 However, based on the modular structure of Duqu, special payload could be used to attack any type of computer system by any means and thus cyber-physical attacks based on Duqu might be possible.However, use on personal computer systems has been found to delete all recent information entered on the system, and in some cases total deletion of the computer's hard drive.Internal communications of Duqu are analysed by Symantec, but the actual and exact method how it replicates inside an attacked network is not yet fully known.