alert tcp $EXTERNAL_NET 1024: -> $HOME_NET any (msg:"ET DELETED Delf CnC Channel Packet 1 reply"; flowbits:isset,ET.unk.1; flow:established,from_server; dsize:<15; content:"|05 00 00 00|"; depth:4; flowbits:set,ET.unk.2; classtype:command-and-control; sid:2008007; rev:6; metadata:created_at 2010_07_30, signature_severity Unknown, updated_at 2019_07_26;)