SUNBURST suspicious SolarWinds child processes Normalized Process Events

Back


Id	631d02df-ab51-46c1-8d72-32d0cfec0720
Rulename	SUNBURST suspicious SolarWinds child processes (Normalized Process Events)
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 To use this analytics rule, make sure you have deployed the ASIM normalization parsers
Severity	Medium
Tactics	Execution Persistence
Techniques	T1059 T1543
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/imProcess_SolarWinds_SUNBURST_Process-IOCs.yaml
Version	1.1.6
Arm template	631d02df-ab51-46c1-8d72-32d0cfec0720.json

KQL

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"]);
imProcessCreate
| where Process hassuffix 'solarwinds.businesslayerhost.exe'
| where not(Process has_any (excludeProcs))
| extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])
| extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
| project-away DomainIndex

YAML

queryPeriod: 1d
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"]);
  imProcessCreate
  | where Process hassuffix 'solarwinds.businesslayerhost.exe'
  | where not(Process has_any (excludeProcs))
  | extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])
  | extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
  | project-away DomainIndex  
name: SUNBURST suspicious SolarWinds child processes (Normalized Process Events)
entityMappings:
- fieldMappings:
  - columnName: ActorUsername
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountNTDomain
    identifier: NTDomain
  entityType: Account
- fieldMappings:
  - columnName: Dvc
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: HostNameDomain
    identifier: DnsDomain
  entityType: Host
- fieldMappings:
  - columnName: AlgorithmType
    identifier: Algorithm
  - columnName: TargetFileMD5
    identifier: Value
  entityType: FileHash
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/imProcess_SolarWinds_SUNBURST_Process-IOCs.yaml
tags:
- Id: 4a3073ac-7383-48a9-90a8-eb6716183a54
  version: 1.0.0
- SchemaVersion: 0.1.0
  Schema: ASIMProcessEvent
- Solorigate
- NOBELIUM
requiredDataConnectors: []
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
  To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'  
kind: Scheduled
version: 1.1.6
metadata:
  author:
    name: Yuval Naor
  categories:
    domains:
    - Security - 0-day Vulnerability
  support:
    tier: Community
  source:
    kind: Community
queryFrequency: 1d
severity: Medium
relevantTechniques:
- T1059
- T1543
triggerOperator: gt
triggerThreshold: 0
tactics:
- Execution
- Persistence
id: 631d02df-ab51-46c1-8d72-32d0cfec0720

ARM