Apache - Multiple client errors from single IP

Back


Id	15f5a956-3af9-11ec-8d3d-0242ac130003
Rulename	Apache - Multiple client errors from single IP
Description	Detects multiple client errors from one source in short timeframe
Severity	Medium
Tactics	InitialAccess
Techniques	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/ApacheMultipleClientErrorsFromSingleIP.yaml
Version	1.0.3
Arm template	15f5a956-3af9-11ec-8d3d-0242ac130003.json

KQL

let threshold = 100;
ApacheHTTPServer
| where HttpStatusCode >= 400 and HttpStatusCode <= 499
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleClientErrors > threshold
| extend IPCustomEntity = SrcIpAddr

YAML

status: Available
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheMultipleClientErrorsFromSingleIP.yaml
version: 1.0.3
tactics:
- InitialAccess
id: 15f5a956-3af9-11ec-8d3d-0242ac130003
name: Apache - Multiple client errors from single IP
relevantTechniques:
- T1190
- T1133
severity: Medium
description: |
    'Detects multiple client errors from one source in short timeframe'
triggerOperator: gt
requiredDataConnectors:
- datatypes:
  - ApacheHTTPServer_CL
  connectorId: CustomLogsAma
kind: Scheduled
query: |
  let threshold = 100;
  ApacheHTTPServer
  | where HttpStatusCode >= 400 and HttpStatusCode <= 499
  | summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
  | where MultipleClientErrors > threshold
  | extend IPCustomEntity = SrcIpAddr  
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
queryPeriod: 1h

ARM