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Virus:Worm/VBNA.iby
Date discovered:26/09/2009
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:No
File size:45.056 Bytes
IVDF version:7.01.06.41 - Saturday, September 26, 2009

 General Method of propagation:
    Autorun feature


Aliases:
   •  Mcafee: W32/VBNA.worm
   •  Sophos: W32/Autorun-ARS
   •  Panda: W32/Vobfus.gen.worm
   •  Eset: Win32/AutoRun.VB.GE
   •  Bitdefender: Trojan.VB.Chinky.U


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops malicious files
   • Lowers security settings
   • Registry modification
   • Third party control

 Files It copies itself to the following locations:
   • %HOME%\riuom.exe
   • %drive%\riuom.exe
   • %drive%\riuom.scr



The following files are created:

%drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

%drive%\Documents.lnk This is a non malicious text file with the following content:
   • %code that runs malware%

%drive%\Music.lnk This is a non malicious text file with the following content:
   • %code that runs malware%

%drive%\New Folder.lnk This is a non malicious text file with the following content:
   • %code that runs malware%

%drive%\Pictures.lnk This is a non malicious text file with the following content:
   • %code that runs malware%

%drive%\Video.lnk This is a non malicious text file with the following content:
   • %code that runs malware%

%drive%\Passwords.lnk This is a non malicious text file with the following content:
   • %code that runs malware%

 Registry One of the following values is added in order to run the process after reboot:

  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "riuom"="C:\Documents and Settings\Administrator\riuom.exe"



The following registry key is changed:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "ShowSuperHidden"=dword:0x00000000

 Backdoor Contact server:
The following:
   • ns4.th**********.net:8000


 Injection  It injects a process watching routine into a process.

    Process name:
   • %all running processes%


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

Description inserted by Petre Galan on Tuesday, February 16, 2010
Description updated by Petre Galan on Wednesday, February 17, 2010

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