Tentatrickle, Tentacle_III


This DOS-based virus was found in the wild in September 1996.

The virus infects only DOS executables (MZ). The virus adds a new segment to the executable and modifies the structure of the file.

Tentacle causes no obvious symptoms, except slowing the PC down (the infection process is slow). It does interfere with handling of GIF files.


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.

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Technical Details

Tentatrickle contains these texts:

Your system is contamined with the Tentacle Virus.
 IMPORTANT: Don't open any GIF file!

The author of this virus also wrote the Tentacle and Shell viruses.

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