5 CYBERATTACKS IN THE LAST DECADE

From 2016 to 2025, several major cyberattacks have affected governments, businesses, healthcare, and critical infrastructure worldwide. Below are five notable cyberattacks, with an outline and discussion of their causes, targets, and impacts.

1. WannaCry ransomware attack (2017):

The WannaCry ransomware attack was one of the most widespread cyberattacks in history. It infected more than 200,000 computers across 150 countries.

How the Attack Worked
It exploited a vulnerability in Microsoft Windows called EternalBlue. Once a system was infected, the ransomware encrypted files and demanded payment in Bitcoin to restore access.

Major Targets
Hospitals in the United Kingdom’s National Health Service (NHS)
Government agencies
Telecommunications and transportation companies

Impact
Thousands of medical appointments were cancelled.
Businesses and organizations suffered billions of dollars in damages.
It highlighted the importance of regular software updates and patch management.

2. SolarWinds supply chain attack (2020):

The SolarWinds attack was a sophisticated supply-chain cyberattack targeting government agencies and large corporations.

How the Attack Worked
Hackers inserted malicious code into updates of the SolarWinds Orion IT management software. When organizations installed the update, they unknowingly installed malware.

Major Targets
U.S. federal agencies
Technology companies
Security firms

Impact
Hackers secretly monitored networks for months.
Considered one of the largest cyber-espionage operations in history.
It exposed weaknesses in software supply chain security.

3. Colonial Pipeline ransomware attack (2021):

This ransomware attack targeted Colonial Pipeline, the largest fuel pipeline operator in the United States.

How the Attack Worked
The attackers used ransomware from the DarkSide group. They encrypted company systems, forcing the company to shut down pipeline operations temporarily.

Impact
Fuel shortages occurred across parts of the United States.
Panic buying and economic disruptions followed.
The company paid about $4.4 million ransom to regain system access.

Significance: The attack demonstrated that critical infrastructure like energy systems can be severely affected by cybercrime.

4. Kaseya VSA ransomware attack (2021):

This attack targeted the Kaseya VSA remote management software, used by IT service providers.

How the Attack Worked
Hackers exploited a vulnerability in the software. Through managed service providers, ransomware spread to hundreds of companies simultaneously.

Impact
Between 800 and 1,500 businesses were affected globally.
Some companies had to shut down operations temporarily.
The attackers demanded $70 million ransom for a universal decryptor.

Significance: This attack showed the danger of supply-chain vulnerabilities, where a single compromised software system can infect thousands of organizations.

5. Kyivstar cyberattack (2023):

This cyberattack targeted Kyivstar, Ukraine’s largest telecommunications provider.

How the Attack Worked
Hackers infiltrated and destroyed parts of the company’s IT infrastructure. The attack disrupted mobile and internet services nationwide.

Impact
Millions of users lost access to telecom services.
Critical services like air-raid alert systems were affected.
Recovery costs were estimated at about $90 million.

Significance: The attack highlighted how cyber warfare is increasingly used during geopolitical conflicts.

Conclusion
Over the last decade, cyberattacks have become more frequent, complex, and destructive. The examples above show different forms of attacks, including: Ransomware attacks (WannaCry, Colonial Pipeline), Supply chain attacks (SolarWinds, Kaseya), Cyber warfare attacks (Kyivstar), etc.

These incidents demonstrate the urgent need for stronger cybersecurity policies, system updates, employee training, and international cooperation to protect digital infrastructure.