alert udp any 53 -> $HOME_NET any (msg:"ET EXPLOIT Possible 2015-7547 PoC Server Response"; flow:from_server; content:"|83 80 00 01 00 00 00 00 00 00|"; offset:2; depth:10; isdataat:2049; pcre:"/^(?:.[a-z0-9-]{2,}){2,}\x00\x00(?:\x01|\x1c)/Ri"; reference:cve,2015-7547; classtype:attempted-user; sid:2022542; rev:1; metadata:created_at 2016_02_18, cve CVE_2015_7547, confidence Medium, signature_severity Major, updated_at 2019_07_26;)