alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE TrustConnect RAT CnC Activity (Files Browse)"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:68; content:"|2f|api|2f|files|2f|browse|2f|pull|3f|deviceId|3d|"; startswith; fast_pattern; pcre:"/^(?:[a-z0-9]{8})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{4})\x2d(?:[a-z0-9]{12})$/R"; http.header_names; content:!"|0d 0a|referer|0d 0a|"; nocase; content:!"|0d 0a|referer|0d 0a|"; nocase; content:!"|0d 0a|x-"; nocase; threshold:type limit,count 1,seconds 300,track by_src; reference:md5,128e8469959cdb0a8e7e29eb84af0e79; classtype:command-and-control; sid:2067682; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2026_02_06, deployment Perimeter, deployment SSLDecrypt, malware_family TrustConnect, confidence High, signature_severity Critical, updated_at 2026_02_16, former_sid 2865954, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)