alert tcp $HOME_NET any -> $EXTERNAL_NET 5554 (msg:"ET DELETED Sasser FTP exploit attempt"; flow:to_server,established; dsize:>150; content:"PORT "; depth:5; reference:url,www.lurhq.com/dabber.html; classtype:attempted-admin; sid:2001548; rev:7; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)