ET MALWARE Observed Certificate Containing Double Base64 Encoded Executable Inbound

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Observed Certificate Containing Double Base64 Encoded Executable Inbound";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"-----BEGIN CERTIFICATE-----|0d 0a|"; depth:100;
    content:"GVYTjBaVzB"; distance:0; fast_pattern;
    isdataat:1000,relative;
    classtype:trojan-activity;
    sid:2029277; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_14, deployment Perimeter, confidence High, signature_severity Major, updated_at 2020_01_14, reviewed_at 2024_04_30;
)