Cisco WSA - Multiple infected files | Microsoft Sentinel Analytic Rules

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Id	93186e3d-5dc2-4a00-a993-fa1448db8734
Rulename	Cisco WSA - Multiple infected files
Description	Detects multiple infected files on same source.
Severity	High
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%20Rules/CiscoWSAMultipleInfectedFiles.yaml
Version	1.0.3
Arm template	93186e3d-5dc2-4a00-a993-fa1448db8734.json

KQL

CiscoWSAEvent
| where isnotempty(AmpFileName)
| where isnotempty(ThreatName)
| summarize count() by SrcIpAddr, SrcUserName, bin(TimeGenerated, 15m)
| where count_ > 1
| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = SrcUserName

YAML

description: |
  'Detects multiple infected files on same source.'
kind: Scheduled
severity: High
id: 93186e3d-5dc2-4a00-a993-fa1448db8734
entityMappings:
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
  entityType: Account
name: Cisco WSA - Multiple infected files
version: 1.0.3
requiredDataConnectors:
- datatypes:
  - Syslog
  connectorId: SyslogAma
queryPeriod: 1h
triggerThreshold: 0
query: |
  CiscoWSAEvent
  | where isnotempty(AmpFileName)
  | where isnotempty(ThreatName)
  | summarize count() by SrcIpAddr, SrcUserName, bin(TimeGenerated, 15m)
  | where count_ > 1
  | extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = SrcUserName
status: Available
tactics:
- InitialAccess
queryFrequency: 1h
relevantTechniques:
- T1189
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic%20Rules/CiscoWSAMultipleInfectedFiles.yaml

ARM