Rubrik Threat Monitoring

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Id	0083cbc4-776e-42ca-8694-6950fd605df9
Rulename	Rubrik Threat Monitoring
Description	Rubrik Threat Monitoring matches Event Name and if match found then generate the incident for each object.
Severity	Medium
Tactics	Persistence
Techniques	T1546
Required data connectors	RubrikSecurityCloudAzureFunctions
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/RubrikSecurityCloud/Analytic Rules/RubrikThreatMonitoring.yaml
Version	1.0.0
Arm template	0083cbc4-776e-42ca-8694-6950fd605df9.json

KQL

Rubrik_Events_Data_CL
| where custom_details_eventName_s endswith "AnalysisMatchesFound" or custom_details_eventName_s contains "ThreatMonitoringHashCatalogAnalysisFailed" or custom_details_eventName_s contains "ThreatMonitoringHashMatchesFound" or custom_details_eventName_s contains "ThreatMonitoringYaraMatchesFound"
| extend hashMatchCount = toint(extract("Found ([0-9]+) hash matches",1, summary_s)),    yaraMatchCount = toint(extract("Found ([0-9]+) YARA rule matches", 1, summary_s)),    fileHashMatchCount = toint(extract("Found file hash matches for ([0-9]+) files", 1, summary_s))
| extend count_ = coalesce(hashMatchCount,yaraMatchCount, fileHashMatchCount), eventname = substring(custom_details_eventName_s,16, strlen(custom_details_eventName_s) - 28)
| where count_ > 0
| summarize arg_max(TimeGenerated,*) by eventname, custom_details_objectId_g, count_

YAML

status: Available
queryFrequency: 10m
queryPeriod: 10m
kind: Scheduled
version: 1.0.0
triggerThreshold: 0
relevantTechniques:
- T1546
description: |
    'Rubrik Threat Monitoring matches Event Name and if match found then generate the incident for each object.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/RubrikSecurityCloud/Analytic Rules/RubrikThreatMonitoring.yaml
customDetails:
  Url: custom_details_url_s
  EventName: custom_details_eventName_s
  ObjectName: custom_details_objectName_s
  ObjectType: custom_details_objectType_s
  ObjectId: custom_details_objectId_g
  Summary: summary_s
  ClusterIdentifier: custom_details_clusterId_g
requiredDataConnectors:
- connectorId: RubrikSecurityCloudAzureFunctions
  dataTypes:
  - RubrikEventsData
id: 0083cbc4-776e-42ca-8694-6950fd605df9
alertDetailsOverride:
  alertDisplayNameFormat: ThreatMonitoring Found {{count_}} {{eventname}} Matches for {{custom_details_objectName_s}}
name: Rubrik Threat Monitoring
triggerOperator: gt
tactics:
- Persistence
eventGroupingSettings:
  aggregationKind: AlertPerResult
query: |
  Rubrik_Events_Data_CL
  | where custom_details_eventName_s endswith "AnalysisMatchesFound" or custom_details_eventName_s contains "ThreatMonitoringHashCatalogAnalysisFailed" or custom_details_eventName_s contains "ThreatMonitoringHashMatchesFound" or custom_details_eventName_s contains "ThreatMonitoringYaraMatchesFound"
  | extend hashMatchCount = toint(extract("Found ([0-9]+) hash matches",1, summary_s)),    yaraMatchCount = toint(extract("Found ([0-9]+) YARA rule matches", 1, summary_s)),    fileHashMatchCount = toint(extract("Found file hash matches for ([0-9]+) files", 1, summary_s))
  | extend count_ = coalesce(hashMatchCount,yaraMatchCount, fileHashMatchCount), eventname = substring(custom_details_eventName_s,16, strlen(custom_details_eventName_s) - 28)
  | where count_ > 0
  | summarize arg_max(TimeGenerated,*) by eventname, custom_details_objectId_g, count_  
incidentConfiguration:
  groupingConfiguration:
    groupByCustomDetails:
    - ObjectName
    - ObjectId
    reopenClosedIncident: false
    lookbackDuration: P7D
    enabled: true
    matchingMethod: Selected
  createIncident: true
severity: Medium

ARM