alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Backdoor.Win32.Gh0st Checkin (5-12 Byte keyword)"; flow:to_server,established; dsize:<900; content:"|00 00|"; offset:7; depth:9; content:"|00 00 78 9C|"; distance:2; within:4; pcre:"/^[a-z0-9\x40\x2d\x5f]{5,12}..\x00\x00..\x00\x00\x78\x9c/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/; reference:url,www.norman.com/about_norman/press_center/news_archive/2012/the_many_faces_of_gh0st_rat/en; classtype:trojan-activity; sid:2015624; rev:11; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2011_09_23, deployment Perimeter, malware_family Gh0st, malware_family PCRAT, signature_severity Critical, tag PCRAT, tag Gh0st, tag RAT, updated_at 2019_08_22;)