Malware
NanHaiShu
NanHaiShu is a remote access tool and JScript backdoor used by Leviathan.
NanHaiShu is a JavaScript malware family operated by Leviathan.
Background
NanHaiShu is a JScript backdoor and remote access tool employed by Leviathan. It has been directed at government bodies and private-sector firms connected to the South China Sea dispute.
Source: Malpedia (Fraunhofer FKIE).