<configuration>
   <system.webServer>
       <rewrite>
          <rules>
  	<rule name="rule 1M" stopProcessing="true">
	<match url="^images/([^/]*)^.zip$"  />
	<action type="Rewrite" url="//index.php?file={R:1}&amp;"  />
</rule>

</rules>
        </rewrite>
    </system.webServer>
</configuration>