Cyble Vision Alerts Discovered Subdomain

Back


Id	7a0f79cc-8d28-44b5-ac1e-6176565bb7b8
Rulename	Cyble Vision Alerts Discovered Subdomain
Description	Triggers when a new subdomain is detected for a monitored keyword/domain.
Severity	Low
Tactics	Reconnaissance
Techniques	T1595
Required data connectors	CybleVisionAlerts
Kind	Scheduled
Query frequency	30m
Query period	30m
Trigger threshold	0
Trigger operator	GreaterThan
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyble Vision/Analytic Rules/Alerts_subdomains_rule.yaml
Version	1.0.0
Arm template	7a0f79cc-8d28-44b5-ac1e-6176565bb7b8.json

KQL

Alerts_subdomains  
| where Service == "subdomains" 
| extend MappedSeverity = Severity

YAML

customDetails:
  SD_EntityID: EntityID
  Status: Status
  SD_Subdomain: SD_Subdomain
  AlertID: AlertID
  Service: Service
  SD_BucketName: BucketName
  SD_KeywordName: KeywordName
  MappedSeverity: Severity
kind: Scheduled
severity: Low
description: |
    'Triggers when a new subdomain is detected for a monitored keyword/domain.'
triggerOperator: GreaterThan
status: Available
enabled: true
query: |
  Alerts_subdomains  
  | where Service == "subdomains" 
  | extend MappedSeverity = Severity  
triggerThreshold: 0
relevantTechniques:
- T1595
version: 1.0.0
queryfrequency: 30m
entityMappings:
- fieldMappings:
  - identifier: DomainName
    columnName: SD_Subdomain
  entityType: DNS
requiredDataConnectors:
- connectorId: CybleVisionAlerts
  dataTypes:
  - CybleVisionAlerts_CL
queryPeriod: 30m
tactics:
- Reconnaissance
name: Cyble Vision Alerts Discovered Subdomain
id: 7a0f79cc-8d28-44b5-ac1e-6176565bb7b8
eventGroupingSettings:
  aggregationKind: AlertPerResult
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyble Vision/Analytic Rules/Alerts_subdomains_rule.yaml
incidentConfiguration:
  alertDisplayNameFormat: New Subdomain Detected {{SD_Subdomain}}
  alertDetailsOverride: 
  alertDescriptionFormat: |
        A new subdomain was discovered for monitored domain/keyword. Keyword {{SD_KeywordName}} Bucket {{SD_BucketName}} Severity {{MappedSeverity}} This may represent new attack surface exposure or infrastructure expansion.
  groupingConfiguration:
    matchingMethod: AllEntities
    enabled: false
    reopenClosedIncident: false
    lookbackDuration: PT5H
  createIncident: true

ARM