SUNBURST suspicious SolarWinds child processes

id: 4a3073ac-7383-48a9-90a8-eb6716183a54
name: SUNBURST suspicious SolarWinds child processes
description: |
  Identifies suspicious child processes of SolarWinds.Orion.Core.BusinessLayer.dll that may be evidence of the SUNBURST backdoor
  References:
  - https://www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-leverages-solarwinds-supply-chain-compromises-with-sunburst-backdoor.html
  - https://gist.github.com/olafhartong/71ffdd4cab4b6acd5cbcd1a0691ff82f
severity: Medium
requiredDataConnectors:
  - connectorId: MicrosoftThreatProtection
    dataTypes:
      - DeviceProcessEvents
queryFrequency: 1d
queryPeriod: 1d
triggerOperator: gt
triggerThreshold: 0
tactics:
  - Execution
  - Persistence
tags:
  - Solorigate
  - NOBELIUM
query:  |
  let excludeProcs = dynamic([@"\SolarWinds\Orion\APM\APMServiceControl.exe", @"\SolarWinds\Orion\ExportToPDFCmd.Exe", @"\SolarWinds.Credentials\SolarWinds.Credentials.Orion.WebApi.exe", @"\SolarWinds\Orion\Topology\SolarWinds.Orion.Topology.Calculator.exe", @"\SolarWinds\Orion\Database-Maint.exe", @"\SolarWinds.Orion.ApiPoller.Service\SolarWinds.Orion.ApiPoller.Service.exe", @"\Windows\SysWOW64\WerFault.exe"]);
  DeviceProcessEvents
  | where InitiatingProcessFileName =~ "solarwinds.businesslayerhost.exe"
  | where not(FolderPath has_any (excludeProcs))
  | extend
      timestamp = TimeGenerated,
      InitiatingProcessAccountUPNSuffix = tostring(split(InitiatingProcessAccountUpn, "@")[1]),
      Algorithm = "MD5"
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: Name
        columnName: InitiatingProcessAccountName
      - identifier: NTDomain
        columnName: InitiatingProcessAccountDomain
      - identifier: Sid
        columnName: InitiatingProcessAccountSid
  - entityType: Host
    fieldMappings:
      - identifier: HostName
        columnName: DeviceName
  - entityType: FileHash
    fieldMappings:
      - identifier: Algorithm
        columnName: Algorithm
      - identifier: Value
        columnName: MD5
version: 1.0.4
kind: Scheduled
metadata:
    source:
        kind: Community
    author:
        name: pemontto
    support:
        tier: Community
    categories:
        domains: [ "Security - Threat Protection" ]