alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Kryptik Check-in"; flow:established,to_server; http.uri; content:".php?"; nocase; content:"&bot_id="; nocase; fast_pattern; pcre:"/\.php\?(q|name)=/i"; http.header_names; content:!"Referer|0d 0a|"; classtype:attempted-user; sid:2017741; rev:5; metadata:created_at 2013_11_22, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_22;)