11Feb/101
Hackers at work
Please note hackers are going around to deface web sites mostly in Asia region. Their web site it called Indonesia Defacer.
Remember to backup your web site and database. Make sure update all your web application to latest version to prevent SQL Injection and Cross Site Scripting (XSS) attack.
If you need to report this to authority, try report to MYCERT for Malaysia.
The hacker mainly hack those PHP based web application with MySQL backend.