Microsoft Sentinel Analytic Rules
cloudbrothers.infoAzure Sentinel RepoToggle Dark/Light/Auto modeToggle Dark/Light/Auto modeToggle Dark/Light/Auto modeBack to homepage

Google DNS - Multiple errors for source

Back
Id7e81a935-5e91-45a5-92fd-3b58c180513b
RulenameGoogle DNS - Multiple errors for source
DescriptionDetects multiple errors for the same source IP address.
SeverityMedium
TacticsCommandAndControl
TechniquesT1095
Required data connectorsGCPDNSDataConnector
KindScheduled
Query frequency1h
Query period1h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSMultipleErrorsFromIp.yaml
Version1.0.0
Arm template7e81a935-5e91-45a5-92fd-3b58c180513b.json
Deploy To Azure
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
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSMultipleErrorsFromIp.yaml
id: 7e81a935-5e91-45a5-92fd-3b58c180513b
name: Google DNS - Multiple errors for source
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  
entityMappings:
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
queryPeriod: 1h
triggerThreshold: 0
tactics:
- CommandAndControl
version: 1.0.0
kind: Scheduled
relevantTechniques:
- T1095
queryFrequency: 1h
requiredDataConnectors:
- dataTypes:
  - GCPCloudDNS
  connectorId: GCPDNSDataConnector
description: |
    'Detects multiple errors for the same source IP address.'
triggerOperator: gt
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/7e81a935-5e91-45a5-92fd-3b58c180513b')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/7e81a935-5e91-45a5-92fd-3b58c180513b')]",
      "properties": {
        "alertRuleTemplateName": "7e81a935-5e91-45a5-92fd-3b58c180513b",
        "customDetails": null,
        "description": "'Detects multiple errors for the same source IP address.'\n",
        "displayName": "Google DNS - Multiple errors for source",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformDNS/Analytic Rules/GCPDNSMultipleErrorsFromIp.yaml",
        "query": "let threshold = 10;\nlet err = dynamic(['NXDOMAIN', 'SERVFAIL', 'REFUSED']);\nGCPCloudDNS\n| where EventResultDetails in~ (err)\n| summarize count() by SrcIpAddr, bin(TimeGenerated, 10m)\n| where count_ > threshold\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1095"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}