| Definition | A specific type of malicious software that self-replicates by infecting other files or systems | A broader term that encompasses various types of malicious software |
| Replication | Can replicate itself and spread to other files or systems | Can include self-replicating viruses, but also includes other types of malicious software such as worms, Trojans, adware, spyware, ransomware, etc. |
| Dependency | Requires a host file or program to spread and infect | Can be self-contained or depend on other files or systems for execution or spread |
| Intent | Designed to cause damage, disrupt operations, or gain unauthorized access | Designed for a variety of purposes including damage, theft, surveillance, or unauthorized access |
| Infection Method | Often spread through infected email attachments, malicious downloads, or compromised websites | Can be spread through various channels including email, websites, social engineering, removable media, etc. |
| Visibility | Can be easily detectable and identifiable as a specific type of virus | Can be difficult to detect and may require specialized tools or techniques for identification |
| Malicious Actions | Can delete, modify, or corrupt files, slow down the system, or spread to other systems | Can include a range of actions such as stealing data, displaying unwanted ads, tracking user activities, encrypting files for ransom, etc. |
| Signature Detection | Can be detected by signature-based antivirus software | Detection can be based on known signatures, heuristics, or behavior-based analysis |
| Prevention and Removal | Can be prevented and removed using antivirus software and regular system updates | Requires the use of antivirus and antimalware software, regular updates, and safe browsing practices |
| Examples | Examples include the Melissa virus, ILOVEYOU virus, etc. | Examples include worms like Conficker, Trojans like Zeus, ransomware like WannaCry, etc. |
