alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Vawtrak/NeverQuest Checkin"; flow:to_server,established; http.method; content:"POST"; nocase; http.header_names; content:!"Referer|0d 0a|"; http.request_body; content:"id="; startswith; content:"&info="; distance:0; pcre:"/^id=[A-Z0-9]+?&info=[A-Z0-9]+?$/"; classtype:command-and-control; sid:2017839; rev:3; metadata:created_at 2013_12_12, signature_severity Major, updated_at 2020_04_27;)