Corelight - External Proxy Detected

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Id	05850746-9ae4-412f-838b-844f0903f4a9
Rulename	Corelight - External Proxy Detected
Description	Detects external proxy usage.
Severity	Low
Tactics	DefenseEvasion CommandAndControl
Techniques	T1090
Required data connectors	Corelight
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/Corelight/Analytic Rules/CorelightExternalProxyDetected.yaml
Version	2.1.0
Arm template	05850746-9ae4-412f-838b-844f0903f4a9.json

KQL

corelight_http
| where isnotempty(proxied)
| where not(ipv4_is_private(id_orig_h))

YAML

name: Corelight - External Proxy Detected
id: 05850746-9ae4-412f-838b-844f0903f4a9
description: |
    'Detects external proxy usage.'
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: id_orig_h
    identifier: Address
  entityType: IP
version: 2.1.0
triggerOperator: gt
query: |
  corelight_http
  | where isnotempty(proxied)
  | where not(ipv4_is_private(id_orig_h))  
tactics:
- DefenseEvasion
- CommandAndControl
kind: Scheduled
queryFrequency: 1h
severity: Low
queryPeriod: 1h
requiredDataConnectors:
- dataTypes:
  - Corelight_v2_http
  - corelight_http
  connectorId: Corelight
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Corelight/Analytic Rules/CorelightExternalProxyDetected.yaml
relevantTechniques:
- T1090

ARM