BEIJING: The much-feared new cyber-weapon, the ‘ Superbug ’, which has attacked over six million personal and almost 1,000 corporate computers in China has been traced to the US, official media reported.The Stuxnet cyberworm can break into computers and steal private information, especially from industrial firms, sending it back to a server in the United States, state-run Xinhua news agency quoted Wang Zhantao, an engineer at the Beijing-based Rising International Software Co Ltd , an antivirus service producer in China, as saying.The super virus made use of a bug in Siemens auto-control systems used in industrial manufacturing to skip the security check, Wang who has been vastly quoted in the local media for the past few days, said.The virus can copy itself and spread via U-disk in the network of a company.“Hackers may take control of a company's machinery run under computers infected by Stuxnet, and give dangerous orders causing serious damage,” he said.Official media has been carrying reports about the superbug virus for the past few days said it contained sophisticated malicious software, or malware, believed to be a “new cyber-weapon”, which infiltrates mainly factory computers in China threatening the country’s national security.