ET MALWARE RAZR Ransomware CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE RAZR Ransomware CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri; bsize:12;
    content:"/c2/receiver";
    http.user_agent; bsize:17;
    content:"TLD13Browser/12.0"; fast_pattern;
    http.content_type; bsize:16;
    content:"application/json";
    http.request_body;
    content:"|7b 22|id|22 3a 20 22|"; startswith;
    pcre:"/^(?:[A-Z0-9]{4}-){7}[A-Z0-9]{3}/R";
    content:"|22 2c 20 22|iv|22 3a 20 22|"; within:10;
    pcre:"/^[a-f0-9]{32}/R";
    content:"|22 2c 20 22|key|22 3a 20 22|"; within:11;
    pcre:"/^[a-f0-9]{64}/R";
    content:"|22 7d|"; endswith;
    reference:md5,a1160fa83f4b7247a10c6476449a2719;
    classtype:trojan-activity;
    sid:2055401; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_08_22, deployment Perimeter, malware_family RAZR_Ransomware, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_08_22;
    target:src_ip;
)