Cisco WSA - Internet access from public IP

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Id	4250b050-e1c6-4926-af04-9484bbd7e94f
Rulename	Cisco WSA - Internet access from public IP
Description	Detects internet access from public IP.
Severity	Medium
Tactics	InitialAccess
Techniques	T1189
Required data connectors	SyslogAma
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/CiscoWSA/Analytic Rules/CiscoWSAPublicIPSource.yaml
Version	1.0.2
Arm template	4250b050-e1c6-4926-af04-9484bbd7e94f.json

KQL

let ip_except = dynamic(['127.0.0.2']);    //Add exceptions to this list
CiscoWSAEvent
| where ipv4_is_private(SrcIpAddr) == false
| extend IPCustomEntity = SrcIpAddr

YAML

severity: Medium
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAPublicIPSource.yaml
id: 4250b050-e1c6-4926-af04-9484bbd7e94f
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
kind: Scheduled
status: Available
tactics:
- InitialAccess
queryFrequency: 1h
requiredDataConnectors:
- connectorId: SyslogAma
  datatypes:
  - Syslog
relevantTechniques:
- T1189
version: 1.0.2
description: |
    'Detects internet access from public IP.'
triggerThreshold: 0
query: |
  let ip_except = dynamic(['127.0.0.2']);    //Add exceptions to this list
  CiscoWSAEvent
  | where ipv4_is_private(SrcIpAddr) == false
  | extend IPCustomEntity = SrcIpAddr  
queryPeriod: 1h
name: Cisco WSA - Internet access from public IP

ARM