alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Downloader.Win32.Geral Checkin"; http.uri; content:".asp?MAC="; nocase; fast_pattern; content:"&ver="; nocase; pcre:"/\.asp\?MAC=[A-F0-9]{2}-[A-F0-9]{2}-[A-F0-9]{2}-[A-F0-9]{2}-[A-F0-9]{2}-[A-F0-9]{2}&VER=[^&]+$/i"; http.header_names; content:!"Referer|0d 0a|"; reference:md5,f01260fff3d6fb705fc8afaa3ea54564; classtype:command-and-control; sid:2018201; rev:4; metadata:created_at 2014_03_04, signature_severity Major, updated_at 2020_09_22;)