Dev-0270 WMIC Discovery

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Id	6b652b4f-9810-4eec-9027-7aa88ce4db23
Rulename	Dev-0270 WMIC Discovery
Description	The query below identifies dllhost.exe using WMIC to discover additional hosts and associated domains in the environment.
Severity	High
Tactics	Discovery
Techniques	T1482
Required data connectors	MicrosoftThreatProtection SecurityEvents WindowsSecurityEvents
Kind	Scheduled
Query frequency	6h
Query period	6h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270WMICDiscoverySep2022.yaml
Version	1.0.4
Arm template	6b652b4f-9810-4eec-9027-7aa88ce4db23.json

KQL

(union isfuzzy=true
(SecurityEvent
| where EventID==4688
| where CommandLine has "wmic computersystem get domain" and ParentProcessName has "dllhost.exe"
| project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, EventID, Activity, CommandLine, EventSourceName, Type
),
(DeviceProcessEvents 
| where ProcessCommandLine has "wmic computersystem get domain" and InitiatingProcessFileName =~ "dllhost.exe" and InitiatingProcessCommandLine has "dllhost.exe"
| extend Account = strcat(InitiatingProcessAccountDomain, @'\', InitiatingProcessAccountName), Computer = DeviceName
)
)
| extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
| extend AccountName = tostring(split(Account, @'\')[1]), AccountNTDomain = tostring(split(Account, @'\')[0])

YAML

relevantTechniques:
- T1482
name: Dev-0270 WMIC  Discovery
requiredDataConnectors:
- dataTypes:
  - SecurityEvent
  connectorId: SecurityEvents
- dataTypes:
  - SecurityEvent
  connectorId: WindowsSecurityEvents
- dataTypes:
  - DeviceProcessEvents
  connectorId: MicrosoftThreatProtection
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: Account
  - identifier: Name
    columnName: AccountName
  - identifier: NTDomain
    columnName: AccountNTDomain
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: Computer
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: HostNameDomain
  entityType: Host
triggerThreshold: 0
id: 6b652b4f-9810-4eec-9027-7aa88ce4db23
tactics:
- Discovery
version: 1.0.4
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270WMICDiscoverySep2022.yaml
queryPeriod: 6h
kind: Scheduled
tags:
- Dev-0270
queryFrequency: 6h
severity: High
status: Available
description: |
    'The query below identifies dllhost.exe using WMIC to discover additional hosts and associated domains in the environment.'
query: |
  (union isfuzzy=true
  (SecurityEvent
  | where EventID==4688
  | where CommandLine has "wmic computersystem get domain" and ParentProcessName has "dllhost.exe"
  | project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, EventID, Activity, CommandLine, EventSourceName, Type
  ),
  (DeviceProcessEvents 
  | where ProcessCommandLine has "wmic computersystem get domain" and InitiatingProcessFileName =~ "dllhost.exe" and InitiatingProcessCommandLine has "dllhost.exe"
  | extend Account = strcat(InitiatingProcessAccountDomain, @'\', InitiatingProcessAccountName), Computer = DeviceName
  )
  )
  | extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
  | extend AccountName = tostring(split(Account, @'\')[1]), AccountNTDomain = tostring(split(Account, @'\')[0])  
triggerOperator: gt

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/6b652b4f-9810-4eec-9027-7aa88ce4db23')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/6b652b4f-9810-4eec-9027-7aa88ce4db23')]",
      "properties": {
        "alertRuleTemplateName": "6b652b4f-9810-4eec-9027-7aa88ce4db23",
        "customDetails": null,
        "description": "'The query below identifies dllhost.exe using WMIC to discover additional hosts and associated domains in the environment.'\n",
        "displayName": "Dev-0270 WMIC  Discovery",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Account",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountNTDomain",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "HostNameDomain",
                "identifier": "DnsDomain"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270WMICDiscoverySep2022.yaml",
        "query": "(union isfuzzy=true\n(SecurityEvent\n| where EventID==4688\n| where CommandLine has \"wmic computersystem get domain\" and ParentProcessName has \"dllhost.exe\"\n| project TimeGenerated, Computer, Account, AccountDomain, ProcessName, ProcessNameFullPath = NewProcessName, EventID, Activity, CommandLine, EventSourceName, Type\n),\n(DeviceProcessEvents \n| where ProcessCommandLine has \"wmic computersystem get domain\" and InitiatingProcessFileName =~ \"dllhost.exe\" and InitiatingProcessCommandLine has \"dllhost.exe\"\n| extend Account = strcat(InitiatingProcessAccountDomain, @'\\', InitiatingProcessAccountName), Computer = DeviceName\n)\n)\n| extend HostName = tostring(split(Computer, \".\")[0]), DomainIndex = toint(indexof(Computer, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)\n| extend AccountName = tostring(split(Account, @'\\')[1]), AccountNTDomain = tostring(split(Account, @'\\')[0])\n",
        "queryFrequency": "PT6H",
        "queryPeriod": "PT6H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Discovery"
        ],
        "tags": [
          "Dev-0270"
        ],
        "techniques": [
          "T1482"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}