- #WHAT IS A WORM VIRUS AND HOW DOES IT WORK SOFTWARE#
- #WHAT IS A WORM VIRUS AND HOW DOES IT WORK CODE#
Trojan horses masquerade as a legitimate application. Worms consumes system resources to slow it down. Once a system is infected with a worm, the worm uses the vulnerabilities of the system to replicate itself and to spread other systems. They do not need a host application to attach themselves. Worms are self-executable codes or scripts. The virus developer can hide macro viruses in Microsoft document files or Microsoft spreadsheets Worms For example, Microsoft office supports macros.
#WHAT IS A WORM VIRUS AND HOW DOES IT WORK CODE#
When the user opens the attachment, the macro code executes. The virus developer hides the macro virus in a file that the target application supports and sends the file as an email attachment to the user. These viruses target applications that support or use scripting languages. An antivirus program can't detect it until the program knows the specific evolution algorithm. Since a polymorphic virus changes each time when it is executed, it is the hardest virus to detect. These viruses modify themselves as they reproduce. When the virus executes, it reproduces itself and damages the system in the way the virus developer intended. When a user executes an executable that contains a virus, the virus executes with the file as well. They hide themselves in executable files such as. This means the virus will replicate every time the machine boots. If a virus hides in the boot sector of the hard disk containing the operating system, the virus is executed when the operating system boots. Operating systems use the boot sector in the booting process. These viruses infect the boot sector of the hard disk. The most common types of viruses are the following. Viruses can be categorized by where they reside and by how they work. In addition to self-replication, viruses can also include instructions to perform malicious tasks such as damaging system files, corrupting user data files, causing applications to behave unexpectedly. Since the virus is self-replicating, it will make a copy of itself every time the application is invoked. Virus invokes whenever the application is invoked. When a user downloads and installs that application, the virus is also secretly installed on the user's computer.
#WHAT IS A WORM VIRUS AND HOW DOES IT WORK SOFTWARE#
The developer attaches the virus to a legitimate application or software and shares the application on the Internet. The developer designs the virus in such a way that it can secretly attach to other programs. VirusesĪ virus is a small executable and self-replicating computer program. These classes are viruses, worms, spyware, and Trojan horses.
In the following section, we will discuss four classes of malware. A malware is classified based on the way it works. Generally, malicious programs are created to corrupt data, crash applications, harass users, and perform many other malicious actions. A malware is any form of malicious code that is designed to perform a malicious task.