alert http $HOME_NET any -> $EXTERNAL_NET any (
msg:"ET MALWARE Backdoor.Win32/Likseput.A Checkin Windows Vista/7/8";
flow:to_server,established;
http.header;
content:"|5c|"; within:64;
content:"Host|3a 20|"; distance:0;
content:!"|0d 0a|"; distance:-6; within:2;
http.user_agent;
content:"6."; depth:2;
pcre:"/^6\.[0-2]\x20\d\d\x3a\d\d\x20/i";
reference:md5,b5e9ce72771217680efaeecfafe3da3f;
reference:md5,4b6f5e62d7913fc1ab6c71b5b909ecbf;
classtype:command-and-control;
sid:2016433; rev:5;
metadata:created_at 2013_02_20, signature_severity Major, updated_at 2020_10_14;
)