ET EXPLOIT_KIT Underminer EK Plugin Check

alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET EXPLOIT_KIT Underminer EK Plugin Check";
    flow:established,to_client;
    http.header;
    content:"Cache-Control|3a 20|private|3b 20|no-store|3b 20|no-cache|0d 0a|";
    content:"Content-Encoding|3a 20|gzip|0d 0a|";
    file.data;
    content:"name:location.hostname,init:function()"; nocase; within:300;
    content:"document.body.appendChild(UserData.userData)"; nocase; distance:0;
    content:"D27CDB6E-AE6D-11cf-96B8-444553540000"; nocase;
    content:".setAttribute(|22|type|22|,|22|application/x-shockwave-flash|22|)"; nocase; distance:0;
    content:".test(navigator.userAgent)?function"; nocase; distance:0;
    content:"map([|22|ShockwaveFlash.ShockwaveFlash|22|,|22|AcroPDF.PDF|22|,|22|PDF.PdfCtrl|22|,|22|QuickTime.QuickTime|22|,|22|RealPlayer|22|,|22|SWCtl.SWCtl|22|,|22|WMPlayer.OCX|22|,|22|AgControl.AgControl|22|,|22|Skype.Detection|22|]"; nocase; fast_pattern;
    classtype:exploit-kit;
    sid:2026424; rev:2;
    metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2018_09_28, deployment Perimeter, confidence High, signature_severity Major, tag Underminer_EK, updated_at 2020_08_25;
)