I-Worm.Win32.Lirva.A spreads itself via email.

Subject :

- Fw: Prohibited customers...
- Re: Brigade Ocho Free membership
- Re: According to Daos Summit
- Fw: Avril Lavigne - the best
- Re: Reply on accou..

T-Rex.1800 is a DOS memory-resident virus.

It infects ".COM" and ".EXE" files. However, this virus does not infect "COMMAND.COM" and files with the text string WIN and F-PROT in it.

T-Rex.1800 is a DOS memo..