Detection rules › Kusto
Tomcat - Multiple empty requests from same IP
'Detects multiple empty requests from same IP'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | |
| Impact |
Rule body
id: 7c9a1026-4872-11ec-81d3-0242ac130003
name: Tomcat - Multiple empty requests from same IP
description: |
'Detects multiple empty requests from same IP'
severity: Medium
status: Available
requiredDataConnectors:
- connectorId: CustomLogsAma
datatypes:
- Tomcat_CL
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- InitialAccess
- Impact
relevantTechniques:
- T1190
- T1133
- T1499
query: |
let threshold = 50;
TomcatEvent
| where HttpResponseBodyBytes == 0
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleClientErrors > threshold
| extend IPCustomEntity = SrcIpAddr
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
version: 1.0.2
kind: Scheduled
Stages and Predicates
Parameters
let threshold = 50;
Stage 1: source
TomcatEvent
Stage 2: where
| where HttpResponseBodyBytes == 0
Stage 3: summarize
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
Stage 4: where
| where MultipleClientErrors > threshold
Stage 5: extend
| extend IPCustomEntity = SrcIpAddr
Indicators
These rows show field, operator, and value matches.
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
MultipleClientErrors | summarize |
SrcIpAddr | summarize |
IPCustomEntity | extend |