Malware Analyst Quiz

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1. Which of the following best describes ‘sandbox evasion’ techniques used by advanced malware?

Compressing the malware file to bypass file size limits in sandbox analysis tools

Detecting the presence of a virtualized environment and altering behavior to avoid detection

Splitting the malware into smaller fragments to evade network-based sandboxes

Encrypting the malware payload to prevent analysis in a sandbox environment

2. Which of the following best describes the purpose of a ‘botnet’?

To conduct distributed denial-of-service (DDoS) attacks, send spam, or mine cryptocurrencies

To manage a network of virtual machines for cloud computing services

To protect websites from malicious traffic and DDoS attacks

To provide a distributed computing platform for scientific research

3. What is ‘DLL Hijacking’ in the context of cybersecurity?

Injecting malicious code into legitimate DLL files

Encrypting DLL files to demand a ransom for decryption keys

Deleting or corrupting DLL files to disrupt system functionality

Exploiting the search order of DLLs to execute malicious code

4. What is the primary goal of ‘heap spraying’ in exploit development?

To protect the heap from being exploited by malware

To free up system memory resources

To allocate large blocks of memory for data storage

To flood the memory with shellcode to facilitate arbitrary code execution

5. You are analyzing a suspicious executable with IDA Pro. You notice several calls to the Windows API functions CreateProcess, WriteFile, and Connect. What could be the possible intention of the malware, and what further steps would you take to confirm your suspicions?

The malware might be trying to communicate with a C2 server. Analyzing network traffic patterns could confirm this.

The executable is likely benign and requires no further analysis.

The malware intends to replicate itself, so you should search for replication mechanisms next.

The malware could be attempting to perform file operations for persistence. Examining file paths and registry entries could provide more insights.

6. What does the term ‘Zero-Day’ exploit refer to?

An exploit that takes advantage of a vulnerability on the same day a software product is released

An exploit for which a patch has been available for zero days

An exploit that targets a previously unknown vulnerability for which there is no patch available

An exploit that targets software vulnerabilities on the day they are publicly disclosed

7. Which technique is commonly used in malware to achieve persistence on a victim’s system?

Creating a hidden user account

Encrypting system files

Modifying system firewall rules

Adding registry entries or scheduled tasks

8. In exploit development, what is the primary purpose of ‘ROP chains’?

To create a sequence of no-operation instructions for padding

To bypass non-executable stack protections by executing existing code sequences

To encrypt exploit code to avoid detection by antivirus software

To facilitate the debugging of exploit code during development

9. You are tasked with analyzing a complex malware sample that employs polymorphic code to evade signature-based detection. What strategies would you employ in IDA Pro to understand and document the polymorphic behavior, and how might this affect your overall analysis process?

Focus solely on the static properties of the malware, ignoring its polymorphic nature.

Rely on dynamic analysis to understand the malware’s behavior, given the difficulty of analyzing polymorphic code statically.

Use IDA Pro’s scripting capabilities to automate the identification and documentation of polymorphic code patterns.

Attempt to manually reverse-engineer each variant of the polymorphic code.

10. Which technique is often used by malware to modify the flow of control within a program without directly modifying its code?

API hooking

Code injection

Buffer overflow

Registry modification

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