Cisco WSA - Access to unwanted site

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Id	38029e86-030c-46c4-8a91-a2be7c74d74c
Rulename	Cisco WSA - Access to unwanted site
Description	Detects when users attempting to access sites from high risk category.
Severity	High
Tactics	InitialAccess
Techniques	T1566
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/CiscoWSAAccessToUnwantedSite.yaml
Version	1.0.3
Arm template	38029e86-030c-46c4-8a91-a2be7c74d74c.json

KQL

let risky_sites = dynamic(['IW_adlt', 'IW_hack', 'IW_porn']);
CiscoWSAEvent
| where UrlCategory in~ (risky_sites)
| where DvcAction =~ 'DEFAULT_CASE'
| extend AccountCustomEntity = SrcUserName

YAML

tactics:
- InitialAccess
triggerThreshold: 0
queryPeriod: 1h
id: 38029e86-030c-46c4-8a91-a2be7c74d74c
query: |
  let risky_sites = dynamic(['IW_adlt', 'IW_hack', 'IW_porn']);
  CiscoWSAEvent
  | where UrlCategory in~ (risky_sites)
  | where DvcAction =~ 'DEFAULT_CASE'
  | extend AccountCustomEntity = SrcUserName  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAAccessToUnwantedSite.yaml
queryFrequency: 1h
relevantTechniques:
- T1566
description: |
    'Detects when users attempting to access sites from high risk category.'
name: Cisco WSA - Access to unwanted site
status: Available
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: AccountCustomEntity
requiredDataConnectors:
- connectorId: SyslogAma
  datatypes:
  - Syslog
triggerOperator: gt
severity: High
kind: Scheduled
version: 1.0.3

ARM