Question 8 : Listen A computer virus attack is the computer version of the old concept of "wiretapping." 1) True 2) False . Question 9 : Listen Passwords should appear on the terminal screen when they are typed in. 1) True 2) False .Question 10 : Listen Versioning is a way of dealing with concurrent updates without using locks. 1) True 2) False

Question 8 : Listen A computer virus attack is the computer version of the old concept of "wiretapping." 1) True 2) False . Question 9 : Listen Passwords should appear on the terminal screen when they are typed in. 1) True 2) False .Question 10 : Listen Versioning is a way of dealing with concurrent updates without using locks. 1) True 2) False

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter14: System Administration

Section: Chapter Questions

Problem 8VE

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Consider the following scenario: you receive an email from your company's mail server alerting you that your password has been changed and that you must take action to confirm this. However, as far as you are aware, you have not changed the password. What gives? Why was the password changed, and what could have caused it to be changed? How did an attacker obtain the information they required to successfully reset the password? Was it a virus, and on what systems did it infect?
Consider the following example: Your company's mail server sends you an email informing you that your password has been changed and that you must take action to confirm this. However, to the best of your knowledge, you have not changed the password. What's going on? What caused the password to be changed, and why was it changed? How did an attacker acquire the necessary information to properly reset the password? Was it a virus, and what systems was it infecting?
A degrade attack is caused by a number of things.
In order to evaluate whether or not a pattern does in fact exist, this kind of virus scan checks for recognized patterns or signatures.
It is your obligation to verify the new password if the company's email server notifies you of a password change. There have been no apparent password changes thus far. A new passphrase has been implemented. Why? What malware may have given an attacker access to the data needed to alter the password, if any?
A virus that attaches itself to an executable executable. If it is required to modify the executable, what modifications should be made?
Explain the difference between a virus and a worm in the context of computer malware.
A computer virus has become attached to an executable file. A programme that is capable of being executed. In the event that modifications need to be made to the executable, what specific alterations should be implemented?
3: Define the type of security attack in each of the following cases: A student breaks into a professor’s office to obtain a copy of the next day’s test. A student gives a check for $10 to buy a used book. Later she finds that the check was cashed for $100. A student sends hundreds of e-mails per day to another student using a phony return e-mail address.
A virus that infects an executable file on a computer. What changes should be made to the executable if any?
Suppose that you are a computer virus writer; hence, you know that you need to store a copy of the code for your virus inside the virus itself. Moreover, suppose you know that a security administrator is also aware of this fact and will be using it to detect the presence of your virus in operating systems files. Explain how you can hide the embedded copy of your virus so that it is difficult for the security administrator to find it
What is the role of encryption in the operation of a virus?