Cloudflare - Multiple error requests from single source

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Id	ef877d68-755f-4cf1-ac1d-f336e395667d
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 CCF/Analytic Rules/CloudflareCCFMultipleErrorsSource.yaml
Version	1.0.1
Arm template	ef877d68-755f-4cf1-ac1d-f336e395667d.json

KQL

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

YAML

requiredDataConnectors:
- dataTypes:
  - Cloudflare
  connectorId: CloudflareDataConnector
queryPeriod: 1h
triggerThreshold: 0
queryFrequency: 1h
version: 1.0.1
status: Available
severity: Low
description: |
    'Detects multiple failure requests from single source in short timeframe.'
name: Cloudflare - Multiple error requests from single source
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
  entityType: IP
triggerOperator: gt
id: ef877d68-755f-4cf1-ac1d-f336e395667d
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare CCF/Analytic Rules/CloudflareCCFMultipleErrorsSource.yaml
tactics:
- InitialAccess
relevantTechniques:
- T1190
- T1133
kind: Scheduled
query: |
  let threshold = 100;
  Cloudflare
  | where HttpRequestMethod =~ 'GET'
  | summarize err_cnt = count() by SrcIpAddr, bin(TimeGenerated, 5m)
  | where err_cnt > threshold

ARM