title: File injected on into Joomla site
body: <p>we had Joomla 2.5.8.
  a virus file list.php was created in this path
  /public_html/modules/mod_jacontentslider/assets/css</p>
  
  <p>This file was sending spam emails non stop.</p>
  
  <p>we thought it was php hack and update to latest version of php and upgraded joomla 2.5.11 and we got hit again with the same issue.</p>
  
  <p>Any thoughts?</p>
  
  <h2>Update</h2>
  
  <p>I tried to download this infected file (list.php) to my windows 7 PC. The Microsoft security essentials software detected the virus and didn't allow me to download this file. </p>
  
  <p>So, is there some software on linux (CentOS 5.9) side that will scan the files periodically and automatically delete bad ones or notify us? We had clam installed which is of no use. It did not detect this virus file.</p>