Threat Description



Category: Malware
Type: Virus
Platform: W32


This virus is polymorphic full-stealth infected of COM and EXE files and floppy disk bootsectors.


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

Although the decryptor is polymorphic, the encryption used is simple xor with a variable key. Filesize increase is constant (4616 bytes).

Floppy boot sectors are infected whenever floppies accessed. Virus writes it's own code to the end of the floppy disk, original bootsector is relocated to the end of the root directory.

Cri-Cri infects files between approximately the sizes of 10000 and 60000 bytes.

The virus allocates 10kb of RAM while resident.

Cri-Cri activates on the 4th of June displaying this text in green color to the middle of the screen:

     Cri-Cri ViRuS by Griyo96 ...tried, tested, not approved  

Cri-Cri is written by the Spanish 29A virus group.

This virus was found in November 1996 on S3-Trio64 Chinese Windows 3.1 setup disks.

Technical Details:Peter (, Australian F-Secure Support


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