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Date discovered:17/05/2010
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:36.864 Bytes
MD5 checksum:7b508569587800f36a602faf565a44e2
VDF version:

 General Method of propagation:
   • Mapped network drives

   •  Symantec: W32.SillyFDC
   •  Kaspersky: Worm.Win32.AutoRun.bhko
   •  TrendMicro: WORM_AUTORUN.MTZ
   •  F-Secure: Trojan.Generic.4126632
   •  Sophos: Mal/SillyFDC-F
   •  Panda: W32/Autorun.JXY
   •  VirusBuster: Worm.AutoRun.APJH
   •  Eset: Win32/AutoRun.VB.PA
   •  Bitdefender: Trojan.Generic.4126632

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

Side effects:
   • Downloads a malicious file
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %HOME%\%username%1\winlogon.exe

The following file is created:

– %HOME%\%username%1\VERSION.TXT This is a non malicious text file with the following content:
   • 190

It tries to download some files:

– The location is the following:
It is saved on the local hard drive under: %HOME%\%username%1\wlo.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Dropper.Gen

– The locations are the following:
It is saved on the local hard drive under: %HOME%\%username%1\winhelp32.exe Detected as: WORM/VBNA.B.370

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "NVIDIA Media Center Library"="%HOME%\%username%1\winlogon.exe"

– [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
   • "NVIDIA Media Center Library"="%HOME%\%username%1\winlogon.exe"

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

Description inserted by Alexandru Dinu on Friday, July 9, 2010
Description updated by Alexandru Dinu on Friday, July 9, 2010

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