GSLC · Question #17
Which of the following is a virus that can redirect the disk head to read another sector instead of the one in which it resides?
The correct answer is C. Stealth virus. A stealth virus actively hides itself by intercepting disk read requests and redirecting the disk head to a clean sector, making detection difficult.
Question
Which of the following is a virus that can redirect the disk head to read another sector instead of the one in which it resides?
Options
- AMultipartite virus
- BMacro virus
- CStealth virus
- DBoot sector virus
How the community answered
(38 responses)- A8% (3)
- B3% (1)
- C87% (33)
- D3% (1)
Why each option
A stealth virus actively hides itself by intercepting disk read requests and redirecting the disk head to a clean sector, making detection difficult.
A multipartite virus infects both the boot sector and executable files simultaneously, but does not redirect disk head reads to hide itself.
A macro virus embeds malicious macros in document files such as Word or Excel and executes when the document is opened, not via disk sector redirection.
A stealth virus uses interception techniques to redirect disk head reads away from the infected sector, returning the contents of a clean sector instead. This allows the virus to remain resident in memory and actively conceal its presence from antivirus tools and the OS. The redirection mechanism is the defining characteristic that distinguishes stealth viruses from other types.
A boot sector virus infects the master boot record or volume boot record and loads before the OS, but does not use disk head redirection as a concealment method.
Concept tested: Stealth virus disk sector redirection technique
Source: https://www.comptia.org/content/guides/what-is-a-computer-virus
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