Different Types of Computer Viruses - Download as PDF File (.pdf), Text File (.txt) or view presentation slides online. In more technical terms, a computer virus is a type of malicious code or program written to alter the way a computer operates and that is designed to spread from one. Computer Viruses are classified according to their nature of infection and behavior. Different types of computer virus classification are given below. • Boot Sector Virus: A Boot Sector Virus infects the first sector of the hard drive, where the Master Boot Record (MBR) is stored. The Master Boot Record (MBR) stores the disk's.

Macro Viruses These viruses infect the files created using some applications or programs that contain macros such as doc, pps, xls and mdb. They automatically infect the files with macros and also templates and documents that are contained in the file. They hide in documents shared through e-mail and networks. Macro viruses include: • Relax • bablas • Melissa.A • 097M/Y2K Memory Resident Viruses They usually fix themselves inside the computer memory.

They get activated every time the OS runs and end up infecting other opened files. They hide in RAM. Memory Resident Viruses Include: • CMJ • meve • randex • mrklunky Overwrite Viruses These types of viruses delete any information in a file they infect, leaving them partially or completely useless once they are infected. Once in the computer, they replaces all the file content but the file size doesn’t change. Overwrite Viruses Include: • Trj.Reboot • way • trivial.88.D Direct Action Viruses These viruses mainly replicate or take action once they are executed. When a certain condition is met, the viruses will act by infecting the files in the directory or the folder specified in the AUTOEXEC.BAT.

Sony Vegas Pro Keygen And Crack there. The viruses are generally found in the hard disk’s root directory, but they keep on changing location. Direct Action Viruses Include: • Vienna virus Directory Virus Also known as cluster virus or file system virus. They infect the computer’s directory by changing the path indicating file location. Free Download Hindi Movie Jaane Bhi Do Yaaro. They are usually located in the disk but affect the entire directory.

Directory Viruses Include: • dir-2 virus Web Scripting Virus Most web pages include some complex codes in order to create an interactive and interesting content. Such a code is often exploited to cause certain undesirable actions.

They mostly originate from the infected web pages or browsers. Web Scripting Viruses Include: • JS.Fortnight – a virus that spreads via malicious emails.

Multipartite Virus These type of viruses spread in many different ways. Their actions vary depending on the OS installed and presence of certain files. They tend to hide in the computer’s memory but do not infect the hard disk. Multipartite Viruses Include: • flip • invader • tequila FAT Viruses These lardy viruses attack the file allocation table (FAT) which is the disc part used to store every information about the available space, location of files, unusable space etc. FAT Viruses Include: • the link virus Companion Viruses These types of viruses infect files just like the direct action and the resident types. Once inside the computer, they ‘accompany’ other existing files.

Companion Viruses Include: • Asimov.1539 • stator and terrax.1069 Polymorphic Virus They encode or encrypt themselves in a different way every time they infect your computer. They use different encryption and algorithms. This makes it difficult for the antivirus software to locate them using signature or string searches (since they are very different in each encryption). Polymorphic Viruses Include: • Marburg • tuareg • Satan bug • elkern Worm This program is very similar to a virus and has the ability to self-replicate leading to negative effects on your computer. Worm Viruses Include: • lovgate.F • sobig.D • trile.