Detection added	Sep 25 2007 23:29 GMT
Update released	Sep 26 2007 01:00 GMT
Description added	Oct 20 2008
Behavior	TrojanDownloader

• Technical details
• Payload
• Removal instructions

This Trojan downloads another malicious program via the Internet and launches it on the victim machine without the user’s knowledge or consent. It is a Windows PE EXE file. It is 133120 bytes in size.

Installation

When launched, the Trojan copies its executable file to the Windows root directory:

In order to ensure that the Trojan is launched automatically each time the system is booted, the Trojan adds a link to its executable file in the system registry:

The Trojan adds a rule to Windows Firewall which permits any network activity caused by the malicious process.

The Trojan downloads files from the following URLs:

http://www.site*****.com/top7_1.gif
http://www.site*****.com/top7_2.gif
http://www.sugo*****.kr/bbs/icon/private_name/top7_1.gif
http://www.sugo*****.kr/bbs/icon/private_name/top7_2.gif

At the moment of writing, these links were not working.

Downloaded files will be saved as:

C:\Documents and Settings\All Users\winsql.dat
C:\Documents and Settings\All Users\DirectX.aud
C:\Documents and Settings\All Users\services.exe
C:\Documents and Settings\All Users\comctl64.dll

Once successfully downloaded, the files will be launched for execution.

The Trojan also opens the following link without the user’s knowledge or consent.

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. Use Task Manager to terminate the malicious program’s process.
2. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
3. Delete the following system registry key parameter:

   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "IE" = "%WinDir%\iexplorer.exe"

4. Delete the following files:

   %WinDir%\iexplorer.exe
   C:\Documents and Settings\All Users\winsql.dat
   C:\Documents and Settings\All Users\DirectX.aud
   C:\Documents and Settings\All Users\services.exe
   C:\Documents and Settings\All Users\comctl64.dll

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