Win32/LockScreen [Threat Name] go to Threat

Win32/LockScreen.QT [Threat Variant Name]

Category trojan
Size 202240 B
Detection created Mar 28, 2010
Detection database version 4980
Aliases Trojan-Ransom.Win32.XBlocker.br (Kaspersky)
  Trojan.Gen (Symantec)
  Trojan.MulDrop1.10175 (Dr.Web)
Short description

Win32/LockScreen.QT 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 removes itself from the computer.

Installation

The trojan does not create any copies of itself.


In order to be executed on every system start, the trojan sets the following Registry entry:

  • [HKEY_LOCAL_MACHINE\­Software\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "mon.exe" = "%malwarepath%"

The trojan creates the following files:

  • %currentfolder%\­tit.gif
Other information

The trojan displays the following dialog box:

When the correct password is entered the trojan removes itself from the computer.


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

  • 899788

The trojan can open the following URLs:

  • http://sex27.info
  • http://www.keezmovies.com
  • http://www.xxnum.com

The following programs are terminated:

  • TASKMGR.EXE
  • REGEDIT.EXE
  • REGEDIT32.EXE
  • MSCONFIG.EXE

The trojan may create the text file:

  • %temp%\­test.tst

It contains the following text:

  • test

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