alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE MEOWBACKCONN CnC Checkin - Server Response"; flow:established,to_client; flowbits:isset,ET.MEOWBACKCONN; http.stat_code; content:"200"; http.response_body; content:"|22|WorkingPort|22 3a 22|"; fast_pattern; content:"|22|Login|22 3a 22|"; content:"|22|Password|22 3a 22|"; classtype:trojan-activity; sid:2065638; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_11_04, deployment Perimeter, malware_family MEOWBACKCONN, performance_impact Low, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_04; target:dest_ip;)