alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET WORM Win32.Socks.s HTTP Post Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; http.request_body; content:"proc=[System Process]|0a|"; depth:22; classtype:trojan-activity; sid:2008020; rev:6; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_18;)