Malware-Control is a corporate command and control blacklist.
It is a professional product aimed at enterprise users.
The aim of C&C blacklists is to block the malware's point of connection, when it tries to push information out of the corporate network.
Blacklists are generally installed on proxy appliances in large corporate networks.
This approach considers that corporate networks are already infected by malware.
The benefit of this approach is to disable the malware's capacity to communicate with the C&C server.