April 1. EXE
This virus functions in the same way as the April 1. COM virus, displaying
APRIL 1ST HA HA HA YOU HAVE A VIRUS.
on April 1st. Those two viruses were later combined into one, called SURIV 3, which evolved into the Jerusalem virus.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.