alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 2"; flow:to_server,established; pcre:"/^\d+?.\x00\x00\x00/"; byte_extract:4,-4,d_size,relative,little; byte_test:4,>,d_size,0,relative,little; content:"|78 9c|"; distance:4; within:2; reference:url,www.securelist.com/en/descriptions/10155706/Trojan-GameThief.Win32.Magania.eogz; reference:url,www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Backdoor%3AWin32%2FPcClient.ZR&ThreatID=-2147325231; classtype:command-and-control; sid:2016962; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_06_01, deployment Perimeter, malware_family Gh0st, malware_family PCRAT, performance_impact Significant, signature_severity Critical, tag PCRAT, tag Gh0st, tag RAT, updated_at 2019_07_26;)