alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MEOWBACKCONN CnC Checkin"; flow:established,to_server; flowbits:set,ET.MEOWBACKCONN; http.method; content:"POST"; http.user_agent; content:"go-http-client/"; nocase; http.request_body; content:"|22|IsAdmin|22 3a|"; pcre:"/^(?:true|false)/R"; content:"|22|Domain|22 3a 22|"; content:"|22|OSVersion|22 3a 22|Microsoft Windows|20 5b|Version|20|"; fast_pattern; content:"|22|PcName|22 3a 22|"; classtype:trojan-activity; sid:2065637; 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 2025_11_04, deployment Perimeter, malware_family MEOWBACKCONN, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_11_04, mitre_tactic_id TA0009, mitre_tactic_name Collection, mitre_technique_id T1005, mitre_technique_name Data_from_local_system; target:src_ip;)