ET MALWARE Win32/Spyder CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Spyder CnC Checkin";
    flow:established,to_server;
    flowbits:set,ET.Spyder2023.1;
    flowbits:noalert;
    http.header_names;
    content:!"Connection|0d 0a|";
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.request_body;
    content:"data="; fast_pattern; startswith;
    base64_decode:offset 0,relative;
    base64_data;
    content:"|7b 22|hwid|22 3a 22|"; startswith;
    classtype:command-and-control;
    sid:2049698; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_12_15, deployment Perimeter, malware_family Spyder, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_13, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)