The MTZ virus is benign, becoming memory resident when executed. It then infects .COM files and waits for a warm reboot (CTRL ALT DEL). When a warm reboot is requested by the user, the virus activates by hanging the machine and displaying a message, all the while playing bits of garbage through the PC speaker. This can be cleared by restarting with a cold reboot.
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Virus.DOS.MTZ is a memory resident parasitic polymorphic encrypted virus on DOS. There are...