Reverse stays resident in memory and infects COM and EXE files when they are accessed.
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.
Reverese is encrypted with a variable key. The body of the virus contains two filenames written backwards:
COMMAND.COM is infected by overwriting a block of zeroes inside it. NCMAIN.EXE is not infected at all.
Reverse contains the following text, which is not displayed:
Reverse-948 Created by Renata G. from Lubin City in Sept 1993
Similar and also 948 bytes, but contains this text:
Red Spider Virus created by Garfield from Zielona Gora in Feb 1993