alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Backdoor.Win32.Gh0st.QQ Checkin 2"; flow:to_server,established; content:"QQ|3a|"; depth:3; content:"|00 00|"; distance:11; within:2; content:"|00 00 78 9C|"; distance:2; within:4; byte_test:2,>,15,12,little; reference:md5,899feda736be77a39d05f0a5002048f0; classtype:trojan-activity; sid:2014110; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2012_01_10, deployment Perimeter, malware_family Gh0st, malware_family PCRAT, signature_severity Critical, tag PCRAT, tag Gh0st, tag RAT, updated_at 2019_07_26;)