It causes important damages in the system, as it overwrites part of the MBR (Master Boot Record), preventing the computer from being started. It is programmed to do this around 7 or 10 days after being run.

Windows 2003/XP/2000/NT/ME/98/95/3.X; IIS

Mseus.A is a virus with worm characteristics that causes important damages in the computer, as it overwrites part of the MBR (Master Boot Record). This way, the computer cannot even be started.

However, this does not occur immediately after the malware is run, as it remains latent during 7 or 10 days and it's then when the MBR is partially overwritten, leaving the computer useless.

Mseus.A spreads through removable drives and shared folders. It can also reach the computer downloaded from certain websites or received via email.

Mseus.A is easy to recognize, as it can reach the computer:

• Passing itself off as an intelligence test that can be downloaded from certain websites or distributed via email.
  
  When it is run, a folder called IQTEST is displayed. This folder contains an executable file called IQTEST.EXE, which is actually an intelligence test and a text file which contains several instructions:
  
  
• Passing itself off as a self-extractor file compressed with password: