Adri is a Hungarian virus. The virus overwrites the MBR of the first hard drive after one month of the first infection. The virus infects EXE files during execution and appends its excrypted virus body to the end of such files.
It does not display a message when it activates, thus the problem with the hard disk will be visible after booting the PC next time.
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.
Description Details: Analysis: Peter Szor, F-Secure, 1998