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NanHaiShu is a remote access tool and JScript backdoor used by Leviathan. NanHaiShu has been used to target government and private-sector organizations that have relations to the South China Sea dispute. [1] [2]

ID: S0228
Platforms: Windows
Version: 1.0

Techniques Used

Domain ID Name Use
Enterprise T1089 Disabling Security Tools NanHaiShu can change Internet Explorer settings to reduce warnings about malware activity. [1]
Enterprise T1107 File Deletion NanHaiShu launches a script to delete their original decoy file to cover tracks. [2]
Enterprise T1170 Mshta NanHaiShu uses mshta.exe to load its program and files. [2]
Enterprise T1027 Obfuscated Files or Information NanHaiShu encodes files in Base64. [2]
Enterprise T1060 Registry Run Keys / Startup Folder NanHaiShu modifies the %regrun% Registry to point itself to an autostart mechanism. [2]
Enterprise T1105 Remote File Copy NanHaiShu can download additional files from URLs. [1]
Enterprise T1064 Scripting NanHaiShu executes additional Jscript and VBScript code on the victim's machine. [2]
Enterprise T1071 Standard Application Layer Protocol NanHaiShu uses DNS for the C2 communications. [2]
Enterprise T1082 System Information Discovery NanHaiShu can gather the victim computer name and serial number. [1]
Enterprise T1016 System Network Configuration Discovery NanHaiShu can gather information about the victim proxy server. [1]
Enterprise T1033 System Owner/User Discovery NanHaiShu collects the username from the victim. [2]

Groups That Use This Software

ID Name References
G0065 Leviathan [1]