alert tcp-pkt $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/Unknown RAT CnC Server Acknowledgement"; flow:established,to_client; dsize:9; content:"|09 00 00 00 01 00 00 00 15|"; fast_pattern; reference:md5,324877533d7f0c4014e0f046d0c28d39; reference:md5,dd43c6237024d7867e5e441871c64402; classtype:trojan-activity; sid:2049151; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_and_Server, created_at 2023_11_10, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_11_10; target:dest_ip;)