alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET CHAT Gadu-Gadu Chat Client Checkin via HTTP"; flow:established,to_server; http.uri; content:"/appsvc/appmsg"; nocase; content:"fmnumber="; nocase; content:"&version="; nocase; content:"&fmt="; nocase; content:"&lastmsg="; nocase; classtype:trojan-activity; sid:2007866; rev:10; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2020_08_20;)