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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.JS.Agent.bxr

Detected May 19 2008 10:20 GMT
Released May 26 2008 08:15 GMT
Published Oct 06 2008 08:04 GMT

Technical Details
Payload
Removal instructions

Technical Details

This Trojan downloads another malicious program via the Internet and launches it on the victim machine without the user’s knowledge or consent. It is a Visual Basic Script file. It is 1159 bytes in size.


Payload

The Trojan downloads a file from the following link:

http://veryblomar.com/*****/load.php

The file is then saved as follows:

%Documents and Settings%\Local settings\Temporary Internet Files\svchosts.exe

The file is then launched for execution.

At the moment of writing, the link was not active.


Removal instructions

If your computer does not have an up-to-date antivirus, or does not have an antivirus solution at all, follow the instructions below to delete the malicious program:

  1. Use Task Manager to terminate the malicious program’s process.
  2. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
  3. Delete the following file:
    %Documents and Settings%\Local settings\Temporary Internet Files\svchosts.exe
  4. Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).

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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.JS.Agent.bxr (Kaspersky Lab) is also known as:

  • Mal/ObfJS-S (Sophos)
  • VBS.Psyme.554 (DrWeb)
  • JS/Spy-Agent.bw.dldr (NAI)