Tomcat - Multiple empty requests from same IP

Back


Id	7c9a1026-4872-11ec-81d3-0242ac130003
Rulename	Tomcat - Multiple empty requests from same IP
Description	Detects multiple empty requests from same IP
Severity	Medium
Tactics	InitialAccess Impact
Techniques	T1190 T1133 T1499
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/TomcatMultipleEmptyRequestsFromSameIP.yaml
Version	1.0.2
Arm template	7c9a1026-4872-11ec-81d3-0242ac130003.json

KQL

let threshold = 50;
TomcatEvent
| where HttpResponseBodyBytes == 0
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleClientErrors > threshold
| extend IPCustomEntity = SrcIpAddr

YAML

relevantTechniques:
- T1190
- T1133
- T1499
entityMappings:
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
triggerThreshold: 0
description: |
    'Detects multiple empty requests from same IP'
requiredDataConnectors:
- connectorId: CustomLogsAma
  datatypes:
  - Tomcat_CL
triggerOperator: gt
version: 1.0.2
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Tomcat/Analytic Rules/TomcatMultipleEmptyRequestsFromSameIP.yaml
id: 7c9a1026-4872-11ec-81d3-0242ac130003
queryFrequency: 1h
query: |
  let threshold = 50;
  TomcatEvent
  | where HttpResponseBodyBytes == 0
  | summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
  | where MultipleClientErrors > threshold
  | extend IPCustomEntity = SrcIpAddr  
severity: Medium
status: Available
queryPeriod: 1h
name: Tomcat - Multiple empty requests from same IP
tactics:
- InitialAccess
- Impact
kind: Scheduled

ARM