Apache - Apache 2449 flaw CVE-2021-41773

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Id	767f9dc4-3b01-11ec-8d3d-0242ac130003
Rulename	Apache - Apache 2.4.49 flaw CVE-2021-41773
Description	Detects using Apache 2.4.49 flaw CVE-2021-41773
Severity	High
Tactics	InitialAccess LateralMovement
Techniques	T1190 T1133 T1210
Required data connectors	CustomLogsAma
Kind	Scheduled
Query frequency	10m
Query period	10m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheCVE-2021-41773.yaml
Version	1.0.3
Arm template	767f9dc4-3b01-11ec-8d3d-0242ac130003.json

KQL

ApacheHTTPServer
| where HttpRequestMethod =~ "GET"
| where UrlOriginal has_all ("/cgi-bin/", "/%2e%2e/")
| where HttpStatusCode == "200" 
| extend UrlCustomEntity = UrlOriginal

YAML

name: Apache - Apache 2.4.49 flaw CVE-2021-41773
id: 767f9dc4-3b01-11ec-8d3d-0242ac130003
description: |
    'Detects using Apache 2.4.49 flaw CVE-2021-41773'
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: UrlCustomEntity
    identifier: Url
  entityType: URL
version: 1.0.3
triggerOperator: gt
query: |
  ApacheHTTPServer
  | where HttpRequestMethod =~ "GET"
  | where UrlOriginal has_all ("/cgi-bin/", "/%2e%2e/")
  | where HttpStatusCode == "200" 
  | extend UrlCustomEntity = UrlOriginal  
tactics:
- InitialAccess
- LateralMovement
kind: Scheduled
queryFrequency: 10m
severity: High
queryPeriod: 10m
requiredDataConnectors:
- datatypes:
  - ApacheHTTPServer_CL
  connectorId: CustomLogsAma
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ApacheHTTPServer/Analytic Rules/ApacheCVE-2021-41773.yaml
relevantTechniques:
- T1190
- T1133
- T1210

ARM