Difficulty: Medium

Average Score: 50%

A computer on a corporate network has a malware infection. Which of the following would be the best method for returning the computer to service?

Rationale

Reformatting the drive and reinstalling the OS is the best method for returning the infected computer to service.

Reformatting the drive ensures that all malware is completely removed, while reinstalling the operating system reinstates a clean environment, free from any malicious software. This approach effectively eliminates the risk of lingering infections that could affect system performance or security.

A (Scanning the system with a Linux live disc, flashing the BIOS, and then returning the computer to service) YOUR ANSWER

While scanning with a Linux live disc can help identify and remove some malware, it might not be comprehensive enough to ensure complete removal. Flashing the BIOS is unnecessary for most malware infections and does not address any issues with the operating system or data on the drive.

B (Flashing the BIOS, reformatting the drive, and then reinstalling the OS) CORRECT

Reformatting the drive is crucial in removing all traces of malware, ensuring a clean slate for the operating system. This choice effectively addresses the infection, as it prepares the system for a fresh installation of the operating system, thereby restoring functionality and security.

C (Degaussing the hard drive, flashing the BIOS, and then reinstalling the OS) YOUR ANSWER

Degaussing the hard drive is an extreme measure that renders the drive unusable by erasing all data magnetically. This method is not practical for simply removing malware and would require replacement of the hard drive, making it an inefficient solution compared to reformatting.

D (Reinstalling the OS, flashing the BIOS, and then scanning with on-premises antivirus) YOUR ANSWER

Reinstalling the OS is a positive step, but flashing the BIOS is generally unnecessary for malware removal. Additionally, scanning with antivirus software after reinstalling does not guarantee that all malware has been eradicated, especially if the original infection compromised the OS before the reinstall.

Conclusion

The most effective method to return a computer on a corporate network, infected with malware, to service is to reformat the drive and reinstall the operating system. This process ensures that all malware is eliminated and provides a stable environment for the user. Other methods may not fully address the infection or could introduce unnecessary complications. By following the correct approach, organizations can enhance their cybersecurity posture and maintain operational integrity.

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