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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.VBS.Agent.aby

Detected Feb 16 2011 15:48 GMT
Released Feb 16 2011 21:40 GMT
Published Apr 20 2011 09:22 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 malicious programs from the Internet and launches them for execution without the user's knowledge. It is a Visual Basic script. It is 3564 bytes in size.


Payload

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

http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1001.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1002.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1003.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1004.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1005.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1006.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1007.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1008.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1009.gif
http://adminlz***600.org/img/T1gANoXmXwXXcGRBI1_1010.gif
At the time of writing, these links were inactive. It saves downloaded files under the following names, respectively:
c:\windows\Resources\1001.exe
c:\windows\Resources\1002.exe
c:\windows\Resources\1003.exe
c:\windows\Resources\1004.exe
c:\windows\Resources\1005.exe
c:\windows\Resources\1006.exe
c:\windows\Resources\1007.exe
c:\windows\Resources\1008.exe
c:\windows\Resources\1009.exe
c:\windows\Resources\1010.exe
The Trojan then launched downloaded files for execution and in a hidden mode launches Internet Explorer where it opens the following link:
http://adminlz***600.org/img/gg.htm?vbs31


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:
    c:\windows\Resources\1001.exe
    c:\windows\Resources\1002.exe
    c:\windows\Resources\1003.exe
    c:\windows\Resources\1004.exe
    c:\windows\Resources\1005.exe
    c:\windows\Resources\1006.exe
    c:\windows\Resources\1007.exe
    c:\windows\Resources\1008.exe
    c:\windows\Resources\1009.exe
    c:\windows\Resources\1010.exe
    
  3. Perform a full scan of the computer using Kaspersky Anti-Virus with up-to-date antivirus databases (download a trial version).

MD5: C68E13B3110B7108C01DC3807A0070E6
SHA1: 4481B06DE14144D5F39005ED011D84EF28AE2B47


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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.


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