Tomcat - Multiple empty requests from same IP
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 | ApacheTomcat 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 | 1.0.1 |
Arm template | 7c9a1026-4872-11ec-81d3-0242ac130003.json |
let threshold = 50;
TomcatEvent
| where HttpResponseBodyBytes == 0
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleClientErrors > threshold
| extend IPCustomEntity = SrcIpAddr
kind: Scheduled
relevantTechniques:
- T1190
- T1133
- T1499
description: |
'Detects multiple empty requests from same IP'
queryPeriod: 1h
queryFrequency: 1h
tactics:
- InitialAccess
- Impact
name: Tomcat - Multiple empty requests from same IP
requiredDataConnectors:
- connectorId: ApacheTomcat
dataTypes:
- TomcatEvent
- connectorId: CustomLogsAma
datatypes:
- Tomcat_CL
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
triggerThreshold: 0
version: 1.0.1
id: 7c9a1026-4872-11ec-81d3-0242ac130003
query: |
let threshold = 50;
TomcatEvent
| where HttpResponseBodyBytes == 0
| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where MultipleClientErrors > threshold
| extend IPCustomEntity = SrcIpAddr
status: Available
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Tomcat/Analytic Rules/TomcatMultipleEmptyRequestsFromSameIP.yaml
severity: Medium
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2024-01-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/7c9a1026-4872-11ec-81d3-0242ac130003')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/7c9a1026-4872-11ec-81d3-0242ac130003')]",
"properties": {
"alertRuleTemplateName": "7c9a1026-4872-11ec-81d3-0242ac130003",
"customDetails": null,
"description": "'Detects multiple empty requests from same IP'\n",
"displayName": "Tomcat - Multiple empty requests from same IP",
"enabled": true,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Tomcat/Analytic Rules/TomcatMultipleEmptyRequestsFromSameIP.yaml",
"query": "let threshold = 50;\nTomcatEvent\n| where HttpResponseBodyBytes == 0\n| summarize MultipleClientErrors = count() by SrcIpAddr, bin(TimeGenerated, 5m)\n| where MultipleClientErrors > threshold\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Impact",
"InitialAccess"
],
"techniques": [
"T1133",
"T1190",
"T1499"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}