The hacking attack on three South Korean broadcasters and at least two banks
could be one of the largest operations of its kind. Here are some of the
most significant security breaches of recent years.
South Korean authorities have suggested that North Korea was behind
the
attacks, which crippled computer networks at three broadcasters and two
banks. That wouldn't be the first time a state has been implicated in a
hacking operation but it might not be the biggest hacking attack. Here are
five major attacks from recent years.
1. Operation Shady RAT
Last year security firm McAfee revealed details of Operation Shady RAT (RAT is
an acronym for Remote Access Tool), a hacking campaign that took place over
several years. The networks of 72 organisations across the world were
targeted in the campaign which began in mid-2006, or perhaps earlier, and
continued until at least 2010. Targets included the United States
government, the UN, 12 US defence contractors and several technology firms.
McAfee said it believed that a "state actor" was behind the attacks
and that it was impossible to say how much data was stolen. Though McAfee
declined to say which country was behind the attacks, most experts believe
China to be the most likely perpetrator.
2. TJX
The precise details of large-scale financial hacks are often kept private but
there are several attacks that are contenders for the title of 'most
expensive hack'. One is the 2007 attack on American firm TJX, which was
mounted from an insecure WiFi network in one of the company's TJ Maxx shops.
More than 45 million people had their credit card details stolen and some
experts said the actual figure was likely to be closer to 94 million.
3. Heartland Payment Systems
This New Jersey payment processing firm lost data on tens of millions of
credit cards in an attack in 2009. Around 175,000 businesses were affected
by the theft, which was led by hacker Alberto Gonzalez, who was also
implicated in the TJX attack.
4. Epsilon
The world's largest email marketing firm, Epsilon, confirmed in 2011 that it
had been the target of hackers. Only names and email addresses were stolen
from the firm, which handles more than 40 billion emails every year more
than 2,000 brands worldwide including Marks and Spencer. The scale of the
theft was unprecedented.
5. Sony PlayStation Network
In 2011, hackers gained access to Sony's PlayStation Network, putting at risk
credit card data for more than 70 million people. The gaming service was
closed for weeks and customers were eventually compensated with free games
and subscriptions. Though the culprits were never caught, it is now believed
that no data was stolen and the attack was intended to simply embarrass
Sony.