Researchers at the Russian-based IT security company Kaspersky Lab have revealed that the people responsible for two powerful malware threats, Flame and Stuxnet/Duqu, must have worked together at some point because of the discovery of shared source code.
Alexander Gostev, Kaspersky Lab's chief security expert, said: "The new findings that reveal how the teams shared source code of at least one module in the early stages of development prove that the groups co-operated at least once."
Vitaly Kamluk, the firm's chief malware expert, said: "We think that these teams are different; two different teams working with each other, helping each other at different stages."