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


Detected Aug 19 2010 01:31 GMT
Released Aug 19 2010 13:08 GMT
Published Oct 26 2010 08:25 GMT

Technical Details
Removal instructions

Technical Details

This Trojan downloads another program to the computer and launches it for execution without the user's knowledge. It is an HTML document containing Java Script. It is 368 bytes in size.


When an infected page is opened, the Trojan decrypts its obfuscated code using Java Script. The Trojan then redirects the user to the resource located at the following link:

This link leads to an HTML page. When this page is opened, the following message is displayed:
The following resource is accessed in a hidden frame:
The Trojan then downloads a page from the URL shown below:
This link opens a fraudulent site that imitates the activity of an antivirus scanner. The user is also asked to download the file "antivirus.exe" from the following link:
This file is 165 376 bytes in size. It is detected by Kaspersky Anti-Virus as Trojan.Win32.FraudPack.bhmw.

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. Empty the Temporary Internet Files directory, which may contain infected files (see How to delete infected files from Temporary Internet Files folder?):
    %Temporary Internet Files%
  3. Perform a full scan of the computer using Kaspersky Anti-Virus with up-to-date antivirus databases (download a trial version).

[Description: Shcherbina Artem, 30th of August, 2010]
[MD5: 4e5089eb109704f507e4e29c482c7634]

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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


Trojan-Downloader.JS.Agent.fnr (Kaspersky Lab) is also known as:

  • Troj/Iframe-EZ (Sophos)
  • Trojan:JS/Redirector.MO (MS(OneCare))
  • JS.Redirector.72 (DrWeb)
  • JS/Kryptik.M.Gen trojan (Nod32)
  • Trojan.Script.472404 (BitDef7)
  • JS:Redirector-DQ [Trj] (AVAST)
  • HTML/IFrame.AZ (AVIRA)
  • Suspicious_Gen2.DPNSP (Norman)
  • Trojan-Downloader.JS.Agent.fnr [AVP] (FSecure)
  • JS_REDIRECTOR.DA (TrendMicro)