Threat Encyclopedia

Selected viruses, spyware, and other threats: sorted alphabetically

Short description
MSIL/LockScreen.A 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.
Installation
Trojan is probably a part of other malware.

The trojan does not create any copies of itself.

The trojan may create copies of the following files (source, destination):
  • c:\windows\down\driver.exe, c:\windows\graphic\driver.exe
The following files are deleted:
  • c:\windows\down\driver.exe
In order to be executed on every system start, the trojan sets the following Registry entry:
  • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
    CurrentVersion\Run]
    "graphic" = "c:\windows\graphic\driver.exe"
Other information
The trojan displays the following dialog box:
When the correct password is entered the trojan is deactivated.

The password to regain access to the operating system is one of the following:
  • kWPi
Some examples follow.
(1.)
(2.)
The trojan creates the following files:
  • c:\windows\graphic\startdvr.dll
  • c:\windows\graphic\starttim.dll
Trojan requires the Microsoft .NET Framework to run.