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Trojan-Downloader.Win32.Small.jk

RISK LEVEL:2



This Trojan downloads other programs via the Internet without the knowledgeor consent of the user and launches them on the victim machine. The programitself is a Windows PE EXE file. It is 36,352 bytes in size. It is writtenin Borland Delphi.

Once launched, the Trojan downloads a file from the following URL:

http://counter.****s.com/2/dk.exe

(At the moment of writing, this link was not working.)

If the file is successfully downloaded, it will be saved to the C: root directoryas alpha.exe:

C:\alpha.exe

The file will then be launched for execution.

The Trojan also adds the following buttons to Internet Explorer:

by creating the following registry keys and parameters:

[HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B1}]
"ButtonText"="SEARCH"
"HotIcon"="shell32.dll,5"
"Icon"="shell32.dll,4"
"Exec"="http://www.google.com.super-fast-search.apsua.com/find.htm"
"CLSID"="{1FBA04EE-3024-11D2-8F1F-0000F87ABD16}"
"Default Visible"="Yes"

[HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B2}]
"ButtonText"="ENTERTAINMENT"
"HotIcon"="shell32.dll,12"
"Icon"="shell32.dll,13"
"Exec"="http://www.google.com.super-fast-search.apsua.com/av.htm"
"CLSID"="{1FBA04EE-3024-11D2-8F1F-0000F87ABD16}"
"Default Visible"="Yes"

[HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B3}]
"ButtonText"="PILLS"
"HotIcon"="shell32.dll,181"
"Icon"="shell32.dll,180"
"Exec"="http://www.google.com.super-fast-search.apsua.com/med.htm"
"CLSID"="{1FBA04EE-3024-11D2-8F1F-0000F87ABD16}"
"Default Visible"="Yes"

[HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B4}]
"ButtonText"="SECURITY"
"HotIcon"="shell32.dll,194"
"Icon"="shell32.dll,45"
"Exec"="http://www.google.com.super-fast-search.apsua.com/check.htm"
"CLSID"="{1FBA04EE-3024-11D2-8F1F-0000F87ABD16}"
"Default Visible"="Yes"

[HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B5}]
"ButtonText"="SEARCH"
"HotIcon"="shell32.dll,157"
"Icon"="shell32.dll,155"
"Exec"="http://www.google.com.super-fast-search.apsua.com"
"CLSID"="{1FBA04EE-3024-11D2-8F1F-0000F87ABD16}"
"Default Visible"="Yes"

The Trojan also creates the following registry keys which will act as redirectswhen Internet Explorer is used:

[HKLM\Software\Microsoft\Windows\CurrentVersion\URL\DefaultPrefix]
"(default)"=http://www.google.com.super-fast-search.apsua.com/c/c.pl?url=

[HKLM\Software\Microsoft\Internet Explorer\Search]
"CustomizeSearch"="http://www.google.com.super-fast-search.apsua.com/search.htm"
"SearchAssistant"=http://www.google.com.super-fast-search.apsua.com/search.htm

[HKCU\Software\Microsoft\Internet Explorer\Main]
"Start Page"=http://www.google.com.super-fast-search.apsua.com/fast-find.htm

[HKCU\Software\Microsoft\Internet Explorer\SearchUrl]
"provider"=""

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

  1. Use Task Manager to terminate the Trojan process.
  2. Delete the original Trojan file (the location will depend onhow the program originally penetrated the victim machine).
  3. Delete the file called alpha.exe from the C: root directory:
    C:\alpha.exe
  4. Delete the following registry keys:

    [HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B1}]

    [HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B2}]

    [HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B3}]

    [HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B4}]

    [HKLM\Software\Microsoft\Internet Explorer\Extensions\{FE5A1910-F121-11d2-BE9E-01C04A7936B5}]

  5. Delete the following system registry key parameters:

    [HKLM\Software\Microsoft\Windows\CurrentVersion\URL\DefaultPrefix]
    "(default)"

    [HKLM\Software\Microsoft\Internet Explorer\Search]
    "CustomizeSearch"
    "SearchAssistant"

    [HKCU\Software\Microsoft\Internet Explorer\Main]
    "Start Page"

    [HKCU\Software\Microsoft\Internet Explorer\SearchUrl]
    "provider"

  6. Update your antivirus databases and perform a full scan of thecomputer (download a trial version of Kaspersky Anti-Virus).


Printed From:http://www.viruslist.com/en/viruses/encyclopedia?virusid=50399


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