you are 3 versions of (old) joomla behind and lord knows what else.
for a start frontpage extensions installed are bad..
[ ] Ensure you have the
latest version of Joomla.
Delete all files in your Joomla installation. Replace the deleted files with fresh copies of a current full version of Joomla, and fresh copies of extensions and templates used.
Only by replacing all files in the installation (including extensions and templates) can you be sure to remove the backdoors inserted and hidden in files and directories
[ ] Review
Vulnerable Extensions List
[ ] Review and action
Security Checklist checklist 7 to make sure you've gone through all of the steps.
[ ] Change all passwords and if possible user names for the website host control panel and your Joomla site.
[ ] Use proper permissions on files and directories. They should
never be 777, but ideal is 644 and 755
[ ] For the
malicious code topic
[ ] If you are on godaddy - read this topic
http://forum.joomla.org/viewtopic.php?f=432&t=515398
If you feel none of the above applies to you read
these admin tips and the
what went wrong post