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F-Secure Virus Descriptions : Tentatrickle





NAME:Tentatrickle
ALIAS:Tentacle_III
SIZE:10496
TYPE:Resident EXE-files

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.

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.

[Analysis: Mikko Hypponen, F-Secure]