alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Jadtree Downloader rar"; flow:established,to_server; http.uri; content:".rar"; nocase; endswith; http.user_agent; bsize:4; pcre:"/^\d{4}$/"; reference:md5,13cbc8d458c6dd30e94f46b00f8bda00; classtype:trojan-activity; sid:2018046; rev:5; metadata:created_at 2014_01_30, signature_severity Major, updated_at 2020_09_15;)