Summary
This virus infects on file execution all the files that contain 'MZ' in their first two bytes. It pads the infected files to a paragraph boundary, thus adding up to 15 additional bytes of garbage to them.
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 updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After 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 scanning
If 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
Mr. D will not infect files with internal overlay structure. It will also not infect files with "VIR" in their name
After infecting a file, Mr. D attempts to delete a file with the same name and the first character of the extension replaced by '_'. The virus sets the seconds field in the infected files time-stamp to 4.
The virus contains routines to play with the screen and which are activated on 31st of any month, some time after the virus is installed in memory. Mr. D does not spread before March 18, 1993.
The virus contains the string "Mr. D" unencrypted.
There are two variants.
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