Blaster Worm

Updated: 09/15/2017 by Computer Hope

Virus information

08/11/2003 - The Blaster worm also known as mblast, lovesan, W32.Blaster.Worm, Worm_mblast.a, and Win32.Posa.worm. The blaster worm is a software worm designed to locate and exploit Microsoft Windows NT, Windows 2000, Windows XP, and Windows Server 2003 through open RPC ports TCP port 135.


Microsoft Windows 95, Windows 98, Windows ME users are not effected by this worm.


Computers infected with this worm may experience the following symptoms:

  1. Computer automatically rebooting every five minutes.
  2. Mblast.exe is located on machine or seen as a TSR.
  3. Computer freezing after first few minutes of booting.
  4. Computer causing an unexpected errors after first few minutes after booting.

How to clean this worm

If you're needing additional help cleaning this page get the Microsoft KB833330 critical update, which is available through Microsoft's update page.