Den Zuk


This virus will seek out and destroy copies of the Brain virus. If it finds a Brain-infected diskette, it will remove the infection, and replace it with a copy of itself. This virus hides on track 40 on diskettes, but normally 360K diskettes only have tracks numbered 0 to 39. This virus does not infect 1.2M or 3.5" diskettes correctly, but will destroy data on them. The volume label "(c) Brain" on an infected diskette would be changed to


This is because YC1ERP is the call-sign of the author, Denny Yanuar Ramdhani.


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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User Guide

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

On a computer infected with this virus, pressing Ctrl-Alt-Del will not result in a simple reboot. Instead the text "DEN ZUK" will appear on the screen for a fraction of a second.

Then the computer will appear to reboot, but the virus will remain in memory.

Pressing Ctrl-Alt-F5 will produce a "true" reboot.

Variant:Ohio (Hacker)

This is an older version of the Den Zuk virus and is written by the same author. Den Zuk will also remove the "Ohio" virus if it is found.

The Mardi Bros virus appears related as well.

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