ET MALWARE QRat.Java.RAT Checkin Response

alert tcp $EXTERNAL_NET !$HTTP_PORTS -> $HOME_NET any (
    msg:"ET MALWARE QRat.Java.RAT Checkin Response";
    flow:established,to_client;
    content:"|7b 22 6d 61 73 6d 61 67 22 3a 22|"; within:48; fast_pattern;
    content:"|22 2c 22 6d 61 73 76 65 72 22 3a|"; distance:0;
    content:"|2c 22 6d 61 73 69 64 22 3a 22|"; distance:0;
    content:"|22 2c 22 6e 65 65 64 2d 6d 6f 72 65 22 3a|"; distance:0;
    content:"|7b 22 6d 61 67 69 63 22 3a 22|"; distance:0;
    content:"|22 2c 22 69 6e 64 65 78 22 3a 22|"; distance:0;
    content:"|22 68 61 73 2d 72 65 71 75 65 73 74 65 72 22 3a|"; distance:0;
    content:"|22 68 61 73 2d 61 63 63 65 70 74 65 72 22 3a|"; distance:0;
    reference:md5,3ffbde179d54377d55fcac76ebf314cb;
    reference:url,labsblog.f-secure.com/2016/06/07/qarallax-rat-spying-on-us-visa-applicants/;
    reference:url,www.trustwave.com/Resources/SpiderLabs-Blog/Quaverse-RAT--Remote-Access-as-a-Service/;
    classtype:command-and-control;
    sid:2025392; rev:3;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_02_26, deployment Perimeter, malware_family QRat, confidence High, signature_severity Major, updated_at 2019_07_26;
)