alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED W32/Napolar Checkin"; flow:established,to_server; content:"POST"; http_method; nocase; content:"v="; depth:2; http_client_body; content:"&u="; distance:0; http_client_body; content:"&c="; distance:0; http_client_body; content:"&s={"; distance:0; http_client_body; content:"}&w="; fast_pattern; distance:0; http_client_body; content:"&b="; distance:0; http_client_body; pcre:"/&s=\{[A-Z0-9]{8}-([A-Z0-9]{4}-){3}[A-Z0-9]{12}\}&w=(\d{1,2}\.){2}\d{1,2}&b=(32|64)$/Pi"; reference:url,blog.avast.com/2013/09/25/win3264napolar-new-trojan-shines-on-the-cyber-crime-scene/; reference:url,www.welivesecurity.com/2013/09/25/win32napolar-a-new-bot-on-the-block/; reference:md5,2c344add2ee6201f4e2cdf604548408b; classtype:trojan-activity; sid:2017527; rev:3; metadata:created_at 2013_09_27, signature_severity Unknown, updated_at 2019_07_26;)