Win32/LockScreen [Threat Name] go to Threat

Win32/LockScreen.T [Threat Variant Name]

Category trojan
Size 18432 B
Detection created Jun 12, 2009
Detection database version 4151
Aliases Trojan-Ransom.Win32.BlueScreen.da (Kaspersky)
  Trojan.Winlock.102 (Dr.Web)
  TROJ_RANSOM.EA (TrendMicro)
Short description

Win32/LockScreen.T 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. The file is run-time compressed using UPX .

Installation

When executed, the trojan copies itself into the following location:

  • %appdata%\­%variable%.exe (18432 B)

A string with variable content is used instead of %variable% .


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

  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "wsock" = "%appdata%\­%variable%.exe"
Other information

The trojan displays the following dialog box:

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


The trojan disables the following key combinations: ALT + F4 .

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