The most famous cyber attacks in history: large companies hacked


The International Information Security Day is celebrated on November 30. A celebration that arose as a result of the first case of malware of network propagation that was registered in the world.

Currently the Cybercrime is hitting the Spanish business sector hard. Prosegur, as before Prisa, Everis and Sacyl, has been forced to close its services for a cyber attack with ransomware.

We know the data:cybersecurity incidents have grown 43.65%. In addition, not only are large companies affected, but SMEs and private users are the main targets of cyber attacks, with a total of 102,414 incidents recorded in Spain last year.

Globally the figures do not improve: there have been 350% more attacks of ransomware (about 74.15 billion euros in losses). We are increasingly connected (to more devices, to more apps, to more messaging systems), so cybercriminals find more and more 'open doors'.

In the recent history of the internet there have been some very famous cases related to cybercrime. Even making large investments in security systems on-line, few companies have escaped this scourge.


Cybersecurity is one of the biggest concerns of the 21st century.

He ransomware 'WannaCry 'caused losses of 3.5 billion euros infecting 300,000 computers in 150 countries in 2017, including those of the Spanish multinational. Encrypted all the data of the equipment so that the user could not access them except with a password that they could only obtain prior payment of a ransom, which was $ 300 in bitcoin per PC 'hacked'.

Sony Pictures

In 2014 a group of hackers achievement take over a large part of your database and leaked a multitude of information online, from internal company documents, such as the payroll of the CEO or personal information of the workers, to several movies that had not yet been released on the billboard. After lengthy investigations, the FBI accused North Korea of being responsible for cyberattack. Losses were calculated at more than 200 million dollars.

Ashley Madison

This dating platform for married people suffered a major setback in 2015. A group of hackers -'The Impact Team'- exposed on the internet the personal and financial data of the more than 37 million customers of the company. From their names and surnames -some of them well known- up to their sexual fantasies more intimate It cost more than 30 million dollars.

Playstation network

This ‘hacking’ took place in 2011 and was a drama for users: 77 million accounts went offline for almost a month. A large security breach that leaked data such as names, passwords, emails, bank information addresses and purchase history. Sony confirmed that the attack had meant around 100 million euros.



It was a very media case because it affected Hollywood celebrities like Jennifer Lawrence, Kate Upton, Kim Kardashian or Kirsten Duns. In 2014, a cybercriminal he stole intimate photos from the actresses' phones and spread them online. Using social engineering, the hacker cheated the victims to access their passwords and thus subtract the compromised images.


Some 3,000 million users were affectedfor cyber attack Yahoo in 2013. Stolen data included passwords and personal information, but no bank information, and the author was not identified. One year later, in 2014, a new hacking -which could be perpetrated by a foreign government- stole private information from 500 million accounts. Yahoo did not admit the attacks until 2016 and had to pay 50 million dollars to the injured users.

Tesco Bank

The hackers 2.26 million pounds (about 2.65 million euros) were stolen in 48 hours from the banking subsidiary from the British supermarket chain in 2016. Tesco Bank reported that it had detected "suspicious transactions" in about 40,000 bank accounts, from which money had been withdrawn from approximately half. The bank received a fine of 16.4 million pounds (19.2 million euros) for not properly protecting their customers.

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