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;
)