Was North Korea Behind September 11, 2008, Electronic Run On US Banks?

We, meaning the American public, still do not know who was responsible for the September 11, 2008 electronic run on the American banks that precipitated the financial crash. Presumably the Federal Reserve and the Intelligence Agencies know; after all, the Fed can track the account numbers involved. Now we have hacking attacks on US and South Korean government computers and private financial institutions, beginning on July 4, rendering some of them inaccessible for several days. Evidence points to the North Koreans. Well, ask the next question, were the Norks behind the September 11 attacks? They are believed to be the world's largest counterfeiter of foreign currency, including treasury and bank notes, so they aren't unfamiliar with criminal manipulation of international currencies.  If they were responsible for these attacks, were they acting alone? Why aren't these questions being investigated by the MSM? Why isn't the US public being told?