Win32/Virlock [Threat Name] go to Threat
Win32/Virlock.A [Threat Variant Name]
Available cleaner [Download Virlock Cleaner ]
|Detection created||Nov 21, 2014|
|Signature database version||10761|
Win32/Virlock.A is a polymorphic file infector. After a certain time delay, the virus blocks access to operating system. To regain access to the operating system the user is asked to send information/certain amount of money via the Bitcoin payment service.
When executed, the virus creates the following files:
- %allusersprofile%\%variable1%\%variable2%.exe (Win32/Virlock.A)
- %userprofile%\%variable3%\%variable4%.exe (Win32/Virlock.A)
A string with variable content is used instead of %variable1-4 .
In order to be executed on every system start, the virus sets the following Registry entries:
- "%variable2%.exe" = "%allusersprofile%\%variable1%\%variable2%.exe"
- "%variable4%.exe" = "%userprofile%\%variable3%\%variable4%.exe"
Win32/Virlock.A is a polymorphic file infector.
The virus searches local and network drives for files with one of the following extensions:
It avoids files which contain any of the following strings in their path:
When the virus finds a file matching the search criteria, it overwrites its content.
The original file is embedded in the newly created file in an encrypted form.
The file name and extension of the newly created file is derived from the original file/folder name.
An additional ".exe" extension is appended.
Win32/Virlock.A is a virus that blocks access to the Windows operating system.
To regain access to the operating system the user is asked to send information/certain amount of money via the Bitcoin payment service.
The virus may display the following dialog windows:
The virus acquires data and commands from a remote computer or the Internet.
The virus contains a list of (3) URLs. The HTTP protocol is used in the communication.