ET EXPLOIT_KIT Capesand EK Landing

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT_KIT Capesand EK Landing";
    flow:established,to_client;
    file_data;
    content:"NzgzNDI"; fast_pattern;
    content:"NzgzNDI"; distance:0;
    content:"NzgzNDI"; distance:0;
    content:"=|22|,|20 0a 22|"; distance:0;
    content:"=|22|,|20 0a 22|"; distance:0;
    content:"=|22|,|20 0a 22|"; distance:0;
    content:"=|22|,|20 0a 22|"; distance:0;
    pcre:"/^[a-zA-Z0-9]{4}NzgzNDI[a-zA-Z0-9]{8}=\x22/R";
    reference:url,blog.trendmicro.com/trendlabs-security-intelligence/new-exploit-kit-capesand-reuses-old-and-new-public-exploits-and-tools-blockchain-ruse/;
    classtype:exploit-kit;
    sid:2028937; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_05, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_11_05;
)