The goal was to alter the speed
of Iranian Uranium-enrichment centrifuges
to degrade that process--but not so much as to be obvious.
http://it.slashdot.org/article.pl?sid=10/11/16/0347231&mode=nested&threshold=5
Theories abound as to the source.
http://it.slashdot.org/article.pl?sid=10/11/16/0347231&mode=nested&threshold=5#34240178
This definitely wasn't some kid in his Mom"s basement.
http://it.slashdot.org/article.pl?sid=10/11/16/0347231&mode=nested&threshold=5#34240968
There are several links there to more-primary sources.
http://it.slashdot.org/article.pl?sid=10/11/16/0347231&mode=nested&threshold=5#34240608