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.

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 7 of 10

Explore more Topics under Reverse Engineering

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Introduction to Reverse Engineering

02

Low Level Software 🔒

03

Windows Fundamentals 🔒

04

Reversing Tools 🔒

05

Beyond the Documentation

06

Deciphering File Formats

07

Auditing Program Binaries 🔒

08

Piracy and Copy Protection

09

Antireversing Techniques 🔒

10

Breaking Protections 🔒

11

Reversing .NET 🔒

12

Decompilation

13

Deciphering Code Structures 🔒

14

Understanding Compiled Arithmetic

15

Deciphering Program Data 🔒

Q61.

What is the potential weakness of the decryption code in a polymorphic program?

It could theoretically be used as the signature

It is encrypted using a random key

It is not required to run the program

It is dynamic

Discuss

Answer: (a).It could theoretically be used as the signature Explanation:Even if the program code is encrypted using a random key to prevent signature-based identification, the decryption code that is required to run the program could be used as a signature for the antivirus program to identify the program as malware. This weakness can be exploited by malware developers who may use different encryption keys for each instance of the malware, but use the same decryption code, allowing antivirus programs to identify the malware based on the decryption code.

Q62.

What is required before entering a function that can be polymorphed?

Saving and restoring all registers

Removing all instructions

Adding new instructions

None of the above

Discuss

Answer: (a).Saving and restoring all registers Explanation:All registers must be saved and restored before entering a function that can be polymorphed in this fashion.

Q63.

What is metamorphism in the context of malware?

Altering the entire program each time it is replicated to make it look different

Making slight alterations in the decryption engine to encrypt the program's body

The process of analyzing malware code and extracting high-level information

The process of creating a unique signature for each version of a malware

Discuss

Answer: (a).Altering the entire program each time it is replicated to make it look different Explanation:Metamorphism involves altering the entire program each time it is replicated to make it look different from any other versions. This makes it very difficult for antivirus writers to use any kind of signature-matching techniques for identifying the malicious program.

Q64.

What is the benefit of using metamorphism in malware?

It makes the program run faster

It encrypts the program's body and makes slight alterations in the decryption engine

It makes each version of the malware look radically different from any other versions

It makes the program more easily identifiable by antivirus programs

Discuss

Answer: (c).It makes each version of the malware look radically different from any other versions Explanation:The benefit of metamorphism (from a malware writer’s perspective) is that each version of the malware can look radically different from any other versions. This makes it very difficult (if not impossible) for antivirus writers to use any kind of signature-matching techniques for identifying the malicious program.

Q65.

What is required for a metamorphic engine to work?

An analysis of the malware's code

A powerful code analysis engine embedded into the malicious program

A list of predefined bytes that can be altered in the code

Hard-coded information regarding the specific code bytes that can be altered

Discuss

Answer: (b).A powerful code analysis engine embedded into the malicious program Explanation:Metamorphism requires a powerful code analysis engine that actually needs to be embedded into the malicious program. This engine scans the program code and regenerates a different version of it on the fly every time the program is duplicated.

Q66.

What kind of alterations can be automatically applied to a program by a metamorphic engine?

Alterations to the decryption engine only

Alterations to certain registers in the program

Alterations to the entire program, including the metamorphic engine itself

Alterations to certain high-level information extracted from the program

Discuss

Answer: (c).Alterations to the entire program, including the metamorphic engine itself Explanation:A metamorphic engine can perform a wide variety of alterations on the malicious program (needless to say, the alterations are performed on the entire malicious program, including the metamorphic engine itself).

Q67.

What is a metamorphic engine?

An antivirus program

A program that randomizes parameters of a code

A program that scans for malicious code

A program that alters the function of an operating system

Discuss

Answer: (b).A program that randomizes parameters of a code Explanation:Metamorphic engines as programs that can analyze and randomize parameters of a malicious code.

Q68.

What are some parameters that can be randomized by a metamorphic engine?

Selection of instructions and registers

Insertion of irrelevant data throughout the program

Reversal of conditional statements

All of the above

Discuss

Answer: (d).All of the above Explanation:Several parameters that can be randomized by a metamorphic engine, including selection of instructions and registers, reversal of conditional statements, insertion of irrelevant data, and randomization of function order.

Q69.

How does reversing a condition affect the program's code?

It adds irrelevant data to the program

It rearranges the program's code

It creates a new function within the program

It does not affect the program's code

Discuss

Answer: (b).It rearranges the program's code Explanation:Reversing a condition can result in significant rearrangement of the program's code, as it forces the metamorphic engine to relocate conditional blocks within a single function.

Q70.

What is garbage insertion?

The removal of irrelevant data from the program

The insertion of irrelevant data throughout the program

The replacement of irrelevant data with useful data

The randomization of function order

Discuss

Answer: (b).The insertion of irrelevant data throughout the program Explanation:Garbage insertion as the random insertion of irrelevant instructions that manipulate data throughout the program.

Page 7 of 10

Low Level Software 🔒

Windows Fundamentals 🔒

Reversing Tools 🔒

Auditing Program Binaries 🔒

Antireversing Techniques 🔒

Breaking Protections 🔒

Reversing .NET 🔒

Deciphering Code Structures 🔒

Deciphering Program Data 🔒

Welcome to the Reversing Malware MCQs Page

Reversing Malware MCQs | Page 7 of 10

Explore more Topics under Reverse Engineering

Introduction to Reverse Engineering

Beyond the Documentation

Deciphering File Formats

Piracy and Copy Protection

Decompilation

Understanding Compiled Arithmetic

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