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

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

ARM