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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.JS.Redirector.os

Detected Dec 27 2010 16:49 GMT
Released Dec 27 2010 21:10 GMT
Published Mar 28 2011 12:41 GMT

Technical Details
Payload
Removal instructions

Technical Details

This Trojan opens different websites in the browser without the user's knowledge. It is an HTML page containing Java Script. It is 2059 bytes in size.


Payload

When an infected page is opened in the user's browser, the following HTML document is displayed:

After the user sends an SMS to the premium rate number, nothing will change on this page. The malware also attempts to execute the script named "fol.js", which is placed on the malicious user's server. This script redirects to other resources, which may contain other malware. At the time of writing, this link was inactive.


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).


[MD5: 105940f88bf45f5889c03ceaafbd5123]
[SHA1: a5aeee877f418aaf5ffbba8e6db2004fa9148ab6]


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Trojan

This type of behaviour covers malicious programs that delete, block, modify, or copy data, disrupt computer or network performance, but which cannot be classified under any of the behaviours identified above.

This classification also covers “multipurpose” Trojan programs, i.e. those that are capable of conducting several actions at once and which demonstrate several Trojan behaviours in a single program. This means they cannot be indisputably classified as having any single behaviour.


Aliases

Trojan.JS.Redirector.os (Kaspersky Lab) is also known as:

  • Trojan.JS.Redirector (Ikarus)
  • NseCheckFile2() returned 0x00010018 (Norman)
  • Trojan.JS.Redirector.os [AVP] (FSecure)