Trojan-Downloader.Win32.Small.eir

Technical Details
Payload
Removal instructions

Technical Details

This Trojan downloads other programs via the Internet and launches them on the victim machine without the user’s knowledge or consent. It is a Windows PE EXE file. It is approximately 6KB in size. It is written in C++.

Payload

Once launched, the Trojan downloads the following files from the Internet:

http://www.tankersite.com/***/ppp.exe
http://www.tankersite.com/***/ccc.exe
http://www.tankersite.com/***/sss.exe
http://www.tankersite.com/***/loader_b.exe
http://www.tankersite.com/***/temp.exe

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

These files are saved to the Windows root directory as "1.exe", "2.exe", "3.exe", "4.exe" and "5.exe":

%WinDir%\1.exe
%WinDir%\2.exe
%WinDir%\3.exe
%WinDir%\4.exe
%WinDir%\5.exe

Once each file has been successfully downloaded, the Trojan will launch it for execution.

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 files:

   %WinDir%\1.exe
   %WinDir%\2.exe
   %WinDir%\3.exe
   %WinDir%\4.exe
   %WinDir%\5.exe

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