Tomcat - Multiple server errors from single IP address

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Id	de9df79c-4872-11ec-81d3-0242ac130003
Rulename	Tomcat - Multiple server errors from single IP address
Description	Detects multiple server errors from one source in short timeframe
Severity	Medium
Tactics	Impact InitialAccess
Techniques	T1498 T1190 T1133
Required data connectors	CustomLogsAma
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Tomcat/Analytic Rules/TomcatMultipleServerErrorsFromSingleIP.yaml
Version	1.0.2
Arm template	de9df79c-4872-11ec-81d3-0242ac130003.json

KQL

let threshold = 100;
TomcatEvent
| where HttpStatusCode >= 500 and HttpStatusCode <= 599 
| summarize MultipleServerErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleServerErrors > threshold
| extend IPCustomEntity = SrcIpAddr

YAML

description: |
    'Detects multiple server errors from one source in short timeframe'
kind: Scheduled
tactics:
- Impact
- InitialAccess
requiredDataConnectors:
- connectorId: CustomLogsAma
  datatypes:
  - Tomcat_CL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Tomcat/Analytic Rules/TomcatMultipleServerErrorsFromSingleIP.yaml
severity: Medium
name: Tomcat - Multiple server errors from single IP address
triggerThreshold: 0
queryPeriod: 1h
query: |
  let threshold = 100;
  TomcatEvent
  | where HttpStatusCode >= 500 and HttpStatusCode <= 599 
  | summarize MultipleServerErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
  | where MultipleServerErrors > threshold
  | extend IPCustomEntity = SrcIpAddr  
relevantTechniques:
- T1498
- T1190
- T1133
id: de9df79c-4872-11ec-81d3-0242ac130003
queryFrequency: 1h
status: Available
triggerOperator: gt
version: 1.0.2
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address

ARM