Sucuri malware scanner within iControlWP is a 3rd party tool that scans your site and check for your site on blacklists. 

This tool is accessible from the "Security" tab for the site you're managing:

See here scan results for a good site....

....and here are the results for a bad site:

Please note: This is not a full-blown Sucuri Malware Scan – for this you will need to contact Sucuri and obtain a full license for their complete scanning product.

For more information on Sucuri malware scanner within iControlWP, read the 2nd part of the blog article here.