Threat Description

Quox

Details

Aliases:Quox
Category: Malware
Type:
Platform: W32

Summary



The Quox virus is a reasonably simple diskette and Master Boot Record infector. It is only able to infect a hard disk when you try to boot the machine from an infected diskette. At this time Quox infects the Main Boot Record, and after that it will go resident to high DOS memory during every boot-up from the hard disk.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.



Technical Details



Once Quox gets resident to memory, it will infect practicly all non-writeprotected diskettes used in the machine. Quox-virus is also a stealth virus - if you try to examine an infected boot record, it will show you the original clean one instead.

Quox-virus has no particular payload and no text strings. It does not activate in any way, but it will corrupt some diskettes seriously. The damage might not be visible as long as the virus is resident in memory because of the stealth. When infected diskettes are used in a clean machine, they will typically be unreadable and, due a bug in DOS, may even crash the machine.

Virus was found in Thailand in July of 1992. Virus was named to be "Quox" at the IBM High Integrity Labs because "there was no obvious good name, and we didn't have very many viruses starting in 'Q'", David Chess from IBM commented.





Description Created: Mikko Hypponen, F-Secure


SUBMIT A SAMPLE

Suspect a file or URL was wrongly detected? Submit a sample to our Labs for analysis

Submit Now

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

Learn More