Ransomware is a type of malicious software (malware) that seeks to deny access to a computer system or its data to any legitimate users. It typically does this by encrypting data (making it unreadable) and then demanding a ransom payment in exchange for the decryption key. The attack can be targeted at an individual user or an entire network, and in some cases, the ransom demand is made in the form of a demand for cryptocurrency.

Ransomware is highly effective at extorting money from victims, as it is often impossible for victims to recover their data without paying the ransom. It is also relatively easy to deploy, requiring minimal technical skill and often targeting computers that are already infected with other malware or vulnerable to attack. Ransomware is typically spread through malicious attachments in emails or malicious links in online ads, as well as through software downloads and other forms of social engineering.

Ransomware is a growing threat, and is becoming increasingly sophisticated. As security measures are developed to protect against ransomware, attackers are developing new techniques and strategies to evade detection and make their attacks more effective. Because of this, ransomware is an ever-evolving threat and organizations should remain vigilant in their security practices in order to protect their systems and data.