TLS Certificate Hostname Mismatch

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Id	69761091-1a9a-49a9-8966-be68cd550766
Rulename	TLS Certificate Hostname Mismatch
Description	TLS Certificate Hostname Mismatch
Severity	Medium
Tactics	CredentialAccess DefenseEvasion Persistence
Techniques	T1556
Required data connectors	HVPollingIDAzureFunctions
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CTM360/Analytic Rules/TLSCertificateHostnameMismatch.yaml
Version	1.0.3
Arm template	69761091-1a9a-49a9-8966-be68cd550766.json

KQL

HackerViewLog_Azure_1_CL | where severity_s == "medium" | where progress_status_s == "New" | where status_s != "inactive"  | where issue_name_s == "TLS Certificate Hostname Mismatch"

YAML

status: Available
query: 'HackerViewLog_Azure_1_CL | where severity_s == "medium" | where progress_status_s == "New" | where status_s != "inactive"  | where issue_name_s == "TLS Certificate Hostname Mismatch" '
version: 1.0.3
name: TLS Certificate Hostname Mismatch
queryPeriod: 5m
kind: Scheduled
id: 69761091-1a9a-49a9-8966-be68cd550766
suppressionDuration: 5h
triggerOperator: gt
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    reopenClosedIncident: false
    enabled: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
relevantTechniques:
- T1556
tactics:
- CredentialAccess
- DefenseEvasion
- Persistence
eventGroupingSettings:
  aggregationKind: SingleAlert
severity: Medium
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CTM360/Analytic Rules/TLSCertificateHostnameMismatch.yaml
queryFrequency: 5m
entityMappings:
- fieldMappings:
  - columnName: meta_resolved_ip_s
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: meta_host_s
    identifier: HostName
  entityType: Host
- fieldMappings:
  - columnName: hackerview_link_s
    identifier: Url
  entityType: URL
requiredDataConnectors:
- dataTypes:
  - HackerViewLog_Azure_1_CL
  connectorId: HVPollingIDAzureFunctions
description: |
    'TLS Certificate Hostname Mismatch'
suppressionEnabled: false

ARM