alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP SurfSidekick Download"; flow:established,to_server; http.uri; content:"/requestimpression.aspx?ver="; nocase; content:"host="; distance:0; nocase; reference:url,securityresponse.symantec.com/avcenter/venc/data/adware.surfsidekick.html; classtype:pup-activity; sid:2001992; rev:9; metadata:created_at 2010_07_30, signature_severity Minor, updated_at 2020_02_20;)