alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Adaptix C2 X-Beacon-Id HTTP Header Observed"; flow:established,to_server; http.header_names; content:"|0d 0a|X-Beacon-Id|0d 0a|"; fast_pattern; reference:url,github.com/Adaptix-Framework/AdaptixC2/blob/a7401fa3fdbc7ae6b632c40570292f844e40ff40/Extenders/listener_beacon_http/config.json; classtype:trojan-activity; sid:2063045; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Mac_OSX, affected_product Linux, affected_product Windows_11, attack_target Client_and_Server, tls_state TLSDecrypt, created_at 2025_06_18, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Adaptix, updated_at 2025_06_18, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel; target:src_ip;)