they used a lot of anti-forensic techniques. >> reporter: the hackers stole $81 million from bangladesh central bank. the only known loss so far. another clue which could trace these attacks to north korea, officials at the cyber security firm who have researched the hacks sell the malware code used in bangladesh heist is similar to the code used in the sony pictures hack in 2014, which the fbi blamed on kim's regime. he's likely planning to use the stolen money to pay for his nuclear weapons and missiles programs and to buy cars and other luxury items for north korean elites to keep them from turning on him. analysts say for kim hacking is a fast and easy way to grab illicit cash. >> they tried drug trafficking. they've tried currency counterfeiting. the tradition that will ways of raising money are facing