Whaling is a type of phishing attack that specifically targets high-level executives and decision-makers to steal money or sensitive information. These attacks focus on the biggest targets in your organization, like the CEO, CFO, and other C-suite executives, who have access to highly sensitive financial systems and the authority to sign off on large transactions.

These attacks work because they exploit how executives operate. Leaders often work odd hours, make time-sensitive decisions, and have unique communication patterns. Attackers study these habits and use them to their advantage.

Recent whaling attacks have made headlines and cost organizations serious money. In early 2025, Arup’s Hong Kong office fell victim to an AI-driven whaling scam. Deepfake video and voice clones of executives convinced a finance employee to transfer HK$200 million (US$25.6 million) to fraudsters. 

So, what is the difference between spear phishing and whaling? While whaling targets high-level execs, spear phishing goes after employees throughout the organization, like HR managers, IT administrators, accounts payable staff, or anyone with access to valuable systems and data. These attacks often appear in broader campaigns, with personalized emails impersonating trusted vendors, IT teams, or colleagues, asking recipients to click links, download files, or share credentials. The goal is simple: get just one person to take the bait.

Attackers targeted Microsoft 365 users along with a common subset of brands to socially engineer victims to open their phishing emails. Out of the 285 groups, Microsoft-branded emails were the most common, accounting for nearly 40% of incidents, while DocuSign was the second most common impersonation at nearly 25%. Other brands being mimicked to send malicious emails were Dropbox, Sharefile, Adobe, Paychex, and Apple. —Huntress Cyber Threat Report, 2025

This table highlights the main differences in a whaling attack vs spear phishing, including target selection, attack scale, and tactics used.

So, how does spear phishing damage compare to the damage whaling can do? Sorry to say, they can both be extremely harmful.

Let’s start with the scale of the threat. In 2024 alone, the FBI’s Internet Crime Complaint Center (IC3) logged nearly $2.8 billion in business email compromise (BEC) losses, part of a staggering $16.6 billion total in cybercrime losses for the year.

There’s also reputational damage to consider. Although more difficult to measure in terms of dollars and cents, it is very real. When customers and partners realize your CFO was sending wire transfers to cyber criminals or that employee credentials were being sold on the dark web, your brand suffers. You lose credibility, and partners will question your security hygiene. The regulatory authorities may take notice, too.

Operational costs can also be significant. Incident response, forensics, systems remediation, and regulatory notifications add up quickly. In 2025, the average organization spends 241 days containing a breach. Most of that time is spent in detection and containment. In that time, people aren’t working at full capacity, and no one from the board on down is happy.

There's also the regulatory side to consider. These attacks can trigger GDPR fines, HIPAA violations, or SEC enforcement actions, depending on your industry and the data involved. The compliance costs can end up being more expensive than the initial incident.

Whether it’s a whale phishing vs spear phishing attack, both can lead to serious financial and operational consequences.

Protection from whaling and spear phishing attacks isn’t the responsibility of a single security layer. Effective defenses need to be multi-layered.

• Identity monitoring and authentication: Multi-factor authentication (MFA) must be standard, particularly for financial systems and admin access. Identity threat detection and response (ITDR) solutions identify anomalous authentication behavior before an attacker can enter a network.

• Security awareness training: Security awareness training gives your employees the crucial skills to identify and stop these attacks. Due to their visibility and access, executives face some of the most targeted and severe threats, making their participation absolutely essential. Ensure their training is mandatory and provides targeted material that addresses the unique risks of their role.

• Technical security layers: Email security solutions with sender behavior analysis, domain spoofing detection, and behavioral anomaly flagging are critical. 

• Verification protocols: Put procedures in place to verify high-risk requests and don’t allow wires or system changes through email. Require that both be verified through a separate channel, whether a phone call to a known number, an in-person conversation, or a message on your organization’s internal chat platform.

• Executive protection: Your executives need additional monitoring, given their position of power. Executive identity protection, including dark web monitoring and impersonation alerts, provides early threat detection.

Employees across all levels of your organization need to be protected because threat actors will target every tier of your business.

Our Security Awareness Training (SAT) platform provides ongoing, real-world training to keep your employees sharp and on their toes. Our ITDR solution tracks and analyzes identity behavior, detecting and mitigating threats before they become full-fledged breaches. Combine these measures with the Huntress SIEM platform to monitor threats across your entire network and detect suspicious activity in real time.