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

tactics:
- Impact
requiredDataConnectors:
- connectorId: CTERA
  dataTypes:
  - Syslog
relevantTechniques:
- T1203
suppressionDuration: PT5H
id: 4f767afa-d666-4ed4-b453-a4f5ad35181b
incidentConfiguration:
  groupingConfiguration:
    matchingMethod: AllEntities
    lookbackDuration: PT5H
    enabled: false
    reopenClosedIncident: false
  createIncident: true
name: Antivirus Detected an Infected File
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CTERA/Analytic Rules/InfectedFileDetected.yaml
description: Monitors CTERA platform to detect files infected with viruses identified by the antivirus engine on Edge Filers.
customDetails:
  Portal: Portal
  FilePath: FilePath
  Virus: Virus
  EdgeFiler: EdgeFiler
suppressionEnabled: false
version: 1.0.0
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  
alertDetailsOverride:
  alertDescriptionFormat: Antivirus detected an infected file on {{EdgeFiler}} at {{DetectionTime}}.
  alertnameFormat: Antivirus Detected an Infected File
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: EdgeFiler
  entityType: Host
severity: High
status: Available
eventGroupingSettings:
  aggregationKind: SingleAlert
kind: NRT

ARM