alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED GhostNet Trojan Reporting"; flow:established,to_server; content:"/microsoft/v2/update/upgrade.aspx?hostname="; http_uri; content:"&ostype="; http_uri; content:"&macaddr="; http_uri; content:"&ipaddr="; http_uri; content:"&owner="; http_uri; threshold:type limit, track by_src, count 1, seconds 300; reference:url,www.scribd.com/doc/13731776/Tracking-GhostNet-Investigating-a-Cyber-Espionage-Network; classtype:trojan-activity; sid:2009202; rev:9; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2021_06_23;)