alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET EXPLOIT_KIT KaiXin Landing Page M2";
flow:from_server,established;
file_data;
content:"deconcept.SWFObjectUtil.getPlayerVersion"; fast_pattern;
content:"navigator.userAgent.toLowerCase()|3b|";
content:"if|28|document.cookie";
content:"var ";
pcre:"/^(?P<vname>[A-Za-z0-9]+)\s*?=\s*?navigator.userAgent.toLowerCase\x28\x29\x3b.+?if\(document.cookie[^\r\n]+\([^\r\n]+(?P=vname)[\x2e\x5b\x22\x27+\s]+i[\x22\x27+\s]*n[\x22\x27+\s]*d[\x22\x27+\s]*e[\x22\x27+\s]*x[\x22\x27+\s]*O[\x22\x27+\s]*f[\x22\x27+\s]*\x5d?\(\s*?[\x22\x27]b[\x22\x27+\s]*o[\x22\x27+\s]*t[\x22\x27+\s]*[\x22\x27][^\r\n]+(?P=vname)[\x2e\x5b\x22\x27+\s]+i[\x22\x27+\s]*n[\x22\x27+\s]*d[\x22\x27+\s]*e[\x22\x27+\s]*x[\x22\x27+\s]*O[\x22\x27+\s]*f[\x22\x27+\s]*\x5d?\(\s*?[\x22\x27]s[\x22\x27+\s]*p[\x22\x27+\s]*i[\x22\x27+\s]*d[\x22\x27+\s]*e[\x22\x27+\s]*r[\x22\x27+\s]*[\x22\x27]/Rs";
classtype:exploit-kit;
sid:2020407; rev:5;
metadata:created_at 2015_02_12, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)