Critical Severity Incident

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

ARM