Hidden Viruses

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Q: Veronica is an Ethical Hacker. Her newest assignment is website security testing before the company’s website is relaunched. In order to determine how viruses might affect the server, she places one on the system. With no alerts raised by the antiviruses, which were installed and running at the time, the virus infects the system. Which of the below could serve as explanations for this situation?

Answer is complete. Select more than one answer if applicable.

a. Veronica modified the unique hash/signature identifying the virus.

b. Veronica developed a completely new virus.

c. Veronica installed a virus that was not incorporated in the database of the antiviral program that was running on the server.

d. The virus has mutation engine, which has provided further encrypted code in addition to the current code of the virus.

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