alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET ADWARE_PUP OfferOptimizer.com Spyware"; flow:to_server,established; content:"/ctx/keyword_context.php?"; nocase; http_uri; content:"urlContext=http"; nocase; http_uri; reference:url,www.offeroptimizer.com; classtype:pup-activity; sid:2001341; rev:12; metadata:created_at 2010_07_30, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_08_14;)