alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"ET MALWARE ZeuS Clickfraud List Delivered To Client"; flow:established,from_server; content:"|0d 0a 0d 0a|<xml>"; content:"<time>"; distance:0; content:"<doc>"; distance:0; content:"<url>http|3a|//"; distance:0; content:"<ref>"; distance:0; content:"<n>"; distance:0; classtype:trojan-activity; sid:2014317; rev:2; metadata:created_at 2012_03_06, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)