1. Skip to navigation
  2. Skip to content
  3. Skip to secondary-content

Where You Are

  1. Labs
  2. Threats
  3. Virus and threat descriptions
  4. WinShell.50

WinShell.50

Name : WinShell.50
Size:37,888 Bytes
Category:Trojan
Type:Backdoor
Platform:Win32
Date of Discovery:July 11, 2002

Summary

WinShell.50, a variant of WinShell, is a Trojan. WinShell.50 allows an attacker to get full control over the infected system and starts to listen to random port. WinShell.50 listens to remote commands and can be used to get access to an infected system and creates Registry keys to start the file automatically.

Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.

Additional Details

WinShell.50 creates the following autostart registry entry to enable its automatic execution upon start:

  •  [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
    StarWind = [Malware path and filename]


Aside from the above-mentioned registry entry, it also registers itself as a service that automatically starts upon boot:

  •  [HKLM\SYSTEM\CurrentControlSet\Services\StarWindService]
    ServiceName = "StarWindService"
    DisplayName = "StarWind iSCSI Service"
    StartType = SERVICE_AUTO_START
    Path = [Malware path and filename]


WinShell.50 opens a random port and waits for the attacker to connect to it. The correct password is required in order for the hacker to have access to the backdoor.

The password is: !QAZ1qaz@


These are the actions that can be remotely executed by the hacker:

  •  Download files
  •  Exit
  •  Reboot the system
  •  Remove the malware
  •  Shell commands
  •  Show the path of the malware
  •  Shutdown the system


The malware executes remote commands by using the following programs:

  •  cmd.exe
  •  command.exe

Detection

F-Secure Anti-Virus detects this malware with the following updates:

[FSAV_Database_Version]

Version = 2006-09-18_01.