No, it's not. TorqueScript, or what add-ons are coded in, cannot do anything virus related. It CAN delete files, but only inside the Blockland directory. You cannot execute a .exe file directly from Torquescript, either. You'd need to go through the trouble of coding a self-starting .exe, as well as coding a TCP object to download it.
tl;dr: No. Nobody would put the effort into making a virus for Blockland.