Russia is 80 per cent likely to be the origin of the Mydoom worm. A Russian security firm Kaspersky Labs said it had traced the first e-mails infected with Mydoom to addresses with Russian Internet providers. ‘‘We have special software to monitor Internet traffic. This detected that the first e-mails infected by the worm came from Russian providers,’’ the firm’s spokesman Denis Zenkin, said. ‘‘But an attempt to mislead is still 20 per cent likely. Virus programmers could have registered an e-mail address in Russia and sent the programmes via it.’’ Microsoft offers $250,000 reward for information on MyDoom virus author