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
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	1.0.3
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

kind: Scheduled
queryPeriod: 6h
description: |
    'The query below identifies dllhost.exe using WMIC to discover additional hosts and associated domains in the environment.'
tactics:
- Discovery
id: 6b652b4f-9810-4eec-9027-7aa88ce4db23
requiredDataConnectors:
- connectorId: SecurityEvents
  dataTypes:
  - SecurityEvent
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceProcessEvents
relevantTechniques:
- T1482
severity: High
version: 1.0.3
tags:
- Dev-0270
status: Available
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: Account
  - identifier: Name
    columnName: AccountName
  - identifier: NTDomain
    columnName: AccountNTDomain
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: Computer
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: HostNameDomain
name: Dev-0270 WMIC  Discovery
triggerOperator: gt
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])  
queryFrequency: 6h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Dev 0270 Detection and Hunting/Analytic Rules/Dev-0270WMICDiscoverySep2022.yaml
triggerThreshold: 0

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-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",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Discovery"
        ],
        "tags": [
          "Dev-0270"
        ],
        "techniques": [
          "T1482"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}