Antivirus Detected an Infected File

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Id	4f767afa-d666-4ed4-b453-a4f5ad35181b
Rulename	Antivirus Detected an Infected File
Description	Monitors CTERA platform to detect files infected with viruses identified by the antivirus engine on Edge Filers.
Severity	High
Tactics	Impact
Techniques	T1203
Required data connectors	CTERA
Kind	NRT
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CTERA/Analytic Rules/InfectedFileDetected.yaml
Version	1.0.0
Arm template	4f767afa-d666-4ed4-b453-a4f5ad35181b.json

KQL

Syslog
| where SyslogMessage contains "found an infected file"
| extend 
    EdgeFiler = extract("Edge filer (\\w+)", 1, SyslogMessage),
    DetectionTime = extract("found an infected file at ([^ ]+)", 1, SyslogMessage),
    Portal = extract("from portal: (\\w+)", 1, SyslogMessage),
    FilePath = extract("The file path is: ([^\\.]+)", 1, SyslogMessage),
    Virus = extract("The virus is: ([^\\.]+)", 1, SyslogMessage)
| project TimeGenerated, EdgeFiler, DetectionTime, Portal, FilePath, Virus

YAML

name: Antivirus Detected an Infected File
relevantTechniques:
- T1203
id: 4f767afa-d666-4ed4-b453-a4f5ad35181b
suppressionEnabled: false
requiredDataConnectors:
- dataTypes:
  - Syslog
  connectorId: CTERA
eventGroupingSettings:
  aggregationKind: SingleAlert
version: 1.0.0
severity: High
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CTERA/Analytic Rules/InfectedFileDetected.yaml
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: EdgeFiler
  entityType: Host
incidentConfiguration:
  groupingConfiguration:
    reopenClosedIncident: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
    enabled: false
  createIncident: true
suppressionDuration: PT5H
alertDetailsOverride:
  alertDescriptionFormat: Antivirus detected an infected file on {{EdgeFiler}} at {{DetectionTime}}.
  alertnameFormat: Antivirus Detected an Infected File
status: Available
query: |
  Syslog
  | where SyslogMessage contains "found an infected file"
  | extend 
      EdgeFiler = extract("Edge filer (\\w+)", 1, SyslogMessage),
      DetectionTime = extract("found an infected file at ([^ ]+)", 1, SyslogMessage),
      Portal = extract("from portal: (\\w+)", 1, SyslogMessage),
      FilePath = extract("The file path is: ([^\\.]+)", 1, SyslogMessage),
      Virus = extract("The virus is: ([^\\.]+)", 1, SyslogMessage)
  | project TimeGenerated, EdgeFiler, DetectionTime, Portal, FilePath, Virus  
tactics:
- Impact
kind: NRT
description: Monitors CTERA platform to detect files infected with viruses identified by the antivirus engine on Edge Filers.
customDetails:
  FilePath: FilePath
  Portal: Portal
  EdgeFiler: EdgeFiler
  Virus: Virus

ARM