alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE XorBee RAT CNC Checkin M1"; flow:established,to_server; dsize:7; content:"|09 07 1b 52 52 55 68|"; fast_pattern; reference:url,rmceoin.github.io/malware-analysis/2026/04/13/xorbee-rat.html; classtype:trojan-activity; sid:2068716; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, tls_state plaintext, created_at 2026_04_13, deployment Perimeter, malware_family XorBee_RAT, performance_impact Low, confidence High, signature_severity Major, updated_at 2026_04_13, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel; target:src_ip;)