While the leaked diplomatic cables published this week by Wikileaks have been roiling the global political scene, bank executives should be on guard. Wikileaks founder Julian Assange just announced that he has a trove of documents revealing unethical behavior at one of the largest banks in the U.S. In an interview with Forbes, Assange declined to name the bank. But he hinted at it's identity. It is one of the biggest banks in the country. It still exists—ruling out Bear Stearns, Merrill Lynch or Lehman Brothers. That leaves us with a handful of candidates: Citigroup, JP Morgan Chase, Wells Fargo, Bank of America, Morgan Stanley, and Goldman Sachs. Assange says he has tens of thousands of documents showing an "ecosystem of corruption." The publication will prompt investigations and reforms, according to Assange.