Latest Ransomware Attacks and What We Can Learn From Them | Key Insights for Cybersecurity

Key takeaways

• Most ransomware begins with phishing, exposed remote access or unpatched software.
• Offline, tested backups are the difference between recovering and paying.
• Segmenting the network slows lateral movement and limits encryption.

Table of Contents

• What is Ransomware?
• Recent Ransomware Attacks
• How Do Ransomware Attacks Work?
• Key Trends in Ransomware Attacks
• Lessons We Can Learn From Recent Ransomware Attacks
• Conclusion

Ransomware attacks have become one of the biggest cybersecurity threats in recent years. These attacks disrupt businesses and cause severe financial and reputational damage. As cybercriminals continue to evolve their tactics, understanding the latest trends in ransomware attacks helps organizations safeguard their data and systems. Here are the most recent ransomware incidents and the lessons we can learn from them.

What is Ransomware?

Ransomware is a type of malicious software (malware) designed to block access to a computer system or its data until a ransom is paid. Typically, cybercriminals demand payment in cryptocurrency, making it harder to trace the transactions. The attack usually begins with a phishing email or exploiting vulnerabilities in unpatched systems.

Recent Ransomware Attacks

In the last year, several high-profile ransomware attacks have made headlines, and the threats keep changing.

The Colonial Pipeline Attack (May 2021)

One of the most impactful ransomware attacks in recent memory, the Colonial Pipeline attack led to a widespread fuel shortage across the United States. The hackers, identified as part of the DarkSide group, demanded a ransom and managed to lock down critical infrastructure.

Lesson: The attack shows the importance of securing critical infrastructure and having a solid incident response plan in place.

The JBS Foods Attack (June 2021)

JBS Foods, one of the world’s largest meat suppliers, was attacked by the REvil ransomware group. The company paid an $11 million ransom to regain access to its systems. The attack disrupted operations across North America and Australia.

Lesson: Companies must regularly back up their data and ensure these backups are isolated from the network to prevent ransomware from encrypting them.

The Kaseya VSA Attack (July 2021)

The REvil ransomware group exploited a vulnerability in Kaseya VSA, a remote monitoring and management tool used by managed service providers (MSPs). The attack affected over 1,500 businesses worldwide, making it one of the largest ransomware attacks to date.

Lesson: Regular patching of software and systems is vital, especially for third-party tools that have access to a large number of client systems.

The Accellion Data Breach (2021)

A zero-day vulnerability in Accellion's File Transfer Appliance (FTA) software was exploited by cybercriminals to deliver ransomware. The breach exposed sensitive data from various organizations, including healthcare providers and universities.

Lesson: Organizations should perform regular vulnerability assessments and prioritize patching vulnerabilities in third-party software.

How Do Ransomware Attacks Work?

While the methods vary, the general steps of a ransomware attack include:

Infiltration

The ransomware typically enters the system via phishing emails, malicious websites, or exploiting software vulnerabilities.

Encryption

Once the ransomware gains access, it encrypts files or systems, making them inaccessible to the victim.

Ransom Demand

The attackers demand a ransom, often in cryptocurrency, in exchange for decryption keys or to prevent the leak of stolen data.

Payment

In some cases, victims pay the ransom, but there's no guarantee that the attackers will provide the decryption key or that they won't strike again.

Key Trends in Ransomware Attacks

Double Extortion

This strategy involves exfiltrating the victim's data as well as encrypting it. Attackers then threaten to release the stolen data if the ransom isn’t paid.

Ransomware-as-a-Service

Ransomware groups are now offering Ransomware-as-a-Service (RaaS), allowing other cybercriminals to use their ransomware tools for a share of the profit. This trend has made ransomware attacks more accessible to a broader range of criminals.

Targeting Critical Infrastructure

Hackers are increasingly targeting critical infrastructure, such as healthcare systems, energy providers, and government agencies. These industries are highly vulnerable, and the impact of an attack can be devastating.

Lessons We Can Learn From Recent Ransomware Attacks

Regular Backups Are Critical

One of the most effective ways to mitigate the damage of a ransomware attack is to have regular data backups. However, it’s important to ensure that these backups are isolated from the primary network to avoid them being encrypted during the attack.

Patch Systems and Software Promptly

Timely patching of vulnerabilities in systems and software stops cybercriminals exploiting known weaknesses. Regular vulnerability assessments should be part of an organization’s routine security practices.

Improve Employee Awareness and Training

Since phishing attacks are one of the most common ways ransomware enters a system, providing training to employees on how to recognize phishing attempts can significantly reduce the risk of an attack.

Have an Incident Response Plan

A well-documented incident response plan is essential. This plan should include steps for isolating affected systems, communicating with stakeholders, and working with law enforcement if necessary.

Conclusion

The threat of ransomware continues to grow, but understanding the latest attacks and adapting to the changing tactics of cybercriminals can help organizations defend against these threats. By focusing on backups, regular patching, employee training, and having a full incident response plan, businesses can reduce the risk and impact of ransomware attacks.

Organizations that learn from these recent attacks will be better prepared for the next ones.

To take this further with guided labs and an instructor, see our hands-on incident response labs.

Related reading

• What is Ransomware-as-a-Service (RaaS) and how is ransomware evolving with AI in 2026?
• Ransomware Revealed | A Step-by-Step Breakdown of How Attacks Happen
• Unmasking Akira: The Global Impact of 2026’s Rising Cyber Threat

Reference

For the authoritative details, see CERT-In (India).