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Ransomware is a type of malware that blocks access to files, encrypts data, and demands a payment in exchange for decryption. It is a rapidly evolving cyber threat, and the underlying social forces that are driving its growth remain understudied. Most analyses of ransomware rely on technical analysis of malware tool kits and individual criminal actors, which provide only a partial understanding of the problem.

In the beginning, hackers distributed ransomware via email attachments. They extorted small sums to unlock the victims’ files. As ransomware matured as a criminal enterprise, organized gangs entered the field, seeking out specific vulnerabilities in target networks. They used the dark Web to advertise their services, and improved ransomware software to avoid detection by antimalware scanners.

Some of the most popular ransomware variants, such as CryptoLocker and Ryuk, encrypt users’ files using either symmetric or asymmetric encryption, which makes it difficult for victims to recover their data without paying the ransom. In some cases, attackers demand payments in cryptocurrencies like Bitcoin to conceal their identities and evade law enforcement.

Organizations can protect themselves by implementing preventive measures, such as updating systems with the latest patches and regularly running cybersecurity assessments. Instilling a culture of cybersecurity awareness among staff, through training and regular phishing simulations, is also crucial. Additionally, effective backup and recovery is critical. Establishing a policy to back up data frequently, and ensuring that backups are stored securely, either offsite or in the cloud, can mitigate the impact of an attack. Also, having a well-tested incident response plan that addresses ransomware can help organizations minimize the financial impact of an attack.