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NetLogon Secure Channel Noncompliant Device Rule

OpsLogix.NetLogon.RPC.NonCompliantDeviceEvents.Alert.Rule (Rule)

This rule alerts on NetLogon vulnerable connection events (ID 5829) in the System eventlog on Domain Controllers

Knowledge Base article:

Summary

NetLogon Secure Channel Connection is vulnerable according to CVE-2020-1472

Causes

A Domain Controller allowed a vulnerable NetLogon request from a noncompliant device

Resolution

Identify the noncompliant device and take appropriate actions to make it compliant

Element properties:

TargetOpsLogix.NetLogon.RPC.DomainController.Class
CategoryCustom
EnabledFalse
Event_ID5829
Event SourceNetlogon
Alert GenerateTrue
Alert SeverityWarning
Alert PriorityNormal
RemotableTrue
Alert Message
NetLogon Secure Channel Connection Is Vulnerable
{0}
Event LogSystem

Member Modules:

ID Module Type TypeId RunAs 
DS DataSource Microsoft.Windows.EventProvider Default
GenerateAlert WriteAction System.Health.GenerateAlert Default

Source Code:

<Rule ID="OpsLogix.NetLogon.RPC.NonCompliantDeviceEvents.Alert.Rule" Target="OpsLogix.NetLogon.RPC.DomainController.Class" Enabled="false">

  <Category>Custom</Category>

  <DataSources>

    <DataSource ID="DS" TypeID="Windows!Microsoft.Windows.EventProvider">

      <ComputerName>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>

      <LogName>System</LogName>

      <Expression>

        <And>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery Type="String">PublisherName</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value Type="String">Netlogon</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery Type="UnsignedInteger">EventDisplayNumber</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value Type="UnsignedInteger">5829</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

        </And>

      </Expression>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="GenerateAlert" TypeID="Health!System.Health.GenerateAlert">

      <Priority>1</Priority>

      <Severity>1</Severity>

      <AlertMessageId>$MPElement[Name="OpsLogix.NetLogon.RPC.NonCompliantDeviceEvents.Alert.Rule.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>$Data/EventDescription$</AlertParameter1>

      </AlertParameters>

      <Suppression>

        <SuppressionValue>$Data/Params/Param[1]$</SuppressionValue>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>