alert tcp $HOME_NET any -> $EXTERNAL_NET 21 (msg:"ET FTP Outbound Java Downloading jar over FTP"; flow:to_server,established; flowbits:isset,ET.Java.FTP.Logon; content:".jar"; nocase; fast_pattern; content:"RETR "; pcre:"/^[^\r\n]+\.jar/Ri"; classtype:misc-activity; sid:2016688; rev:3; metadata:created_at 2013_03_29, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)