Threat Encyclopedia

Selected viruses, spyware, and other threats: sorted alphabetically

Short description
Win32/LockScreen.ES 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 creates the following files:
  • %temp%%variable1%.exe (42496 B)
  • %temp%%variable2%.exe (45056 B)
  • %temp%%variable3%.dll (463872 B)
  • %windir%TasksSysteCheck.job
A string with variable content is used instead of %variable1-3% .

The trojan schedules a task that causes the following file to be executed repeatedly:
  • %temp%%variable2%.exe (45056 B)
Other information
The trojan displays the following dialog box:
When the correct password is entered the trojan is deactivated.

The trojan may create the following files:
  • %windir%xstopit