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

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

ARM