Cisco WSA - Multiple errors to URL

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Id	1db49647-435c-41ad-bf8c-7130ba75429d
Rulename	Cisco WSA - Multiple errors to URL
Description	Detects multiple connection errors to URL.
Severity	Medium
Tactics	CommandAndControl
Techniques	T1102
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/CiscoWSAMultipleErrorsToUrl.yaml
Version	1.0.2
Arm template	1db49647-435c-41ad-bf8c-7130ba75429d.json

KQL

let threshold = 5;
CiscoWSAEvent
| where DvcAction =~ 'NONE'
| summarize count() by SrcUserName, UrlOriginal, bin(TimeGenerated, 5m)
| where count_ >= threshold
| extend URLCustomEntity = UrlOriginal, AccountCustomEntity = SrcUserName

YAML

query: |
  let threshold = 5;
  CiscoWSAEvent
  | where DvcAction =~ 'NONE'
  | summarize count() by SrcUserName, UrlOriginal, bin(TimeGenerated, 5m)
  | where count_ >= threshold
  | extend URLCustomEntity = UrlOriginal, AccountCustomEntity = SrcUserName  
entityMappings:
- entityType: URL
  fieldMappings:
  - columnName: URLCustomEntity
    identifier: Url
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
triggerThreshold: 0
name: Cisco WSA - Multiple errors to URL
severity: Medium
relevantTechniques:
- T1102
queryPeriod: 1h
tactics:
- CommandAndControl
requiredDataConnectors:
- connectorId: SyslogAma
  datatypes:
  - Syslog
queryFrequency: 1h
version: 1.0.2
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAMultipleErrorsToUrl.yaml
id: 1db49647-435c-41ad-bf8c-7130ba75429d
kind: Scheduled
description: |
    'Detects multiple connection errors to URL.'
status: Available
triggerOperator: gt

ARM