alert tls any any -> any any (msg:"ET DELETED Hash - Synology DDNS Beacon"; ja3_hash; content:"cab4a6a0c7ac91c2bd9e93cb0507ad4e"; reference:url,github.com/trisulnsm/trisul-scripts/blob/master/lua/frontend_scripts/reassembly/ja3/prints/ja3fingerprint.json; classtype:unknown; sid:2028474; rev:2; metadata:attack_target Client_Endpoint, created_at 2019_09_10, deployment Perimeter, signature_severity Major, tag c2, updated_at 2019_10_14, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)