alert ftp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET FTP Outbound Java Anonymous FTP Login"; flow:to_server,established; content:"USER anonymous|0d 0a|PASS Java1."; fast_pattern; pcre:"/^\d\.\d(_\d+)?\@\r\n/R"; flowbits:set,ET.Java.FTP.Logon; classtype:misc-activity; sid:2016687; rev:4; metadata:created_at 2013_03_29, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_17, reviewed_at 2024_01_25;)