alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Backdoor family PCRat/Gh0st CnC traffic (OUTBOUND) 14"; flow:established,to_server; stream_size:server,<,5; dsize:>11; byte_extract:4,0,c_size,little; byte_test:4,>,c_size,4,little; content:"|08 01|"; offset:2; depth:2; content:"|79 94|"; offset:13; depth:2; pcre:"/^.{8}[\x20-\x7e]+?\x79\x94/s"; 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; reference:md5,9fae15fa8ab6bb8d78d609bdceafe28e; classtype:command-and-control; sid:2017944; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2014_01_08, deployment Perimeter, malware_family Gh0st, malware_family PCRAT, performance_impact Significant, confidence Medium, signature_severity Critical, tag PCRAT, tag Gh0st, tag RAT, updated_at 2021_09_09;)