The questions stem mainly from the fact that so far, there has been very little information about Duqu's true purpose.

Symantec, which released a earlier this week, has said the Trojan was created to steal information from industrial control system (ICS) vendors.

The security vendor said its analysis found that the malware was likely created by the authors of the Stuxnet worm that disrupted operations at Iran's nuclear facility in Natanz last year.

Symantec said it believes Duqu is being used to steal ICS data that can be used to create another to attack critical infrastructure targets.

Symantec has yet to disclose what it may know about Duqu's potential targets.