alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win.Supper Tunnel C2 Magic Bytes Detected"; flow:established,to_server; dsize:300; content:"|69 11 55|"; offset:2; depth:8; fast_pattern; reference:url,c-b.io/2025-06-29+-+Supper+is+served; reference:url,malpedia.caad.fkie.fraunhofer.de/details/win.supper; classtype:trojan-activity; sid:2066435; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_12_22, deployment Perimeter, deployment SSLDecrypt, malware_family Supper, performance_impact Moderate, confidence Medium, signature_severity Major, tag Backdoor, updated_at 2025_12_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel; target:dest_ip;)