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

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

ARM