Cloudflare - Multiple error requests from single source

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Id	ef877d68-755f-4cf1-ac1d-f336e395667c
Rulename	Cloudflare - Multiple error requests from single source
Description	Detects multiple failure requests from single source in short timeframe.
Severity	Low
Tactics	InitialAccess
Techniques	T1190 T1133
Required data connectors	CloudflareDataConnector
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/Cloudflare/Analytic Rules/CloudflareMultipleErrorsSource.yaml
Version	1.0.1
Arm template	ef877d68-755f-4cf1-ac1d-f336e395667c.json

KQL

let threshold = 100;
Cloudflare
| where HttpRequestMethod =~ 'GET'
| summarize err_cnt = count() by SrcIpAddr, bin(TimeGenerated, 5m)
| where err_cnt > threshold

YAML

name: Cloudflare - Multiple error requests from single source
id: ef877d68-755f-4cf1-ac1d-f336e395667c
description: |
    'Detects multiple failure requests from single source in short timeframe.'
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: SrcIpAddr
    identifier: Address
  entityType: IP
version: 1.0.1
triggerOperator: gt
query: |
  let threshold = 100;
  Cloudflare
  | where HttpRequestMethod =~ 'GET'
  | summarize err_cnt = count() by SrcIpAddr, bin(TimeGenerated, 5m)
  | where err_cnt > threshold  
tactics:
- InitialAccess
kind: Scheduled
queryFrequency: 1h
severity: Low
queryPeriod: 1h
requiredDataConnectors:
- dataTypes:
  - Cloudflare
  connectorId: CloudflareDataConnector
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareMultipleErrorsSource.yaml
relevantTechniques:
- T1190
- T1133

ARM