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

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

ARM