Cri-Cri

Classification

Malware

Virus

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Summary

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

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

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.