How big is the biggest cyberattack in the history of the Internet?

Up until 2017, the world’s population is estimated to be 7.5 billions (the World Bank). Approximately 55% of those have access to the Internet. Meanwhile, the 2013 cyberattack on Yahoo leaked an unbelievable 3 billion account information. The information that we compiled into the following infographic will introduce you to other staggering figures regarding the scale of some of the biggest cyberattacks.

There have been extremely dangerous and large-scale cyberattacks in Vietnam

It’s time we – consumers and businesses alike – joined force to raise people’s awareness of cyber security in Vietnam.

(Text outline can be found below)

Top 8 biggest cyberattacks in Vietnam and the world cystack

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Top 8 biggest cyberattacks in Vietnam and the world – CyStack

I. Global

4. Equifax

  • Date: July 29 2017
  • Impact: Highly sensitive personal information of 147.9 million consumers including 209,000 exposed credit card numbers
  • One of the biggest credit bureaus in the U.S., Equifax, had a security breach involving the information of 147.9 million consumers due to a vulnerability in one of their website. 143 million social security numbers, dates of birth and addresses, a number of drivers’ license numbers and 209,000 credit card numbers were stolen.

3. eBay

  • Date: May 2014
  • Impact: 145 million accounts
  • The hackers involved in this cyberattack on eBay invaded the e-commerce giant’s system through 3 employees’ accounts and had internal access for 229 days. All 145 million user accounts were compromised and their names, addresses, dates of birth and encrypted passwords were stolen. Although payment information was separately stored and was not compromised, eBay still faced criticism for not properly informing its users.

2. Adult Friend Finder

  • Date: October 2016
  • Impact: More than 412.2 million accounts
  • The FriendFinder Network, with casual hookup and adult content websites like Adult Friend Finder, suffered a data leak around October 2016. 20 years worth of data was lost in this cyberattack, including names, email addresses and passwords. Due to weak encryption, these passwords are mostly decrypted by the time the article analyzing the leaked data was published on

1. Yahoo

  • Date: 2013 – 2014
  • Impact: 3 billion user accounts
  • In September 2016, during the time when Yahoo was negotiating its price in the attempt to be acquired by Verizon, Yahoo publicized the greatest data breach in the history. Occuring in 2014, this involved 500 million affected accounts. A short time later, Yahoo updated this information with another cyberattack in 2013 that involved a staggering 1 billion accounts involved. The data compromised included not only names, dates of birth, email address and passwords (using an older encryption method) but also security questions and answers. That was not the final number – in October 2017, Yahoo claimed the total number of affected accounts is 3 billion.

II. In Vietnam

4. VCCorp

  • Date: October 2014
  • Impact: Many big websites belonging to VCCorp including Kenh14, Gamek, Genk, CafeF and those operated by VCCorp including Dan Tri, Soha, Nguoi Lao Dong,… were unavailable
  • Between October 17 and 18, websites belonging to VCCorp, a large tech firm in Vietnam, and their partner websites suffered continuous downtime and some were redirected to a blog containing negative information about internal issues of this company. Two very popular news website, Dantri and VnEconomy were repeatedly unavailable for long periods. Website showed signs of being deleted by the hacker. This cost VCCorp tens of billion VND and is the biggest disaster in the history of this company.

3. Bkav

  • Date: February 2012
  • Impact: Website defacement, exposure of approximately 100,000 email addresses and forum passwords
  • On February 13, 2012, a team of hackers claiming to be “Anonymous/LulzSec Viet Nam” attacked Bkav forum and publicized over 100,000 email addresses and the entire forum database. On February 24, the hackers publicized 8 critical vulnerabilities in the company’s web server in a blog post. However, Bkav later claimed that this information was inaccurate and they had already identified the attacker.

2. VNG

  • Date: 2015
  • Impact: personal information of 160 million users
  • On April 26, 2018, a database containing over 163 million accounts of VNG users were found to be on sale on a forum. VNG confirmed these are the results of an attack in 2015 but were not publicized. The leaked data include passwords, login credentials, emails, phone numbers, names, dates of birth, addresses, IP addresses,… The encryption used for the passwords were considered weak by the security community and can be hacked easily by the attackers.

1. Vietnam Airlines

  • Date: July 2016
  • Impact: personal information of 160 million users
  • July 29, 2016, several screens showing flight information of Tan Son Nhat, Noi Bai, Da Nang International Airports and Phu Quoc Airport was compromised to show contents defacing Vietnam and the Phillippines, along with incorrect information about the East Sea of Vietnam. Vietnam Airlines’ website was redirected to another website to show the leaked data of 411,000 Golden Lotus members – mainly high-profile figures of governments, banks and large firms. The exposed data included names, dates of birth, permanent addresses, organizations, phone numbers, nationalities, member points, etc. Over 100 flights were affected.