alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP MySideSearch Browser Optimizer"; flow:established,to_server; http.method; content:"GET"; nocase; http.uri; content:".php?aff="; nocase; content:"&act="; nocase; http.user_agent; content:"NSISDL/1.2 (Mozilla)"; nocase; depth:20; reference:url,www.spywareremove.com/removeMySideSearch.html; reference:url,www.threatexpert.com/threats/adware-win32-mysidesearch.html; reference:url,www.pctools.com/mrc/infections/id/Adware.MySideSearch/; classtype:pup-activity; sid:2009524; rev:10; metadata:created_at 2010_07_30, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_19;)