1) Exploit-based worm 
Doomjuice is a variant of the Mydoom computer worm, in two variants known as Doomjuice.A or Doomjuice.B. It infects Microsoft Windows utilizing the ports left open by the Mydoom.A and Mydoom.B worms. This worm also launches a Denial of Service (DoS) attack on the Microsoft Web site. The Doomjuice variants are currently spreading to computers that ...