There are many types of viruses that use many types of methods to break through your computers firewall and antivirus and then they steal your personal data,password,Bank info, and everythig that they can make a profit off of.
Embeds itself in the computer's memory (RAM), allowing it to infect files and programs even after the original infection source is deleted.
Targets the Master Boot Record (MBR) of hard drives, loading into memory when the computer boots to infect other files and make removal difficult.
Changes its signature (file name, encryption key, or code) each time it replicates to evade detection by signature-based antivirus software.
Uses the macro language of applications like Microsoft Word or Excel to infect documents. They run automatically when the file is opened and spread to other documents.
Spreads by acting on multiple parts of a system simultaneously, typically infecting both the boot sector and executable files, making it highly contagious.
Attaches itself to executable files (.exe, .com) and infects, damages, or deletes files when the program is run.
A rare type that hides itself in the empty space of files without damaging the file's content or changing its size, making it very hard to detect.
