Virus:TR/NSAnti.B.7
Date discovered:29/07/2006
Type:Trojan
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:42.102 Bytes
MD5 checksum:caf96db786db731ed89d4ec7a7596ea5
VDF version:6.35.01.20
IVDF version:6.35.01.20

 General    •  Symantec: Trojan.PWS.QQPass
   •  TrendMicro: TSPY_QQPASS.QM
   •  Bitdefender: Trojan.NSAnti.B


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows ME


Side effects:
   • Drops a file
   • Drops a malicious file
   • Records keystrokes
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • %PROGRAM FILES%\Internet Explorer\PLUGINS\system.jmp



It deletes the following files:
   • %WINDIR%\DESKTOP\WODEXIAOSHIHOUCHAONAORENXINGDESHIHOU
   • %WINDIR%\DESKTOP\WAIOZONGSHICHANGGEHONGWONAHSOUGEHAOXIANGZHEYANGCHANGDEWODEGUXIANGZAIYUANFANG
   • %WINDIR%\DESKTOP\TIANHEIHEITIOOTIANTIANDOUYAONIAIWODEXINSIYOUNICAIBUYAOWENWOCONGNALILAI
   • %WINDIR%\DESKTOP\NPKCRYPT.SYS



The following file is created:

– %PROGRAM FILES%\Internet Explorer\PLUGINS\system.sys Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.QQRob.GD

 Registry – HKLM\Software\Microsoft\Windows\CurrentVersion\explorer\
   ShellExecuteHooks
   • "{C9953583-932E-4EA1-A04B-4523AAB72C30}"=""



The following registry key is added:

– HKCR\CLSID\{C9953583-932E-4EA1-A04B-4523AAB72C30}\InProcServer32
   • "Default"="%PROGRAM FILES%\Internet Explorer\PLUGINS\system.sys"
   • "ThreadingModel"="Apartment"

 Backdoor Sends information about:
    • Cached passwords

 Injection –  It injects the following file into a process: %PROGRAM FILES%\Internet Explorer\PLUGINS\system.sys


– It injects itself as a thread into a process.

    Process name:
   • %all running processes%


 File details Programming language:
 The malware program was written in Delphi.

Description inserted by Bogdan Iliuta on Wednesday, August 9, 2006
Description updated by Andrei Ivanes on Monday, August 14, 2006

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