kqlMITfrom Azure/Azure-Sentinel

SUNBURST suspicious SolarWinds child processes

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

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Rule sourceDetections/DeviceProcessEvents/SolarWinds_SUNBURST_Process-IOCs.yaml

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"