Trojan-Downloader.Win32.Small.bab

Technical Details

This Trojan downloads other files via the Internet and launches them for execution on the victim machine without the user’s knowledge or consent. It is a Windows PE EXE file. It is 8192 bytes in size.

Installation

Once launched, the Trojan causes the following message to be displayed:

The Trojan then copies its executable file as follows:

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 also creates the following registry key:

which contains a link to the Trojan's executable file.

Payload

The Trojan downloads a file from the following link:

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

The Trojan then saves the downloaded file to the current user's temporary directory (%Temp%) under a temporary name.

The Trojan also opens the following links without the user’s knowledge or consent:

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. Use Task Manager to terminate the Trojan 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]
   "{357AA41A-B7A8-4632-A27D-5B980B25CF43}" = "%System%\drivers\services.exe"
4. Delete the following system registry key:
   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Update]
5. Delete the following file:
   %System%\drivers\services.exe
6. Delete the contents of %Temp%.
7. Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).