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The Internet threat alert status is currently normal. At present, no major epidemics or other serious incidents have been recorded by Kaspersky Lab’s monitoring service. Internet threat level: 1

Trojan-Downloader.Win32.Agent.fqbf

Detected Jan 12 2011 03:18 GMT
Released Jan 12 2011 11:26 GMT
Published Apr 22 2011 10:47 GMT

Manual description Auto description
This description was created by experts at Kaspersky Lab. It contains the most accurate information available about this program.

Technical Details
Payload
Removal instructions

Technical Details

This Trojan downloads other malware via the Internet and launches it for execution without the user's knowledge or consent. It is a Windows application (PE EXE file). It is 20 480 bytes in size. It is written in Visual Basic.


Payload

Once launched, the Trojan downloads files from the following URL addresses:

http://www.depa***entocoliseu.com/loja/crediario/acordo/1.jpg
http://www.depa***entocoliseu.com/loja/crediario/acordo/2.jpg
http://www.depa***entocoliseu.com/loja/crediario/acordo/3.jpg

At the time of writing, these links were inactive.

The Trojan saves the downloaded files under the following names:

%UserProfile%\Flex01.exe
%UserProfile%\Flex02.exe
%UserProfile%\Flex03.exe

The Trojan then launches the downloaded files for execution and ceases running.


Removal instructions

If your computer does not have antivirus protection and has been infected by this malicious program, follow the instructions below to delete it:

  1. Delete the original Trojan file (its location will depend on how the program originally penetrated the infected computer).
  2. Delete the following files:
    %UserProfile%\Flex01.exe
    %UserProfile%\Flex02.exe
    %UserProfile%\Flex03.exe
    
  3. Perform a full scan of the computer using Kaspersky Anti-Virus with up-to-date antivirus databases (download a trial version).

MD5: 36B9BDC16261BC237E318135CAF13E90

SHA1: 8018677DF0D8BBDF5C4B28761107CD5AC50DC67F


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Trojan-Downloader

Programs classified as Trojan-Downloader download and install new versions of malicious programs, including Trojans and AdWare, on victim computers. Once downloaded from the Internet, the programs are launched or included on a list of programs which will run automatically when the operating system boots up.

Information about the names and locations of the programs which are downloaded are in the Trojan code, or are downloaded by the Trojan from an Internet resource (usually a web page).

This type of malicious program is frequently used in the initial infection of visitors to websites which contain exploits.


Other versions

Aliases

Trojan-Downloader.Win32.Agent.fqbf (Kaspersky Lab) is also known as:

  • Trojan: Generic Downloader.x!ehu (McAfee)
  • Mal/Generic-L (Sophos)
  • Generic Trojan (Panda)
  • W32/VBTrojan.17D1!Maximus (FPROT)
  • TrojanDownloader:Win32/Banload.TX (MS(OneCare))
  • Trojan.DownLoader1.53413 (DrWeb)
  • Win32/TrojanDownloader.Banload.NPJ trojan (Nod32)
  • Trojan.Generic.KDV.113421 (BitDef7)
  • Win32:VB-RBT [Trj] (AVAST)
  • Trojan.VB (Ikarus)
  • Downloader.Banload.BEHP (AVG)
  • Downloader (NAV)
  • NseCheckFile2() returned 0x00010018 (Norman)