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

status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheMultipleServerErrorsRequestsFromSingleIP.yaml
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  
requiredDataConnectors:
- datatypes:
  - ApacheHTTPServer_CL
  connectorId: CustomLogsAma
tactics:
- Impact
- InitialAccess
name: Apache - Multiple server errors from single IP
relevantTechniques:
- T1498
- T1190
- T1133
severity: Medium
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
kind: Scheduled
queryFrequency: 1h
description: |
    'Detects multiple server errors from one source in short timeframe'
triggerThreshold: 0
triggerOperator: gt
version: 1.0.3
queryPeriod: 1h
id: 1bf246a2-3af9-11ec-8d3d-0242ac130003

ARM