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Are you using Ftp for transfering yours files into your server ,If yes then yours site may be infected with a piece of javascript code ,and all this happen when you dont upate your antivirus regularly and dont check yours system for malicious iframe codes and other viruses.
Infected Files – This virus attacks maily index.php, index.html, main.php, header.php, footer.php files on your server and you will find a hidden iframe virus at the end of these files .
All these happen when you leave yours Host password and username in your Ftp software , once the spayware became active on yours system then it will automaticaaly fetch all details from ftp and store maliculous code in your website.
To save your website from iframe code follow the below points suggested by Ricky .
- Keep your antivirus updated and regularly check your computer for malicious iframe codes and other viruses.
- Always download plugins and theme from the author’s website only or from the reliable source. Be careful while downloading from third party website. I see some bloggers downloading paid themes from rapidshare and other file hosting websites for free. My suggestion is to use legal theme as you won’t know the codes inside the theme
- Never upload anything to your FTP account at cybercafe or college PC. I usually blog from college PC, but I never upload anything to my FTP account from there. Once Techgenuine got infected with malicious iframe when I uploaded few plugins from college PC.
- Always use FTPS while uploading the plugin or theme.
- Scan all plugins or theme before uploading it to FTP to be on safer side.
- Make sure you have set the right permission for all your directories and especially .htaccess file. If your .htaccess file is writable then there is a very good chance that your website will get hacked sooner or later.
- Upgrade to latest version of wordpress as it covers many security patches.
- Always use strong password for your accounts and keep it changing frequently.
Its better to contact your hosting service , they will clear all virus file from your website if it is infected from iframe virus code.
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