Virus:TR/Dldr.Java.A
Date discovered:10/08/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:678.912 Bytes
MD5 checksum:71e8eb92e2a49333827cac2290352843
IVDF version:7.10.10.146 - Wednesday, August 11, 2010

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Trojan-Downloader.Win32.Delf.aded
   •  Eset: Win32/TrojanDownloader.Banload.PFD
   •  AhnLab: Downloader/Win32.Delf


Platforms / OS:
   • Windows 98
   • Windows 98 SE
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows Server 2008
   • Windows 7


Side effects:
   • Downloads malicious files

 Files It tries to download some files:

– The location is the following:
   • http://www.f**********g
It is saved on the local hard drive under: %WINDIR%\Java__Updat2.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too.

– The location is the following:
   • http://d**********g
It is saved on the local hard drive under: %WINDIR%\Java__Updat3.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too.

– The location is the following:
   • http://dl**********g
It is saved on the local hard drive under: %WINDIR%\Java__Updat4.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR.Agent.17591909


– The location is the following:
   • http://p**********5.jpg
It is saved on the local hard drive under: %WINDIR%\Java__Updat5.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too.

– The location is the following:
   • http://p**********pg
It is saved on the local hard drive under: %WINDIR%\Java_Update.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too.

– The location is the following:
   • http://www.fi**********1.jpg
It is saved on the local hard drive under: %WINDIR%\W11.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too.

– The location is the following:
   • http://www.fi**********2.jpg
It is saved on the local hard drive under: %WINDIR%\W22.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too.

– The location is the following:
   • http://www.f**********3.jpg
It is saved on the local hard drive under: %WINDIR%\W33.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too.

– The location is the following:
   • http://www.fi**********4.jpg
It is saved on the local hard drive under: %WINDIR%\W44.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. Detected as: TR/Dldr.Delf.AC

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


Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Carlos Valero Llabata on Wednesday, August 11, 2010
Description updated by Andrei Ivanes on Thursday, August 12, 2010

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