alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Rovnix Activity"; flow:established,to_server; http.uri; content:".php?version="; fast_pattern; content:"&user="; content:"&server="; content:"&crc="; pcre:"/user=[a-f0-9]{31,32}&/i"; http.header_names; content:!"Referer|0d 0a|"; reference:url,blog.eset.com/2012/02/22/rovnix-reloaded-new-step-of-evolution; classtype:trojan-activity; sid:2014275; rev:6; metadata:created_at 2012_02_24, signature_severity Major, updated_at 2020_09_18;)