alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Evil Redirector Leading to EK Apr 28 2016"; flow:established,from_server; file_data; content:"|3d 22 5c 78 32|"; content:"|3d 22 5c 78 36|"; content:"|3d 22 5c 78 37|"; fast_pattern; content:"</span>"; content:!"<span>"; distance:-500; within:500; pcre:"/^\s*?<script>\s*?(?:[A-Za-z][A-Za-z\d+]+\s*?\+?=\s*(?:[A-Za-z][A-Za-z\d]+|[\x22\x27]\\x[2-7][0-9a-fA-F](?:\\x[2-7][0-9a-fA-F]){0,4}[\x22\x27])\s*?\x3b){20}/Rs"; reference:url,researchcenter.paloaltonetworks.com/2016/03/unit42-campaign-evolution-darkleech-to-pseudo-darkleech-and-beyond/; classtype:exploit-kit; sid:2022772; rev:4; metadata:affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2016_04_28, deployment Perimeter, confidence High, signature_severity Major, tag Redirector, updated_at 2019_10_08;)