Cloudflare - Empty user agent

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Id	729c6d21-fad9-4a6a-9c7f-482393c95958
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 CCF/Analytic Rules/CloudflareCCFEmptyUA.yaml
Version	1.0.1
Arm template	729c6d21-fad9-4a6a-9c7f-482393c95958.json

KQL

Cloudflare
| where isempty(HttpUserAgentOriginal)

YAML

kind: Scheduled
severity: Medium
description: |
    'Detects requests where user agent is empty.'
triggerThreshold: 0
status: Available
query: |
  Cloudflare
  | where isempty(HttpUserAgentOriginal)  
relevantTechniques:
- T1190
- T1133
version: 1.0.1
triggerOperator: gt
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
  entityType: IP
requiredDataConnectors:
- connectorId: CloudflareDataConnector
  dataTypes:
  - Cloudflare
queryPeriod: 1h
tactics:
- InitialAccess
name: Cloudflare - Empty user agent
queryFrequency: 1h
id: 729c6d21-fad9-4a6a-9c7f-482393c95958
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare CCF/Analytic Rules/CloudflareCCFEmptyUA.yaml

ARM