URGENT - PHP/MySQL Developer to fix Wordpress Site - Currently Down

Closed - This job posting has been filled and work has been completed.
Hourly Job
As Needed
Less than 1 week
Expert Level
I am willing to pay higher rates for the most experienced freelancers

Details

We have a wordpress blog that enables multiple users to register and post content. The site is currently bringing down the server, because a flood of malicious scripts are attempting to write to Mysql and the load is unsustainable. Need a developer to identify where the malicious scripts are connecting to mysql and install captcha's or some other method to prevent the flood of queries to mysql.