Trojan.Win32.Small.nt

Technical Details
Payload
Removal instructions

Technical Details

This Trojan is a Windows PE EXE file. The file is 9,216 bytes in size. It is not packed in any way. It is written in Assembler.

Payload

When launching, the Trojan drops a file called "sexxx.exe" to the Windows temporary directory (%Temp%):

%Temp%\sexxx.exe – this file is 6,849 bytes in size.

The Trojan then adds the following value to the system registry, ensuring that it will be launched each time Windows is booted on the victim machine:

[HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
"sexxx.exe" = "%Temp%\sexxx.exe"

This ensures that the Trojan will be launched each time Windows is booted on the victim machine.

Due to errors in the Trojan's code, it has no other malicious payload.

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).
2. Delete the following file:

   %Temp%\sexxx.exe

3. Delete the following parameters from the system registry (see What is a system registry and how do I use it for details on how to edit the registry).

   [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
   "sexxx.exe"

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