Question
a.
It makes it difficult to identify calls from the program into the operating system
b.
It makes it almost impossible to set breakpoints on operating system APIs
c.
It prevents crackers from dumping the entire decrypted program to a file
d.
It increases the memory consumption impact on the program
Posted under Reverse Engineering
Engage with the Community - Add Your Comment
Confused About the Answer? Ask for Details Here.
Know the Explanation? Add it Here.
Q. Why does reencrypting each function create an inconvenience for crackers?
Similar Questions
Discover Related MCQs
Q. What is the obfuscated interface in Defender?
View solution
Q. Why does the obfuscated interface make it difficult for crackers to find important code areas in the target program?
View solution
Q. How does the interface attempt to attach to the operating system?
View solution
Q. How does Defender access the operating system after the user-mode components are copied to a random memory address?
View solution
Q. What impact does the obfuscated interface have on the program's memory consumption and performance?
View solution
Q. How does Defender obfuscate the calls to operating system APIs?
View solution
Q. What is the weakness in Defender's technique of obfuscating API calls?
View solution
Q. What was the purpose of adding the call to IsDebuggerPresent API in Defender?
View solution
Q. What is the impact of obfuscating the interface with the operating system?
View solution
Q. What is the purpose of the Processor Time-Stamp Verification Thread in Defender?
View solution
Q. Why is it important to directly access the hardware time-stamp counter using a low-level instruction in the Processor Time-Stamp Verification Thread?
View solution
Q. What would happen if the encryption on each key function was not implemented in the Processor Time-Stamp Verification Thread?
View solution
Q. What modifications can be made to a time-stamp verification thread to make it more difficult to remove?
View solution
Q. Is the current implementation of the verification thread safe for commercial use?
View solution
Q. What changes should be made to the counter constant in a commercial product environment?
View solution
Q. What priority should the verification thread be set to in a commercial product environment?
View solution
Q. What is the purpose of adding periodical checksum calculations from the main thread?
View solution
Q. Why should the actual checksum verifications be inlined?
View solution
Q. What should be done with the verification thread in a commercial product environment?
View solution
Q. What is the advantage of generating decryption keys in runtime?
View solution
Suggested Topics
Are you eager to expand your knowledge beyond Reverse Engineering? We've curated a selection of related categories that you might find intriguing.
Click on the categories below to discover a wealth of MCQs and enrich your understanding of Computer Science. Happy exploring!
