Summary
This type of virus infects the Master Boot Record or DOS Boot Record of a hard drive, or the Floppy Boot Record of a floppy drive.
Removal
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.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
- Check for the latest database updatesFirst, check if your F-Secure security program is using the latest updates, then try scanning the file again.
- Submit a sampleAfter checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
- Exclude a file from further scanningIf you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.Note: You need administrative rights to change the settings.
Technical Details
How a boot virus infects
- The MBR is the first sector of a hard drive and is usually located on track 0. It contains the initial loader and information about partition tables on a hard disk.
- The DBR is usually located a few sectors (62 sectors after on a hard disk with 63 sectors per track) after the MBR, and contains the initial loader for an operating system and logical drive information.
- The FBR is use for the same purposes as DBR on a hard drive, but it is located on the first track of a diskette.
- An overwriting boot virus overwrites MBR, DBR or FBR sector with its own code, while preserving the original partition table or logical drive information.
- A relocating boot virus saves the original MBR, DBR or FBR somewhere on a hard or floppy drive. Sometimes, such an action can destroy certain areas of a hard or floppy drive and make a disk unreadable.
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