d53d-f5fd-418b-b8da-34453a5994c2",
"customDetails": null,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
]
}
],
"templateVersion": "1.0.0",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSSIGREDPattern.yaml"
}
}
]
}