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

ARM