Lateral Movement via DCOM

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Id	50cbf34a-4cdd-45d7-b3f5-8b53a1d0d14f
Rulename	Lateral Movement via DCOM
Description	This query detects a fairly uncommon attack technique using the Windows Distributed Component Object Model (DCOM) to make a remote execution call to another computer system and gain lateral movement throughout the network. Ref: http://thenegative.zone/incident%20response/2017/02/04/MMC20.Application-Lateral-Movement-Analysis.html
Severity	Medium
Tactics	LateralMovement
Techniques	T1021.003
Required data connectors	SecurityEvents WindowsSecurityEvents
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Endpoint Threat Protection Essentials/Analytic Rules/LateralMovementViaDCOM.yaml
Version	1.0.3
Arm template	50cbf34a-4cdd-45d7-b3f5-8b53a1d0d14f.json

KQL

Event
| where EventLog =~ "Microsoft-Windows-Sysmon/Operational" and EventID==1
| parse EventData with * 'CommandLine">' CommandLine "<" * 'ParentCommandLine">' ParentCommandLine "<" *
| where ParentCommandLine =~ "C:\\Windows\\System32\\svchost.exe -k DcomLaunch" and CommandLine =~ "C:\\Windows\\System32\\mmc.exe -Embedding"
| parse EventData with * 'ProcessGuid">' ProcessGuid "<" * 'Image">' Image "<" * 'Description">' Description "<" * 'CurrentDirectory">' CurrentDirectory "<" * 'User">' User "<" * 'LogonGuid">' LogonGuid "<" * 'ParentProcessGuid">' ParentProcessGuid "<" * 'ParentImage">' ParentImage "<" * 'ParentCommandLine">' ParentCommandLine "<" * 'ParentUser">' ParentUser "<" *
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by EventID, Computer, User, ParentImage, ParentProcessGuid, ParentCommandLine, ParentUser, Image, ProcessGuid, CommandLine, Description
| extend HostName = iif(Computer has '.',substring(Computer,0,indexof(Computer,'.')),Computer) , DnsDomain = iif(Computer has '.',substring(Computer,indexof(Computer,'.')+1),'')

YAML

relevantTechniques:
- T1021.003
name: Lateral Movement via DCOM
triggerThreshold: 0
tactics:
- LateralMovement
severity: Medium
id: 50cbf34a-4cdd-45d7-b3f5-8b53a1d0d14f
status: Available
requiredDataConnectors:
- dataTypes:
  - SecurityEvent
  connectorId: SecurityEvents
- dataTypes:
  - SecurityEvent
  connectorId: WindowsSecurityEvents
kind: Scheduled
query: |
  Event
  | where EventLog =~ "Microsoft-Windows-Sysmon/Operational" and EventID==1
  | parse EventData with * 'CommandLine">' CommandLine "<" * 'ParentCommandLine">' ParentCommandLine "<" *
  | where ParentCommandLine =~ "C:\\Windows\\System32\\svchost.exe -k DcomLaunch" and CommandLine =~ "C:\\Windows\\System32\\mmc.exe -Embedding"
  | parse EventData with * 'ProcessGuid">' ProcessGuid "<" * 'Image">' Image "<" * 'Description">' Description "<" * 'CurrentDirectory">' CurrentDirectory "<" * 'User">' User "<" * 'LogonGuid">' LogonGuid "<" * 'ParentProcessGuid">' ParentProcessGuid "<" * 'ParentImage">' ParentImage "<" * 'ParentCommandLine">' ParentCommandLine "<" * 'ParentUser">' ParentUser "<" *
  | summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated) by EventID, Computer, User, ParentImage, ParentProcessGuid, ParentCommandLine, ParentUser, Image, ProcessGuid, CommandLine, Description
  | extend HostName = iif(Computer has '.',substring(Computer,0,indexof(Computer,'.')),Computer) , DnsDomain = iif(Computer has '.',substring(Computer,indexof(Computer,'.')+1),'')  
description: |
  'This query detects a fairly uncommon attack technique using the Windows Distributed Component Object Model (DCOM) to make a remote execution call to another computer system and gain lateral movement throughout the network.
  Ref: http://thenegative.zone/incident%20response/2017/02/04/MMC20.Application-Lateral-Movement-Analysis.html'  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Endpoint Threat Protection Essentials/Analytic Rules/LateralMovementViaDCOM.yaml
triggerOperator: gt
queryPeriod: 1h
queryFrequency: 1h
version: 1.0.3
entityMappings:
- entityType: Process
  fieldMappings:
  - columnName: CommandLine
    identifier: CommandLine
- entityType: Host
  fieldMappings:
  - columnName: Computer
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: DnsDomain
    identifier: DnsDomain
- entityType: Account
  fieldMappings:
  - columnName: User
    identifier: Name

ARM