Threat description


Category: Malware
Type: Virus
Platform: W32
Aliases: Reverse, Red Spider, Redspide


Reverse stays resident in memory and infects COM and EXE files when they are accessed.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.


More information on 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.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

Reverese is encrypted with a variable key. The body of the virus contains two filenames written backwards:

    moc.dnammoc       exe.niamcn  

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  

Description Details: Mikko Hypponen, F-Secure


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