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

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

ARM