NGINX - Private IP address in URL

Back


Id	1aa6bfed-f11b-402f-9007-0dccc1152ede
Rulename	NGINX - Private IP address in URL
Description	Detects requests to unusual URL
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/NGINX HTTP Server/Analytic Rules/NGINXPrivateIPinUrl.yaml
Version	1.0.2
Arm template	1aa6bfed-f11b-402f-9007-0dccc1152ede.json

KQL

NGINXHTTPServer
| where UrlOriginal matches regex @'(10\.\d{1,3}\.\d{1,3}\.\d{1,3})|(172\.1[6-9]\.\d{1,3}\.\d{1,3})|(172\.2[0-9]\.\d{1,3}\.\d{1,3})|(172\.3[0-1]\.\d{1,3}\.\d{1,3})|(192\.168\.\d{1,3}\.\d{1,3})'
| extend UrlCustomEntity = UrlOriginal

YAML

description: |
    'Detects requests to unusual URL'
version: 1.0.2
triggerThreshold: 0
tactics:
- InitialAccess
queryPeriod: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/NGINX HTTP Server/Analytic Rules/NGINXPrivateIPinUrl.yaml
triggerOperator: gt
status: Available
id: 1aa6bfed-f11b-402f-9007-0dccc1152ede
name: NGINX - Private IP address in URL
queryFrequency: 1h
severity: Medium
kind: Scheduled
entityMappings:
- fieldMappings:
  - columnName: UrlCustomEntity
    identifier: Url
  entityType: URL
relevantTechniques:
- T1190
- T1133
query: |
  NGINXHTTPServer
  | where UrlOriginal matches regex @'(10\.\d{1,3}\.\d{1,3}\.\d{1,3})|(172\.1[6-9]\.\d{1,3}\.\d{1,3})|(172\.2[0-9]\.\d{1,3}\.\d{1,3})|(172\.3[0-1]\.\d{1,3}\.\d{1,3})|(192\.168\.\d{1,3}\.\d{1,3})'
  | extend UrlCustomEntity = UrlOriginal  
requiredDataConnectors:
- dataTypes:
  - NGINX_CL
  connectorId: CustomLogsAma

ARM