WannaCry Ransomware: What you need to know?

Contents 

What Is the WannaCry Ransomware?

How Does WannaCry Ransomware Work?

What Damage Did WannaCry Ransomware Cause?

How to Prevent WannaCry Ransomware Attacks?

Conclusion

What Is the WannaCry Ransomware?

WannaCry ransomware is a type of malicious software that infects computers running the Microsoft Windows operating system through a vulnerability known as EternalBlue. It encrypts files on the computer and demands a Bitcoin ransom payment for decryption. WannaCry ransomware rapidly spread worldwide, starting on May 12, 2017, affecting over 150,000 computers in more than 150 countries.

How Does WannaCry Ransomware Work?

WannaCry exploits a vulnerability in the Windows operating system's Server Message Block (SMB) protocol, known as EternalBlue. The SMB protocol is used for communication between different nodes on a network, and EternalBlue is an attack method that leverages unpatched flaws within this protocol to send specially crafted packets to target computers, allowing for the execution of arbitrary code. It is believed that this vulnerability was initially discovered and developed into the EternalBlue exploit by the United States National Security Agency (NSA) but was later stolen and leaked to the public by a group called The Shadow Brokers.

Once WannaCry infects a computer, it attempts to access a hardcoded web address, which serves as a kill switch. If it can connect to this address, it stops running. If not, it continues to search for and encrypt various types of important files on the computer, such as Microsoft Office documents, MP3 files, MKV files, etc. It then displays a ransom notice on the screen, demanding a ransom payment of $300 to $600 in Bitcoin for file decryption.

What Damage Did WannaCry Ransomware Cause?

WannaCry ransomware had a significant impact and caused substantial losses across various sectors globally. The most notable case was the United Kingdom's National Health Service (NHS), where more than a quarter of hospitals and clinics were affected by WannaCry, resulting in thousands of computers being locked and healthcare services disrupted. Other affected organizations and institutions included Deutsche Bahn (Germany's railway company), Telefonica (Spain's telecommunications company), the Russian Interior Ministry, and more. It is estimated that WannaCry caused economic losses ranging from $4 billion to $8 billion worldwide.

How to Prevent WannaCry Ransomware Attacks?

Preventing WannaCry ransomware attacks involves several measures:

① Promptly Apply Windows Patch Updates

Microsoft released a patch for the EternalBlue vulnerability in March 2017 and later issued emergency patches for older Windows systems (e.g., XP and Vista) after the WannaCry outbreak. Users should install these patches as soon as possible to close potential entry points for attackers.

② Use Reliable Antivirus Software and Firewalls

Choose reputable antivirus software with frequent updates and keep it up to date to detect and remove potential malware promptly. Additionally, enable firewalls to block unnecessary network connections.

③ Backup Important Data and Files

Regularly back up your data and files to external storage devices or cloud services to prevent data loss in case of a ransomware attack. With proper backups, you won't need to pay ransoms to attackers or worry about losing data.

④ Use MetroVPN When Connecting to Public Wi-Fi

MetroVPN is a professional VPN service that provides secure, fast, and stable internet connections. It allows users to hide their real IP addresses and locations, protecting them from online monitoring and tracking. MetroVPN also encrypts users' internet traffic, preventing third parties from intercepting or tampering with it. Using MetroVPN when connecting to public Wi-Fi ensures a safer browsing experience and safeguards online privacy.

Conclusion

WannaCry ransomware was a severe global cyberattack that exploited a vulnerability in the Windows operating system, encrypting files and demanding ransom payments. It had a profound impact on various sectors worldwide. To prevent WannaCry ransomware attacks, users should apply Windows patch updates promptly, use reliable antivirus software and firewalls, back up important data, and consider using MetroVPN to protect their online privacy.