Virus:TR/Dldr.VB.aet
Date discovered:06/07/2006
Type:Trojan
Subtype:downloader
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:26.624 Bytes
MD5 checksum:eecbe21f23fe081b7f776682866f28a8
VDF version:6.35.00.126
IVDF version:6.35.00.154 - Wednesday, July 12, 2006

 General Aliases:
   •  Kaspersky: Trojan-Downloader.Win32.VB.aet
   •  VirusBuster: trojan Trojan.DL.VB.WON
   •  Bitdefender: Trojan.Downloader.VB.QU


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP


Side effects:
   • Downloads a malicious file
   • Drops a file

 Files The following file is created:

– %current directory%\%executed file%.bat This batch file is used to delete a file.

– The location is the following:
   • http://sdoxnisuka.info/bin/**********
It is saved on the local hard drive under: %SYSDIR%\ieschedule.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Spy.Sters.V.10

 Registry The following registry key is added:

– HKLM\SYSTEM\CurrentControlSet\Control\InitRegKey\mod
   • "jpeg"="1"
   • "fake"="1"
   • "inject"="1"

 Miscellaneous  Checks for an internet connection by contacting the following web site:
   • www.microsoft.com

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


Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
   • UPX

Description inserted by Bogdan Iliuta on Thursday, August 31, 2006
Description updated by Bogdan Iliuta on Friday, November 24, 2006

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