alert tcp $HOME_NET any -> $EXTERNAL_NET 1024: (msg:"ET MALWARE RevProxy ClientHello"; flow:established,to_server; dsize:13; content:"|04 00 00 01 05 00 00 00 00 07 00 01 00|"; reference:md5,7bf026c71d4ca6cdc7b6e543f9a5bb64; classtype:trojan-activity; sid:2014348; rev:2; metadata:created_at 2012_03_09, confidence High, signature_severity Major, updated_at 2019_07_26;)