Bureau 121 News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> reporter: while the trump team tries to strike a diplomatic deal with kim, new evidence the dictator is acting aggressively in cyberspace. the cyber security firm fireeye has a new report saying a shadowy network of hackers tried to steel over a billion dplars bank from banks around the world.oll from from banks around the world. fireeye says it's likely kim's hackers have successfully stolen over $100 million over the past four years. experts say this is likely the work of an elite hacking unit called bureau 121 from north korea's top intelligence agency. >> they attack banks and financial...

Didn't unlock your compurbt, the payments stopped. >> it was carried out by a cyber war team that experts say has become dangerously proficient. kim jong-un is believed to have an army of 6,000 hackers. the best of them work for an elite unit called bureau 121, the same unit as believed to have sacked sony pictures and has infiltrated systems in other countries. >> they're causing disruption of banks, atm machines in south korea. they're attacking the finance sector and afefting swift, one of the main ways we move money around to do financial heists. >> financial heists designed not just to di...

Trouble here is that they are moving closer in that direction. that's an alarming prospect. >> certainly is. they've surprised a lot of people with what they have been able to achieve over these years to begin with. >> think of all the times they've launched missiles when they launched a satellite successfully into orbit. the expectation was this one is going to blow up. it did not. >> jim sciutto, thanks very much. the united states believes a mysterious north korean agency called bureau 121 is at the heart of north korea's cyber attacks, including the attack on sony pictures because of the...

President to consider. >> we're part of the interagency discussion about the incident and about options that may be available. >> reporter: any military cyber response will be coordinated with the fbi which is leading the investigation. >> we take it very seriously. we will respond proportionally, as i said. >> reporter: one potential, an offensive, u.s. military cyber attack on north korea's limited online capabilities. but it may be tough. >> we know from defectors from this unit called bureau 121 or unit 121, that they have 3,000, 5,000 cyber warriors. they operate out of china, singapore, ...

Iran may indeed have helped. because they have worked together on missile development for many years, because iran has been a major client of north korea weapons. >> reporter: cnn reached out to iranian officials about that. they didn't respond. the white house maintains north korea acted alone. >> we've got no indication north korea was acting in conjunction with another country. >> reporter: north korea denies hacking sony but if pyongyang pulled this off without any outside help, it would be the greatest success for their shadowy hacking group called bureau 121. >> frankly, north korea, pro...