File Share Deleted

Status: available
Severity: high
Time window: 5m
Source: github.com/Azure/Azure-Sentinel

Detects when a file share is deleted from Veeam Backup & Replication. This might indicate unauthorized removal of critical components.

Rule body

id: 7ddaf8ef-b726-408b-b1a7-a7a4f92cbf6d
name: File Share Deleted
description: Detects when a file share is deleted from Veeam Backup & Replication.
  This might indicate unauthorized removal of critical components.
severity: High
status: Available
requiredDataConnectors:
- connectorId: Syslog
  dataTypes:
  - Syslog
- connectorId: SyslogAma
  dataTypes:
  - Syslog
queryFrequency: 5m
queryPeriod: 5m
triggerOperator: gt
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: AlertPerResult
tactics: []
relevantTechniques: []
query: "Veeam_GetSecurityEvents\n| where instanceId == 28920\n| extend Name =  extract(\"\
  Name=\\\"(?<Name>[^\\\"]*)\\\"\", 1, SyslogMessage)\n| project\n    Date = format_datetime(TimeGenerated,\
  \ 'dd.MM.yyyy HH:mm'),\n    DataSource = original_host,\n    EventId = instanceId,\n\
  \    UserName = user,\n    [\"Data SourceName\"] = Name,\n    MessageDetails = Description,\n\
  \    Severity = SeverityDescription"
version: 1.0.1
kind: Scheduled
customDetails:
  Date: Date
  VbrHostName: DataSource
  EventId: EventId
  MessageDetails: MessageDetails
  Severity: Severity

Stages and Predicates

Stage 1: `source`

Veeam_GetSecurityEvents

Stage 2: `where`

| where instanceId == 28920

Stage 3: `extend`

| extend Name =  extract("Name=\"(?<Name>[^\"]*)\"", 1, SyslogMessage)

Stage 4: `project`

| project
    Date = format_datetime(TimeGenerated, 'dd.MM.yyyy HH:mm'),
    DataSource = original_host,
    EventId = instanceId,
    UserName = user,
    ["Data SourceName"] = Name,
    MessageDetails = Description,
    Severity = SeverityDescription

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`instanceId`	eq	`28920`	`field:"instanceId" kind:eq value:"28920"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`Data SourceName`	`project`
`DataSource`	`project`
`Date`	`project`
`EventId`	`project`
`MessageDetails`	`project`
`Severity`	`project`
`UserName`	`project`

File Share Deleted

Rule body

Stages and Predicates

Stage 1: source

Stage 2: where