IT security firm McAfee claims to have uncovered one of the largest ever series of cyber attacks.
It lists 72 different organisations that were targeted over five years, including the International Olympic Committee, the UN and security firms.
McAfee will not say who it thinks is responsible, but there is speculation that China may be behind the attacks.
Beijing has always denied any state involvement in cyber-attacks, calling such accusations "groundless".
Speaking to BBC News, McAfee's chief European technology officer, Raj Samani, said the attacks were still going on.
"This is a whole different level to the Night Dragon attacks that occurred earlier this year. Those were attacks on a specific sector. This one is very, very broad."
Dubbed Operation Shady RAT - after the remote access tool that security experts and hackers use to remotely access computer networks - the five-year investigation examined information from a number of different organisations which thought they may have been hit.
2013 BMW 328i M Sport with 8sp in Estoril Blue II
2012 Chrysler 300C SRT8 - Always bet on black
2012 Jeep Wrangler Unlimited Rubicon Call of Duty: Modern Warfare 3 Edition, otherwise known as the MW3 (and badass)
why? they have a large threat intelligence team. That said, this "shady rat" doesn't appear to be anything new but old exploits still kicking around.
2013 BMW 328i M Sport with 8sp in Estoril Blue II
2012 Chrysler 300C SRT8 - Always bet on black
2012 Jeep Wrangler Unlimited Rubicon Call of Duty: Modern Warfare 3 Edition, otherwise known as the MW3 (and badass)
There was some talk of this at BlackHat/DEFCON. I'm actually surprised that they didn't find this type of thing sooner.
Sabre (Julian) 92.5% Stock 04 STI
Good choice putting $4,000 rims on your 1990 Honda Civic. That's like Betty White going out and getting her tits done.
