This virus stays resident in memory and infects EXE files when they are executed.
Uddy activates when an infected program is executed after the first of January, 1998. At this time the virus overwrites part of the hard drive with text "UDDY UDDY UDDY", then displays "UDDY" on screen and hangs the machine.
Uddy.2617 was reported to be in the wild in USA in April 1996.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Description Created: Analysis: Peter Szor, F-Secure, 1996