Write down any three differences between boot sector virus and stealth virus.
Answers
Answer:
Stealth Virus : It is a very tricky virus as it changes the code that can be used to detect it. Hence, the detection of virus becomes very difficult. For example, it can change the read system call such that whenever user asks to read a code modified by virus, the original form of code is shown rather than infected code.
Boot sector Virus : It infects the boot sector of the system, executing every time system is booted and before operating system is loaded. It infects other bootable media like floppy disks. These are also known as memory virus as they do not infect file system
Explanation:
This type of viruses has ability to hide in boot sector. The viruses will load into memory when there is booting system and trying to read from hard disk. Boot sector viruses are more spread since old time when floppy disk was popular. But now we hardly seen them since many of them only can spread through floppy disk. These are Boot viruses.
Stealth Viruses is some sort of viruses which try to trick anti-virus software by intercepting its requests to the operating system. It has ability to hide itself from some antivirus software programs. Therefore, some antivirus program cannot detect them.