Backdoor Trojan Win32.Daodan has a Chinese author called Lovejintao.  It has RAT abilities meaning Remote Administration Tool.  This program is written in Visual C++ and is compressed with ASPack.  You can view numerous variants below.  You can become infected either via e-mail or through File and Print Sharing with a server application.

Recommended Action:
Remove at Once

AKA:
Backdoor.Daodan.123
Backdoor.Daodan.124
Backdoor.Delf.bi
BackDoor-ME
BackDoor-AIA
Bck/Daodan.123
Bck/Daodan.124
Trj/Lanbad.Cl
Trj/Lanbad.IP
Trj/Lanbad.Srv
Trj/Daodan
Backdoor/256000!Server
Backdoor/Daodan.123
Backdoor/Daodan_123!Dropper
Backdoor/Daodan.124
Backdoor/Rundll16
Win32/Daodan.A!Trojan

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Related Files:
[%WINDOWS%]\winrundll.exe
trojan.win32.daodan.exe