A series of 8 boring viruses.
This virus has nothing to do with Hadra (also know as I-Worm.Hydra) worm. Further information about it is available at: http://www.F-Secure.com/v-descs/hadra.shtml
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.