BackConstruction 
Server name: BackConstruction 
Version: 2.1
Different versions: NA
Tested: Yes, on Windows 95 and Windows NT 
Server size: 185K
Server files: server.exe
Server icon:

Infects: Windows 95/98/ME/NT/2000
Autoloads: Registry: HKEY_USERS\.Default\Software\Microsoft\Windows\CurrentVersion\Run\Key: Shell
Default port: 21(FTP), 666, 5401, 5402 all TCP
Can port be changed: No

Server Features

  • Chat
  • Email using victim
  • File explorer 
  • Get cached passwords 
  • Shutdown/Reboot/Logoff/Poweroff 
  • Start menu on/off
  • View/Kill apps 

 
Comments
BackConstruction is a simple trojan. It can open a FTP server on port 21 that lets anyone on. It also opens the following ports: 666, 5401, 5402 and connects to them when the client is in use. 

How To Remove 
Quick fix: no quick fix programs
Manual removal:

  1. Remove the Shell key located in the registry at: HKEY_USERS\.Default\Software\Microsoft\Windows\CurrentVersion\Run\. And the P23H located at: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\General\Settings\. Which can be done with regedit or any other registry editing program. 
  2. Reboot the computer or close the trojan.
  3. Delete the trojan file Cmctl32.exe in the windows directory. 
Related 
Article: General removal info
Section: Test your knowledge, take our Trojan Quiz
Service: Trojan removal
Service: Tell a friend about this trojan
Service: Print this page
 
 
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