Trojan-Downloader.Win32.Small.cop

Technical Details

This Trojan downloads files via the Internet without the user’s knowledge or consent.

It is a Windows PE EXE file. It is not packed in any way. The file is 3,584 bytes in size.

Payload

Once launched, the Trojan waits for the victim machine to connect to the Internet. It then attempts to download a file from http://**.249.23.82/ntraf12.dat. This file is saved to the Windows temporary directory as "msdoc.exe":

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

The downloaded file is then launched for execution.

The Trojan also sends HTTP requests to a range of URLs. These requests contain the victim machine’s unique identifier.

Removal instructions

1. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
2. Delete the file downloaded by the Trojan:
   %Temp%\msdoc.exe
3. Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).