alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.Kazy Checkin"; flow:established,to_server; urilen:65; http.uri; content:"AAA=="; endswith; fast_pattern; pcre:"/\/[\x2f\x2bA-Za-z0-9]{59}AAA==$/"; http.host; content:!"mvds1.org"; classtype:command-and-control; sid:2018401; rev:5; metadata:created_at 2014_04_18, signature_severity Major, updated_at 2020_10_09;)