Trojan-Dropper.Win32.Small.ez

Technical Details

This Trojan is designed to install and launch other programs on the victim machine. It is a Windows PE EXE file. The file is 15,872 bytes in size. It is packed using UPX. The unpacked file is 48 640 bytes in size.

Payload

Once launched, the Trojan extracts the following files from itself and launches them for execution:

• %WinDir%\svchost.exe (This file is 19 968 bytes in size. It will be detected by Kaspersky Anti-Virus as Trojan-Spy.Win32.Tofger.x.)
• %WinDir%\svchost.exe (This file is 20,000 bytes in size. It will be detected by Kaspersky Anti-Virus as not-a-virus:Server-Proxy.Win32.Soppet.a)

The Trojan also extracts the following DLL file from its body:

• %WinDir%\svchost.exe (This file is 3,072 bytes in size. It will be detected by Kaspersky Anti-Virus as Trojan-Spy.Win32.Banker.l.)

In order to ensure that the Trojan is launched automatically when the system is rebooted, the Trojan registers its executable file in the system registry:

Removal instructions

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 files created by the Trojan:
   • %WinDir%\svchost.exe
     
   • %System%\svchostc.exe
     
   • %WinDir%\msrt32.dll
4. Delete the following system registry key parameter:
   [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
   "Systems" = "%WinDir%\svchost.exe"
5. Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).