Malware Activity Detected

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

Detects when restore points marked as suspicious. This might indicate potential compromise of backup data.

Rule body

id: 9a7c80ef-8dc2-4b07-834d-b9ca18d603f7
name: Malware Activity Detected
description: Detects when restore points marked as suspicious. This might indicate
  potential compromise of backup data.
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
  | where instanceId == 41600
  | extend ActivityType = extract("ActivityType=\"([^\"]*)\"", 1, SyslogMessage)
  | extend MachineDisplayName = extract("[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\\s*\\(([^)]+)\\)", 1, Description)
  | extend MachineUuid = extract("([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})", 1, Description)
  | project
      Date = format_datetime(TimeGenerated, 'dd.MM.yyyy HH:mm'),
      DataSource = original_host,
      EventId = instanceId,
      UserName = user,
      ["Malware Detection Method"] = ActivityType,
      MessageDetails = Description,
      Severity = SeverityDescription,
      MachineDisplayName,
      MachineUuid
version: 1.0.2
kind: Scheduled
customDetails:
  Date: Date
  VbrHostName: DataSource
  EventId: EventId
  MessageDetails: MessageDetails
  Severity: Severity
  MachineDisplayName: MachineDisplayName
  MachineUuid: MachineUuid

Stages and Predicates

Stage 1: `source`

Veeam_GetSecurityEvents

Stage 2: `where`

| where instanceId == 41600

Stage 3: `extend` (3 consecutive steps)

| extend ActivityType = extract("ActivityType=\"([^\"]*)\"", 1, SyslogMessage)
| extend MachineDisplayName = extract("[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\\s*\\(([^)]+)\\)", 1, Description)
| extend MachineUuid = extract("([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12})", 1, Description)

Stage 4: `project`

| project
    Date = format_datetime(TimeGenerated, 'dd.MM.yyyy HH:mm'),
    DataSource = original_host,
    EventId = instanceId,
    UserName = user,
    ["Malware Detection Method"] = ActivityType,
    MessageDetails = Description,
    Severity = SeverityDescription,
    MachineDisplayName,
    MachineUuid

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`instanceId`	eq	`41600`	`field:"instanceId" kind:eq value:"41600"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`DataSource`	`project`
`Date`	`project`
`EventId`	`project`
`MachineDisplayName`	`project`
`MachineUuid`	`project`
`Malware Detection Method`	`project`
`MessageDetails`	`project`
`Severity`	`project`
`UserName`	`project`

Malware Activity Detected

Rule body

Stages and Predicates

Stage 1: source

Stage 2: where