WSA appliances support Anti Malware (Webroot), Anti Virus (Sophos/McAfee), Advanced Malware Protection (File Analysis and Reputation) and Web Reputation and Web Categorisation.
Please see below for the appliance data sheet that will give you more information in details:
http://www.cisco.com/c/en/us/products/collateral/security/content-security-management-appliance/data_sheet_c78-729630.html?cachemode=refresh
