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Welcome to the Reversing Malware MCQs Page

Dive deep into the fascinating world of Reversing Malware with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Reversing Malware, a crucial aspect of Reverse Engineering. In this section, you will encounter a diverse range of MCQs that cover various aspects of Reversing Malware, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Reverse Engineering.

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Check out the MCQs below to embark on an enriching journey through Reversing Malware. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Reverse Engineering.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Reversing Malware. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Reversing Malware MCQs | Page 9 of 10

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Q81.
Why does the Backdoor program use UPX?

a.

To encrypt the program and fend off debuggers and disassemblers

b.

To decrease the binary file size

c.

To keep the file size as large as possible

d.

To pack multiple executables into a single file

Discuss
Answer: (b).To decrease the binary file size Explanation:The Backdoor program uses UPX to decrease the binary file size, as it is a compression tool designed for this purpose.
Q82.
How can the problem of reversing the program in its compressed form be avoided?

a.

By permanently decompressing it with UPX

b.

By encrypting it with a packer designed as an antireversing tool

c.

By running it on a different operating system

d.

By ignoring the compression and attempting to reverse it directly

Discuss
Answer: (a).By permanently decompressing it with UPX Explanation:The problem of reversing the program in its compressed form can be avoided by permanently decompressing it with UPX.
Q83.
What should be done after permanently decompressing the Backdoor program with UPX?

a.

Rerun DUMPBIN to get a better result

b.

Ignore the program and move on to another task

c.

Attempt to reverse it directly

d.

Decrypt it with a different packer

Discuss
Answer: (a).Rerun DUMPBIN to get a better result Explanation:After permanently decompressing the Backdoor program with UPX, it is wise to rerun DUMPBIN to get a better result.
Q84.
Why is reversing the Backdoor program in its decompressed form a more straightforward task?

a.

Because it is encrypted with a packer designed as an antireversing tool

b.

Because it is smaller in size

c.

Because all the functions used by the program can be seen

d.

Because it is designed to be easy to reverse

Discuss
Answer: (c).Because all the functions used by the program can be seen Explanation:Reversing the Backdoor program in its decompressed form is a more straightforward task because all the functions used by the program can be seen.
Q85.
Is it always possible to automatically unpack a program?

a.

Yes

b.

No

c.

May be Yes or No

d.

Can't say

Discuss
Answer: (b).No Explanation:In some cases, it is not going to be possible to automatically unpack a program.
Q86.
What precaution should be taken before running the Backdoor program?

a.

It should be run on a system with valuable data or programs

b.

It should be run on a system that is not isolated

c.

It should be run in an uncontrolled environment

d.

It should be run on an isolated system that doesn't contain any valuable data or programs

Discuss
Answer: (d).It should be run on an isolated system that doesn't contain any valuable data or programs Explanation:Before running the Backdoor program, a precaution should be taken by running it on an isolated system that doesn't contain any valuable data or programs, and in a controlled environment.
Q87.
What is the Backdoor packed with?

a.

UPX

b.

RAR

c.

7-Zip

d.

None of the above

Discuss
Answer: (a).UPX Explanation:The Backdoor is packed with UPX.
Q88.
Why is it slightly annoying to reverse the program in its compressed form?

a.

It is difficult to understand the compressed code.

b.

The compressed file is not functional.

c.

It requires a special tool to decompress the file.

d.

All of the above.

Discuss
Answer: (c).It requires a special tool to decompress the file. Explanation:It is slightly annoying to reverse the program in its compressed form because it requires a special tool to decompress the file.
Q89.
How can you permanently decompress the program?

a.

By running UPX with the -c switch.

b.

By running UPX with the -d switch.

c.

By running UPX with the -p switch.

d.

By running UPX with the -u switch.

Discuss
Answer: (b).By running UPX with the -d switch. Explanation:You can permanently decompress the program by running UPX with the -d switch.
Q90.
What is the most important code area in communicating with the backdoor?

a.

The code that processes public-message packets

b.

The code that processes private-message packets

c.

The code that processes server messages

d.

The code that processes user input

Discuss
Answer: (b).The code that processes private-message packets Explanation:The most important code area in communicating with the backdoor is the one that processes private-message packets because that's how the attacker controls the program.
Page 9 of 10

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