ET EXPLOIT_KIT Possible Malvertising EK Redirect to EK M2

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET EXPLOIT_KIT Possible Malvertising EK Redirect to EK M2";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".asp?id=";
    isdataat:!5,relative;
    http.accept_enc;
    content:"gzip, deflate"; depth:13; endswith;
    http.referer;
    content:".php?JBOSSESSION="; fast_pattern;
    classtype:exploit-kit;
    sid:2025913; rev:3;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2018_07_26, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16;
)