MSIL/LockScreen [Threat Name] go to Threat

MSIL/LockScreen.H [Threat Variant Name]

Category trojan
Size 31232 B
Detection created May 16, 2010
Detection database version 5118
Short description

MSIL/LockScreen.H 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.

Installation

The trojan does not create any copies of itself.


The following Registry entry is set:

  • [HKEY_LOCAL_MACHINE\­SOFTWARE\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "System" = ""
  • [HKEY_LOCAL_MACHINE\­SOFTWARE\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "System32" = ""
  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows\­CurrentVersion\­Policies\­System]
    • "DisableTaskMgr" = 1

The modified Registry entries will prevent specific files from being executed.

Other information

MSIL/LockScreen.H 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.


The trojan displays the following picture:

When the correct password is entered the trojan is deactivated.


The password to regain access to the operating system is one of the following:

  • marek
  • 5d8w6y9s

The trojan may turn off the computer.


Trojan requires the Microsoft .NET Framework to run.

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