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  Home / Viruses / Virus Encyclopedia

Trojan-Dropper.Win32.Kido.a

Detection added Mar 16 2009
Description added Apr 15 2009

Technical details

This Trojan is designed to install and launch other programs on the victim machine without the knowledge or consent of the user. It is a Windows PE EXE file. It is 78848 bytes in size. It is written in C++.

Payload

Once launched, the Trojan checks the system date. If the date is later than 09.03.2009, the Trojan ceases running and deletes itself. It also checks to see if Net-Worm.Win32.Kido is present on the infected machine.

Once it has completed these checks, it extracts a malicious program from its body which Kaspersky Anti-Virus detects as Trojan-Downloader.Win32.Kido.a and places this file in the current user's Windows temporary directory:

%Temp%\<:rnd>.tmp, with rnd standing for a random string of symbols.

This file is 81408 bytes in size. This file will then be launched for execution.

The Trojan also extracts a batch file from its body and places this file in the current user’s Windows temporary directory:

%Temp%\<rnd>.cmd, with <rnd> being a random string of symbols

This file is 53 bytes in size and used by the Trojan to delete itself.

Once extracted, it is launched for execution and deletes the original Trojan file.

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. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine) if it has not deleted itself.
  2. Delete all files created by the Trojan:
    %Temp%\<rnd>.tmp
    %Temp%\<rnd>,cmd
  3. Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).
 

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