1. 恐吓软件：
恐吓软件是一种恶意软件，它伪装成合法的计算机安全软件，并声称可以检测受影响计算机上实际上并不存在的各种威胁。然后，用户会被告知他们必须购买恐吓软件才能修复他们的计算机，并且会收到咄咄逼人的弹出通知，直到他们提供信用卡号并为毫无价值的恐吓软件产品支付所需的金额。
2. 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。
恐吓软件和蠕虫的区别：
| S.No. | Scareware | Worms |
|---|---|---|
| 1. | Scareware is a tool to help fix your system but when the software is executed it will infect your system or completely destroy it. | A Worm is a form of malware that replicates itself and can spread to different computers via Network. |
| 2. | It is less harmful as compared. | It is more harmful. |
| 3. | Scareware can be detected in browser by pop up notification and removed by the Antivirus and firewall. | Worms can be detected and removed by the Antivirus and firewall. |
| 4. | It give unauthorized access and control of the system to the hackers. | It also give unauthorized access and control of the system to the hackers. |
| 5. | Scareware is one of the type of malware. | Worms is one of the type of malware. |
| 6. | It displays windows- style popups. | It displays a software. |
| 7. | In this, user should immediately close the browser. | In this, user should restore the PC to gain access. |
| 8. | DriveCleaner, WinAntivirus, ErrorSafe, WinFixer and XP Antivirus are some of the examples of scareware. | Morris Worm, Storm Worm and SQL Slammer are some of the examples of worms. |