alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE FrigidBackdoor Request ZIP"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:16; content:"/trovo/index.php"; fast_pattern; http.user_agent; content:"curl/"; startswith; reference:url,moonlock.com/macc-stealer-macsync-backdoor; classtype:trojan-activity; sid:2064778; rev:1; metadata:affected_product Mac_OSX, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_09_18, deployment Perimeter, confidence High, signature_severity Major, tag Backdoor, tag c2, tag FrigidBackdoor, updated_at 2025_09_18, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)