Cloudflare - Empty user agent

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Id	729c6d21-fad9-4a6a-9c7f-482393c95957
Rulename	Cloudflare - Empty user agent
Description	Detects requests where user agent is empty.
Severity	Medium
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/CloudflareEmptyUA.yaml
Version	1.0.1
Arm template	729c6d21-fad9-4a6a-9c7f-482393c95957.json

KQL

Cloudflare
| where isempty(HttpUserAgentOriginal)

YAML

name: Cloudflare - Empty user agent
relevantTechniques:
- T1190
- T1133
id: 729c6d21-fad9-4a6a-9c7f-482393c95957
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareEmptyUA.yaml
requiredDataConnectors:
- dataTypes:
  - Cloudflare
  connectorId: CloudflareDataConnector
version: 1.0.1
severity: Medium
triggerThreshold: 0
queryPeriod: 1h
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
  entityType: IP
queryFrequency: 1h
status: Available
query: |
  Cloudflare
  | where isempty(HttpUserAgentOriginal)  
tactics:
- InitialAccess
kind: Scheduled
description: |
    'Detects requests where user agent is empty.'
triggerOperator: gt

ARM