Might be time to close this thread.
The issue is not an SQL attack; NetSol has confirmed that it's their problem with their servers. WordPress is not the issue. | Small Business Conversations by Network Solutions. And WordPress confirms this: WordPress › Blog » Secure File Permissions Matter
If you keep getting hacked, work with NetSol to move you to a new server. If you don't want to work with NetSol anymore, change hosts.
If you don't do anything or NetSol does nothing for you, chances are very good you will continue to be hacked because of NetSol's problems.