Welcome to the Virus Encyclopedia of Panda Security.
|Effects: ||It infects the executable files (programs) stored in the Windows and System directories.|
|First detected on:||May 16, 2003|
|Detection updated on:||Jan. 17, 2006|
|Yes, using TruPrevent Technologies
Valla is a direct action virus, this means that it carries out it infection immediately, attacking other programs. Its most destructive action consists of infecting the programs stored in the Windows and System directories.
It is very easy to become infected by Valla, as it uses many different means to spread: e-mail messages with infected attachments, computer networks, Internet downloads, FTP, floppy disks, etc.
Valla is difficult to identify, as it does not display any warnings or messages that indicate that it has reached a computer.