Critical Severity Incident | Microsoft Sentinel Analytic Rules

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Id	4f1c9e6e-8b6b-4d2a-9f3e-123456789abc
Rulename	Critical Severity Incident
Description	Triggers an incident for every Morphisec alert whose attacks severity is critical.
Severity	High
Tactics	Execution DefenseEvasion
Techniques	T1059 T1204
Required data connectors	MorphisecCCF
Kind	Scheduled
Query frequency	10m
Query period	10m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Morphisec/Analytic%20Rules/MorphisecCriticalSeverityIncident.yaml
Version	1.0.0
Arm template	4f1c9e6e-8b6b-4d2a-9f3e-123456789abc.json

KQL

MorphisecAlerts_CL
| where threatMessageArrivalTime >= ago(10m)
| where attackSeverity == "CRITICAL"
| summarize arg_max(threatMessageArrivalTime, *) by id

YAML

suppressionEnabled: false
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: hostname
  entityType: Host
- fieldMappings:
  - identifier: CommandLine
    columnName: processCommandLine
  entityType: Process
alertDetailsOverride:
  alertDisplayNameFormat: 'Critical alert detected: {{threatSubType}}'
id: 4f1c9e6e-8b6b-4d2a-9f3e-123456789abc
suppressionDuration: 5h
triggerOperator: gt
tactics:
- Execution
- DefenseEvasion
kind: Scheduled
requiredDataConnectors:
- dataTypes:
  - Morphisec
  connectorId: MorphisecCCF
queryPeriod: 10m
eventGroupingSettings:
  aggregationKind: SingleAlert
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Morphisec/Analytic%20Rules/MorphisecCriticalSeverityIncident.yaml
severity: High
relevantTechniques:
- T1059
- T1204
triggerThreshold: 0
version: 1.0.0
name: Critical Severity Incident
status: Available
query: |
  MorphisecAlerts_CL
  | where threatMessageArrivalTime >= ago(10m)
  | where attackSeverity == "CRITICAL"
  | summarize arg_max(threatMessageArrivalTime, *) by id
description: |
  'Triggers an incident for every Morphisec alert whose attacks severity is critical.'
queryFrequency: 10m
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    lookbackDuration: 5h
    reopenClosedIncident: false
    matchingMethod: AllEntities
  createIncident: true

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/4f1c9e6e-8b6b-4d2a-9f3e-123456789abc')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4f1c9e6e-8b6b-4d2a-9f3e-123456789abc')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDisplayNameFormat": "Critical alert detected: {{threatSubType}}"
        },
        "alertRuleTemplateName": "4f1c9e6e-8b6b-4d2a-9f3e-123456789abc",
        "customDetails": null,
        "description": "'Triggers an incident for every Morphisec alert whose attacks severity is critical.'\n",
        "displayName": "Critical Severity Incident",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "hostname",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "processCommandLine",
                "identifier": "CommandLine"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": false,
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Morphisec/Analytic%20Rules/MorphisecCriticalSeverityIncident.yaml",
        "query": "MorphisecAlerts_CL\n| where threatMessageArrivalTime >= ago(10m)\n| where attackSeverity == \"CRITICAL\"\n| summarize arg_max(threatMessageArrivalTime, *) by id\n",
        "queryFrequency": "PT10M",
        "queryPeriod": "PT10M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT5H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion",
          "Execution"
        ],
        "techniques": [
          "T1059",
          "T1204"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}