alert tcp-pkt $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Xenorat Default Handshake Inbound"; flow:established,to_client; dsize:117; content:"|71 00 00 00 00|"; startswith; reference:url,axmahr.github.io/posts/xenorat-detection/; classtype:trojan-activity; sid:2058419; 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 2024_12_19, deployment Perimeter, malware_family XenoRat, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_12_19, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1573, mitre_technique_name Encrypted_Channel; target:dest_ip;)