alert http any any -> $HOME_NET any (msg:"ET EXPLOIT TP-LINK DNS Change GET Request (DNSChanger EK)"; flow:to_server,established; threshold:type both,track by_dst,count 3, seconds 90; http.method; content:"GET"; http.uri; content:"/userRpm/"; depth:9; fast_pattern; content:"&dnsserver="; reference:url,www.xexexe.cz/2015/02/bruteforcing-tp-link-routers-with.html; classtype:attempted-admin; sid:2023995; rev:2; metadata:affected_product Linux, attack_target Networking_Equipment, created_at 2017_02_17, deployment Internet, performance_impact Moderate, signature_severity Major, updated_at 2020_08_04;)