1. WannaCry
The WannaCry attack made ransomware and malware known to everyone. Within four days, the spread of WannaCry paralyzed more than 200,000 computers in 150 countries. Occurring in several hospitals, WannaCry encrypts entire devices, including medical equipment. Even some factories were forced to stop production activities.
2. NotPetya/ExPetr
There is an opinion that the most damaging attack is not WannaCry, but another encrypting malware (technically an eraser but not changing the base) called ExPetr. This malware is known as NotPetya. The principle of operation is the same, using EternalBlue and EtrernalRomance exploiting worms moving on the Web. Despite being smaller in terms of the number of infected machines, Notpetya became a 'more expensive' malware epidemic as it targeted the business sector with an estimated loss of 10 billion dollars. While WannaCry, resulted in losses in the range of 4 to US $ 8 billion.
3. DarkHotel
It's no secret that public Wi-Fi networks in cafes or airports aren't the most secure. Many still believe that hotel Wi-Fi is still much more secure, because even if the hotel network is still public, at least authorization is required to access it. Such misunderstandings have cost many high-ranking and high-ranking employees of the company. When connected to hotel chains, they are prompted to install legitimate-looking updates to popular software. Furthermore, the device will be immediately infected with the DarkHotel spyware, which the attacker specifically puts into the network a few days before the user's arrival, and is removed a few days after. The hidden spyware logs keystrokes and allows cybercriminals to carry out targeted phishing attacks.
4. Stuxnet
This malware is perhaps best known for its complex and multifaceted attacks. Because this malware disabled uranium enrichment centrifuges in Iran, slowing down the country's nuclear program for several years. Stuxnet was the first to talk about the use of cyber weapons against industrial systems. At that time, no one could match Stuxnet for the complexity or shrewdness of being able to secretly spread the worm via USB devices. It even penetrates computers that are not connected to the Internet or a local network (LAN).
5. Mirai
The existence of Botnets has been monitored for a long time, but the emergence of the Internet of Things (IoT) gives new life to Botnets. Devices that were previously unsafe and had no antivirus installed suddenly started getting infected on a large scale. The device then tracks other devices of the same type and immediately spreads the infection. This zombie fleet is built on a piece of malware called Mirai (translated from Japanese as 'future'), which continues to grow in distribution pending instructions. Services such as PayPal, Twitter, Netflix, Spotify, PlayStation online service, and many others in the United States were affected. This phenomenon has finally awakened everyone's awareness of cybersecurity. The Mirai attack began with attacks on millions of small smart devices (such as webcams and washing machines) and eventually became known as 'The Fall of the Internet'.
The WannaCry attack made ransomware and malware known to everyone. Within four days, the spread of WannaCry paralyzed more than 200,000 computers in 150 countries. Occurring in several hospitals, WannaCry encrypts entire devices, including medical equipment. Even some factories were forced to stop production activities.
2. NotPetya/ExPetr
There is an opinion that the most damaging attack is not WannaCry, but another encrypting malware (technically an eraser but not changing the base) called ExPetr. This malware is known as NotPetya. The principle of operation is the same, using EternalBlue and EtrernalRomance exploiting worms moving on the Web. Despite being smaller in terms of the number of infected machines, Notpetya became a 'more expensive' malware epidemic as it targeted the business sector with an estimated loss of 10 billion dollars. While WannaCry, resulted in losses in the range of 4 to US $ 8 billion.
3. DarkHotel
It's no secret that public Wi-Fi networks in cafes or airports aren't the most secure. Many still believe that hotel Wi-Fi is still much more secure, because even if the hotel network is still public, at least authorization is required to access it. Such misunderstandings have cost many high-ranking and high-ranking employees of the company. When connected to hotel chains, they are prompted to install legitimate-looking updates to popular software. Furthermore, the device will be immediately infected with the DarkHotel spyware, which the attacker specifically puts into the network a few days before the user's arrival, and is removed a few days after. The hidden spyware logs keystrokes and allows cybercriminals to carry out targeted phishing attacks.
4. Stuxnet
This malware is perhaps best known for its complex and multifaceted attacks. Because this malware disabled uranium enrichment centrifuges in Iran, slowing down the country's nuclear program for several years. Stuxnet was the first to talk about the use of cyber weapons against industrial systems. At that time, no one could match Stuxnet for the complexity or shrewdness of being able to secretly spread the worm via USB devices. It even penetrates computers that are not connected to the Internet or a local network (LAN).
5. Mirai
The existence of Botnets has been monitored for a long time, but the emergence of the Internet of Things (IoT) gives new life to Botnets. Devices that were previously unsafe and had no antivirus installed suddenly started getting infected on a large scale. The device then tracks other devices of the same type and immediately spreads the infection. This zombie fleet is built on a piece of malware called Mirai (translated from Japanese as 'future'), which continues to grow in distribution pending instructions. Services such as PayPal, Twitter, Netflix, Spotify, PlayStation online service, and many others in the United States were affected. This phenomenon has finally awakened everyone's awareness of cybersecurity. The Mirai attack began with attacks on millions of small smart devices (such as webcams and washing machines) and eventually became known as 'The Fall of the Internet'.