alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Connectivity Check of Unknown Origin 1"; flow:established,to_server; urilen:1; http.method; content:"GET"; nocase; http.uri; content:"/"; http.user_agent; bsize:24; content:"Mozilla/4.0 (compatible)"; http.host; bsize:14; content:"www.google.com"; fast_pattern; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a|"; startswith; http.cookie; content:"PREF=ID="; startswith; classtype:trojan-activity; sid:2013349; rev:6; metadata:created_at 2011_08_04, confidence Medium, signature_severity Major, updated_at 2024_03_04;)