When the first infected document is opened by Word the virus gets control and it checks whether the Global Template file (NORMAL.DOT) is infected. If it is not infected then the virus copies its macros to NORMAL.DOT and there by infecting it. Then onwards the virus will be infecting all the new document files created in that computer.

When an infected document is closed on the 1st day of any month MDMA will display this message:

You are infected with MDMA_DMV.
Brought to you by MDMA (Many Delinquent Modern Anarchists)

The virus will activate its destructive code and the destriction done will vary according to the operating system

In Windows 95 the virus will delete all the Control Panel (CPL) and Help (HLP) files in the Windows directory. The virus will also make some changes to the Windows Registry affecting the Logon, Display and Keyboard settings.

In Windows NT the virus will delete all files in the current directory. Under Windows 3.x the virus will add a line to the AUTOEXEC.BAT file so that all files in the C drive will be deleted the next time the computer is switched on.