alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User Agent (FTP)"; flow:to_server,established; http.user_agent; content:"Ftp"; nocase; depth:3; endswith; classtype:pup-activity; sid:2008735; rev:11; metadata:created_at 2010_07_30, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_19;)