ET MALWARE FrigidBackdoor Exfil Zip

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE FrigidBackdoor Exfil Zip";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:17;
    content:"/api/data/receive";
    http.user_agent;
    content:"curl/"; startswith;
    http.header;
    content:"X-Bid: f48fbe39836779cadbf148b5952919fd"; fast_pattern;
    http.request_body;
    content:".zip";
    reference:url,moonlock.com/macc-stealer-macsync-backdoor;
    classtype:trojan-activity;
    sid:2064777; 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 Description_Generated_By_Proofpoint_Nexus, 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;
)