Apache - Multiple server errors from single IP

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Id	1bf246a2-3af9-11ec-8d3d-0242ac130003
Rulename	Apache - Multiple server errors from single IP
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/ApacheHTTPServer/Analytic Rules/ApacheMultipleServerErrorsRequestsFromSingleIP.yaml
Version	1.0.3
Arm template	1bf246a2-3af9-11ec-8d3d-0242ac130003.json

KQL

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

YAML

queryPeriod: 1h
query: |
  let threshold = 100;
  ApacheHTTPServer
  | where HttpStatusCode >= 500 and HttpStatusCode <= 599 
  | summarize MultipleServerErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
  | where MultipleServerErrors > threshold
  | extend IPCustomEntity = SrcIpAddr  
name: Apache - Multiple server errors from single IP
entityMappings:
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheMultipleServerErrorsRequestsFromSingleIP.yaml
requiredDataConnectors:
- connectorId: CustomLogsAma
  datatypes:
  - ApacheHTTPServer_CL
description: |
    'Detects multiple server errors from one source in short timeframe'
kind: Scheduled
version: 1.0.3
status: Available
severity: Medium
relevantTechniques:
- T1498
- T1190
- T1133
triggerOperator: gt
triggerThreshold: 0
tactics:
- Impact
- InitialAccess
id: 1bf246a2-3af9-11ec-8d3d-0242ac130003

ARM