alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Upatre Binary Download Jan 02 2014"; flow:established,from_server; http.content_type; content:"text/plain"; bsize:10; file.data; content:"ZZP|00|"; within:4; classtype:trojan-activity; sid:2018055; rev:5; metadata:created_at 2014_02_03, signature_severity Major, updated_at 2020_05_21;)