alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Backdoor.Win32.Gh0st Checkin (7 Byte keyword)"; flow:to_server,established; content:"|00 00|"; offset:9; depth:2; content:"|00 00 78 9C|"; distance:2; within:4; byte_test:2,>,15,7,little; pcre:"/^[a-z0-9]{7}..\x00\x00/i"; 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:url,labs.alienvault.com/labs/index.php/2012/new-macontrol-variant-targeting-uyghur-users-the-windows-version-using-gh0st-rat/; reference:url,www.infowar-monitor.net/2009/09/tracking-ghostnet-investigating-a-cyber-espionage-network/; reference:url,blogs.rsa.com/will-gragido/lions-at-the-watering-hole-the-voho-affair/; classtype:trojan-activity; sid:2015628; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2012_08_15, deployment Perimeter, malware_family Gh0st, malware_family PCRAT, signature_severity Critical, tag PCRAT, tag Gh0st, tag RAT, updated_at 2019_07_26;)