1. 蠕虫：
蠕虫类似于病毒，但它不会修改程序。它越来越多地自我复制，导致计算机系统变慢。蠕虫可以通过远程控制。蠕虫的主要目标是吃系统资源。
2. 勒索软件：
勒索软件是一种恶意软件，旨在阻止用户访问自己的系统，直到向勒索软件创建者支付赎金为止。勒索软件比普通恶意软件危险得多，它通过带有受感染附件的网络钓鱼电子邮件进行传播。勒索软件在过去几年出现，可以攻击个人或组织。
蠕虫和勒索软件的区别：
| S.No. | WORMS | RANSOMWARE |
|---|---|---|
| 1. | A Worm is a form of malware that replicates itself and can spread to different computers via Network. | Ransomware is a form of malware designed to block access from system until a ransom fee is paid. |
| 2. | The main objective of worms to eat the system resources. | The main objective of ransomware is to take money by gaining access. |
| 3. | Worms can be detected and removed by the Antivirus and firewall. | Ransomware is more harmful among all the malware as the only way of removal is to pay a ransom to its creator. |
| 4. | It can give unauthorized access and control of the system to the hackers. | It provides profit to the ransomware programmers by getting money from user for unlocking the system. |
| 5. | It doesn’t need a host to replicate from one computer to another. | It require host is needed for spreading. |
| 6. | It is installed for malicious purposes. | It is installed for commercial purposes. |
| 7. | It is less harmful as compared. | It is more harmful. |
| 8. | Morris Worm, Storm Worm and SQL Slammer are some of the examples of worms. | Crypto, Wanna Cry, Cerber and locker are some of the examples of Ransomwares. |