Microsoft Sentinel Analytic Rules
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API - Invalid host access

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Id28500be7-cfcf-40e1-bad4-bc524e9283e2
RulenameAPI - Invalid host access
Description42Crunch API protection against invalid host access
SeverityLow
TacticsReconnaissance
TechniquesT1592
Required data connectors42CrunchAPIProtection
KindScheduled
Query frequency5m
Query period5m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch API Protection/Analytic Rules/APIInvalidHostAccess.yaml
Version1.0.1
Arm template28500be7-cfcf-40e1-bad4-bc524e9283e2.json
Deploy To Azure
apifirewall_log_1_CL 
| where TimeGenerated >= ago(5m) 
| where Error_Step_s has "hostpath_mapping" 
| project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Response_Header_s, Request_Header_s, Errors_s, Type, UUID_g 
| sort by TimeGenerated desc 
description: |
    '42Crunch API protection against invalid host access'
kind: Scheduled
tactics:
- Reconnaissance
requiredDataConnectors:
- connectorId: 42CrunchAPIProtection
  dataTypes:
  - apifirewall_log_1_CL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch API Protection/Analytic Rules/APIInvalidHostAccess.yaml
severity: Low
name: API - Invalid host access
customDetails: 
triggerThreshold: 0
queryPeriod: 5m
query: |
  apifirewall_log_1_CL 
  | where TimeGenerated >= ago(5m) 
  | where Error_Step_s has "hostpath_mapping" 
  | project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Response_Header_s, Request_Header_s, Errors_s, Type, UUID_g 
  | sort by TimeGenerated desc   
relevantTechniques:
- T1592
id: 28500be7-cfcf-40e1-bad4-bc524e9283e2
queryFrequency: 5m
status: Available
version: 1.0.1
triggerOperator: gt
eventGroupingSettings:
  aggregationKind: SingleAlert
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: Source_IP_s
    identifier: Address
- entityType: Host
  fieldMappings:
  - columnName: Hostname_s
    identifier: HostName
- entityType: Account
  fieldMappings:
  - columnName: Instance_Name_s
    identifier: FullName