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	1.0.0
Arm template	729c6d21-fad9-4a6a-9c7f-482393c95957.json

KQL

Cloudflare
| where isempty(HttpUserAgentOriginal)
| extend IPCustomEntity = SrcIpAddr

YAML

description: |
    'Detects requests where user agent is empty.'
kind: Scheduled
tactics:
- InitialAccess
requiredDataConnectors:
- connectorId: CloudflareDataConnector
  dataTypes:
  - Cloudflare
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cloudflare/Analytic Rules/CloudflareEmptyUA.yaml
severity: Medium
name: Cloudflare - Empty user agent
triggerThreshold: 0
queryPeriod: 1h
query: |
  Cloudflare
  | where isempty(HttpUserAgentOriginal)
  | extend IPCustomEntity = SrcIpAddr  
relevantTechniques:
- T1190
- T1133
id: 729c6d21-fad9-4a6a-9c7f-482393c95957
queryFrequency: 1h
status: Available
triggerOperator: gt
version: 1.0.0
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address

ARM