Hackers exploited previously unknown vulnerabilities in Windows operating systems to propagate Duqu viruses

Microsoft issued a Tuesday announcement that hackers exploited the unknown vulnerabilities in the Windows operating system to spread the Duqu virus. Some security experts say this could lead to a new round of large-scale hacking attacks.

Microsoft says the company is working to address the problem and will release security upgrades to users.

Security software manufacturer Symantec (Symantec) said in October that it found a mysterious computer virus similar to the Stuxnet virus that attacked the Iranian nuclear power plant earlier.

Governments and private researchers around the world are trying to analyse the root causes of Duqu, a preliminary analysis shows that the virus is developed by hackers, mainly attacking nuclear power plants, refineries and pipelines and other important infrastructure systems.

Symantec researchers believe that hackers transmit duqu by sending infected Word documents through mail. Kevin Haley, a researcher at the company, said that when the receiver opened the file, the PC would become infected, and the attacker would be able to control the computer and sneak into the organization's network to steal data.