Security Monitoring Forwarded Events: A suspicious process creation (registry) was executed

SecurityMonitoringMP.ForwardedEvents.4688.SuspiciousReg (Rule)

This rule inventories 4688 events and flags alerts for manually added registry keys. These are rare events and should be investigated when they appear.

Element properties:

Member Modules:

Source Code:

<Rule ID="SecurityMonitoringMP.ForwardedEvents.4688.SuspiciousReg" Enabled="true" Target="WindowsEventCollectorDiscovery!WindowsEventCollectorDiscovery.EventLogCollectorServer" ConfirmDelivery="true" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>Alert</Category>

  <DataSources>

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

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

      <LogName>ForwardedEvents</LogName>

      <AllowProxying>true</AllowProxying>

      <Expression>

        <And>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

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

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value Type="UnsignedInteger">4688</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery Type="String">Params/Param[6]</XPathQuery>

              </ValueExpression>

              <Operator>ContainsSubstring</Operator>

              <Pattern>reg.exe</Pattern>

            </RegExExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery Type="String">Params/Param[9]</XPathQuery>

              </ValueExpression>

              <Operator>ContainsSubstring</Operator>

              <Pattern>Add</Pattern>

            </RegExExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery Type="String">Params/Param[9]</XPathQuery>

              </ValueExpression>

              <Operator>ContainsSubstring</Operator>

              <Pattern>\Run /v</Pattern>

            </RegExExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery Type="String">Params/Param[9]</XPathQuery>

              </ValueExpression>

              <Operator>DoesNotContainSubstring</Operator>

              <Pattern>bginfo</Pattern>

            </RegExExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery Type="String">Params/Param[9]</XPathQuery>

              </ValueExpression>

              <Operator>DoesNotContainSubstring</Operator>

              <Pattern>HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v e2e /d c:\windows\System32\notepad.exe /f</Pattern>

            </RegExExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery Type="String">Params/Param[9]</XPathQuery>

              </ValueExpression>

              <Operator>DoesNotContainSubstring</Operator>

              <Pattern>\Prep\</Pattern>

            </RegExExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery Type="String">Params/Param[9]</XPathQuery>

              </ValueExpression>

              <Operator>DoesNotContainSubstring</Operator>

              <Pattern>C:\Program Files</Pattern>

            </RegExExpression>

          </Expression>

          <Expression>

            <RegExExpression>

              <ValueExpression>

                <XPathQuery Type="String">Params/Param[9]</XPathQuery>

              </ValueExpression>

              <Operator>DoesNotContainSubstring</Operator>

              <Pattern>Yahoo Messenger</Pattern>

            </RegExExpression>

          </Expression>

        </And>

      </Expression>

    </DataSource>

  </DataSources>

  <WriteActions>

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

      <Priority>1</Priority>

      <Severity>2</Severity>

      <AlertOwner/>

      <AlertMessageId>$MPElement[Name="SecurityMonitoringMP.ForwardedEvents.4688.SuspiciousReg.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>$Data/LoggingComputer$</AlertParameter1>

        <AlertParameter2>$Data/UserName$</AlertParameter2>

        <AlertParameter3>$Data/Params/Param[6]$</AlertParameter3>

        <AlertParameter4>$Data/Params/Param[9]$</AlertParameter4>

      </AlertParameters>

      <Suppression/>

      <Custom1/>

      <Custom2/>

      <Custom3/>

      <Custom4/>

      <Custom5/>

      <Custom6/>

      <Custom7/>

      <Custom8/>

      <Custom9/>

      <Custom10>Security Monitoring Forwarded Events</Custom10>

    </WriteAction>

  </WriteActions>

</Rule>