Langner said the US is the main driver behind the creation of the worm.
Langner said, "My opinion is that Mossad [Israel's intelligence agency] is involved."
"There is only one leading source, and that is the United States."
Langner added the worm works by showing fabricated readings to trick human operators who think that the machines are working correctly, while the worm affects the processes. He also said that the developers had access to sensitive protected information.
Langner said, "It was engineered by people who obviously had inside information."
"They probably also knew the shoe size of the operator."
Now researchers at Symantec say that they've identified an early version of the worm that was created in June 2009, and that the malicious software was then made much more sophisticated in the early part of 2010.
This earlier version of Stuxnet acts in the same way as its current incarnation -- it tries to connect with Siemens SCADA (supervisory control and data acquisition) management systems and steal data -- but it does not use some of the newer worm's more remarkable techniques to evade antivirus detection and install itself on Windows systems. Those features were probably added a few months before the latest worm was first detected, said Roel Schouwenberg, a researcher with antivirus vendor Kaspersky Lab. "This is without any doubt the most sophisticated targeted attack we have seen so far," he said.
After Stuxnet was created, its authors added new software that allowed it to spread among USB devices with virtually no intervention by the victim. And they also somehow managed to get their hands on encryption keys belonging to chip companies Realtek and JMicron and digitally sign the malware, so that antivirus scanners would have a harder time detecting it.
Realtek and JMicron both have offices in the Hsinchu Science Park in Hsinchu, Taiwan, and Schouwenberg believes that someone may have stolen the keys by physically accessing computers at the two companies
Originally posted by Danbones
if you are experienced in this line of technology
I don't have to tell you:
you know that such a virus can not be created at random...
Symantec discovers 2005 US computer virus attack on Iran nuclear plantsInternet security firm finds early 'Stuxnet O.5' version revealing espionage and sabotage virus released under George W Bush
But the computer virus, one of the most visible forms of a cyberwar that is increasingly raging between nation states