Threat Encyclopedia

Selected viruses, spyware, and other threats: sorted alphabetically

To regain access to the operating system use the key generator which can be downloaded here .
Short description
Win32/LockScreen.AL is a trojan that blocks access to the Windows operating system. To regain access to the operating system the user is asked to send an SMS message to a specified telephone number in exchange for a password. When the correct password is entered the trojan is deactivated. The file is run-time compressed using UPX .
Installation
When executed, the trojan copies itself in the %appdata% folder using one of the following filenames:
  • ffptd.exe
  • loumg.exe
  • ttvao.exe
  • ukdne.exe
In order to be executed on every system start, the trojan sets the following Registry entry:
  • [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\
    Run]
    "wscco" = "%appdata%\%filename%.exe"
A string with variable content is used instead of %filename% .
Other information
The trojan displays the following dialog box:
When the correct password is entered the trojan is deactivated.

To regain access to the operating system one of the following passwords can be used:
  • 5748839
The trojan disables the following key combinations: ALT + F4 .