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

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

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"
    }
  ]
}