alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.Rovnix.I Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/ld.aspx?key="; startswith; http.header_names; to_lowercase; content:!"|0d 0a|accept|0d 0a|"; nocase; content:!"|0d 0a|referer|0d 0a|"; nocase; http.user_agent; content:"FWVersionTestAgent"; startswith; reference:md5,605daaa9662b82c0d5982ad3a742d2e7; classtype:command-and-control; sid:2017279; rev:6; metadata:created_at 2013_08_06, signature_severity Major, updated_at 2024_04_30;)