How Computer Viruses Attack ?
Computer Viruses have ways of making sure that they run before they can infect, as that is the basic requirement for virus code. They can attach themselves to other programs or hide in code that is run automatically when you open certain types of files. You might receive an infected file on a disk, in an email attachment, or in a download from the internet. As soon as you launch the file, the virus code runs. Then the virus can copy itself to other files or disks and make changes on your computer.
Simple precautions, some of which costs nothing that can prevent such risks. Also, you should know about the different types of Computer Viruses. Today we will talk about the Overwrite Virus.
Overwrite virus also known as Cavity virus look for program files with large amounts of free space, and if large enough, store themselves there. This type of virus overwrites files with their own copy. Of course, this is a very primitive technique, but it is certainly the easiest approach of all. Overwriting viruses cannot be disinfected from a system. Infected files must be deleted from the disk.
Overwrite viruses typically have low visibility and are spread via email, making them hard to identify for an average PC user. They enjoyed a heyday in the early 2000s with Windows 2000 and Windows NT, but you can still find them in the wild.
Example-Way, Trj.Reboot, Trivial.88.D.
Considering their destructive nature, overwriting viruses have been identified as the most dangerous of them all. They have been known to exploit a wide range of operating systems including Linux, Macintosh, Windows, and DOS platforms. Once a victim file has been infected, it is then overwritten with malicious code from the virus. If a user does not spot the infection in time, an overwriting virus can inflict irreversible damage to numerous files. A system that has been compromised by this type of infection can easily become unstable and eventually inoperable. Files that have been corrupted by the overwriting virus cannot be disinfected. Instead, they must be completely deleted and restored from a backup source.
How To Remove Overwrite Virus ?
1. The only way to clean a file infected by an overwrite virus is to delete the file completely, thus losing the original content.
2. Viruses are best removed on the spot before they can do any real damage. Ensure that you’re running the latest version of your antivirus software so that any existing threats can be taken care of right away.