alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE VKeylogger CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:26; pcre:"/^\x2f[A-Za-z0-9]{16}/"; content:"/gate.php"; fast_pattern; endswith; http.header_names; content:"|0d 0a|Connection|0d 0a|Content-Length|0d 0a|Host|0d 0a 0d 0a|"; http.request_body; bsize:50<>200; reference:md5,5787ea8e8245606f5058f20179a82683; reference:url,infosec.exchange/@james_inthe_box/114467642193592872; classtype:trojan-activity; sid:2062154; 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_05_07, deployment Perimeter, malware_family VKeylogger, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2025_05_07, mitre_tactic_id TA0037, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel; target:src_ip;)