Threat Description



Category: Malware
Type: Virus
Platform: W32
Aliases: Error_vir, JH


JH, known also as Error, was found to be in the wild in Finland at the end of August 1994. The virus might have been written in Finland.


Automatic action

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

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

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

JH stays resident in memory and infects EXE files. The files get infection almost every time they are accessed. Copying or renaming is will do the job. Virus avoids infecting some anti-virus programs.

The virus activates any time at September. It shows the following text in the middle of the screen written in red colour:

     -=  ERROR Virus Version 0.1B (C) 1994 JH  =-  

Description Details: Mikko Hypponen, F-Secure


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