A manager at a publishing company received an email that appeared to be from one...

This attack was caused by a phishing email containing malware embedded in an Excel spreadsheet. The most effective way to prevent such attacks is employee awareness training, as human error is the leading cause of successful phishing attempts.

Understanding Phishing Attacks:

Phishing emails trick employees into opening malicious links or attachments, leading to malware infections and data breaches.

Cybercriminals often disguise emails as coming from trusted vendors or colleagues.

Why Employee Training is the Most Effective Control:

Employees must be trained to identify suspicious emails, attachments, and links.

Training reduces the likelihood of employees accidentally opening malicious files.

Many cybersecurity frameworks (e.g., NIST, ISO 27001, and CIS) emphasize employee awareness as the first line of defense.

Why the Other Options Are Less Effective Alone:

A. Monitoring network traffic. ❌

Can detect unusual activity after an attack but does not prevent phishing attempts.

B. Using whitelists and blacklists to manage network traffic. ❌

Helps filter harmful websites, but phishing emails often appear legitimate and may bypass filters.

C. Restricting access and blocking unauthorized access to the network. ❌

Helps limit damage after malware enters the network but does not stop employees from opening phishing emails.

IIA GTAG (Global Technology Audit Guide) on Cybersecurity: Recommends employee awareness programs as a key control.

IIA Standard 2110 (Governance): Internal auditors should assess cybersecurity training programs.

NIST Cybersecurity Framework – PR.AT (Protect – Awareness and Training): Emphasizes the role of employee education in preventing cyber threats.

ISO/IEC 27001 – Security Awareness and Training (A.7.2.2): Requires organizations to implement cybersecurity awareness programs.

Step-by-Step Justification:IIA References:Thus, the correct answer is D. Educating employees throughout the company to recognize phishing attacks. ✅