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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.Genome.cfbv

Detected Mar 07 2011 15:14 GMT
Released Mar 07 2011 20:04 GMT
Published Apr 26 2011 13:42 GMT

Technical Details
Payload
Removal instructions

Technical Details

This Trojan installs and launches other programs on the infected computer without the user's knowledge. It is a Windows application (PE EXE file). It is 5120 bytes in size. It is written in C++.


Payload

This Trojan program is injected into the address space of the process "explorer.exe" using a malicious program which is detected by Kaspersky Anti-Virus as Trojan-Downloader.Win32.Small.laa.

When launched, the Trojan downloads two files from the Internet at the following links:

http://c0.sh***ker.net/mn/d.php
http://c0.sh***ker.net/mn/c.php

At the time of writing, these links were inactive.

The downloaded files are saved to the Temporary Internet Files folder under random names.

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

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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.Genome.cfbv (Kaspersky Lab) is also known as:

  • W32/Downloader-Sml!Eldorado (FPROT)
  • DLOADER.Trojan (DrWeb)
  • Generic.Malware.dld!!.48DC2AD4 (BitDef7)
  • processing error (VirusBuster)
  • Win32:Malware-gen (AVAST)
  • Trojan-Downloader.Win32.Genome (Ikarus)
  • Downloader.Generic11.ABY (AVG)
  • Downloader (NAV)
  • NseCheckFile2() returned 0x00010018 (Norman)