Hamster

Threat description

Details

CATEGORYMalware
TYPEVirus

Summary

Hamster is a simple virus found from Norway at the end of April 1993. It managed to become quite widespread through bbs systems. Hamster infects COM-files in the current directory by appending it's own code to the end of the host files and patching the first three bytes to transfer the control to the viruscode.



Removal

Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

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Technical Details

Effective length of the virus is 546 bytes. It will infect all COM files unless they are already infected or if they are EXE files renamed to COM (the virus checks this by the magic number "MZ" in the beginning of EXE files).

Virus will not stay resident in memory, and it seems to infect one file at a time. It will not alter host files time or date fields.

The virus carries the names of the new and old host files within it's code. It also has one text string: "Turbo Hamster Virus!".

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