alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Havex Rat Check-in URI Struct"; flow:established,to_server; content:"POST"; http_method; content:!"Referer|3a 20|"; content:".php?id"; http_uri; content:"&v1="; http_uri; content:"&v2="; http_uri; content:"&q="; http_uri; pcre:"/\.php\?id=[A-F0-9]+\-[A-F0-9]+&v1=[A-F0-9]+&v2=[A-F0-9]+&q=[A-F0-9]+$/U"; reference:md5,6557d6518c3f6bcb8b1b2de77165c962; classtype:trojan-activity; sid:2018251; rev:2; metadata:created_at 2014_03_11, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)