This is a buggy direct action infector of COM files. It activates on October 21st and attempts to overwrite the hard drive. After this it displays this text and hangs the PC:
Happy Birthday Freaky!
Disinfection & Removal
Glupak also contains this encrypted text which is never shown:
[TV.Suicidal.Dream.B] (c) 1996 The Freak/The Underground From the hypnotic spectre of wake I scream locked in depths of suicidal Dream
The virus might also delete *.ZIP and ANTI-VIR.DAT files.
Glupak was confirmed to be in the wild in Switzerland and Finland in April 1996.
There is another 890 byte variant with slightly different texts inside.
Description Created: Mikko Hypponen, F-Secure