alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Java/QRat Checkin"; flow:established,to_server; content:"|73 72|"; depth:2; content:"|00 05|value"; distance:0; pcre:"/\x00\x05value$/"; classtype:command-and-control; sid:2021503; rev:1; metadata:created_at 2015_07_22, malware_family QRat, signature_severity Major, updated_at 2019_07_26;)