alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Danabot Key Exchange Request"; flow:established,to_server; dsize:28; stream_size:client,=,29; content:"|24 01 00 00 00 00 00 00 00 00 00 00|"; startswith; classtype:command-and-control; sid:2034465; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_01_14, deployment Perimeter, malware_family Danabot, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_01_14;)