Whale Phishing

What is a whale phishing attack?

A whale phishing attack, also known as whaling, is a type of phishing attack that targets high-profile employees within a company like executives or other senior staff.

In this type of attack, scammers pretend to be someone the target trusts, such as a coworker or business partner, to trick them into sharing sensitive information or sending money.

Since these high-ranking employees have access to important data and resources, a successful whaling attack can cause serious damage to the company.

How does a whale phishing attack work?

While each attack will be unique, here’s a high-level overview of how they typically work:

Research: The attacker gathers information about the target, such as their role, responsibilities, contacts, and interests. This information is often sourced from OSINT like public records, social media, and the company website.
Crafting the Email: Using the information gathered, the attacker creates a highly personalized and convincing email. This email may appear to come from a trusted source, such as a coworker, vendor, or high-level executive within the organization.
Delivery: The attacker sends the email to the target. The email usually contains a sense of urgency or importance, encouraging the target to act quickly without verifying the email’s contents.
Deception: The email might include a malicious link, an attachment, or a request for sensitive information (e.g., login credentials, financial details). It could also request that the target to authorize a financial transaction or share confidential company information.
Execution: If the target falls for the scam, they might click on the malicious link, open the attachment, provide the requested information, or complete the requested action. This can result in the attacker gaining access to sensitive data, funds, or systems.
Exploitation: The attacker uses the obtained information or access to further their attack. This often includes financial theft, stolen data, or pivoting and furthering their access within the network.

Why are Executives Vulnerable to Whaling Attacks?

There are several reasons executives are particularly vulnerable. These include:

Access to Sensitive Information: Executives often have access to valuable and confidential information, such as financial data, strategic plans, and personal details of employees.
Authority to Make Decisions: Executives have the authority to approve large financial transactions, share sensitive information, and make critical business decisions.
Public Profiles: Executives often have a more visible presence online and in the media, making it easier for attackers to collect personal information about them.
Busy Schedules: Executives typically have busy schedules and tend to make quick decisions. When combined, this makes them more likely to overlook red flags in phishing emails.
Trust in Communication: Communication between executives is often based on trust and familiarity. An email appearing to come from a fellow executive, that sounds like that executive, is less likely to be questioned.

Examples of whale phishing attacks

Here are a few notable examples of whale phishing attacks:

FACC (2016): The Austrian aerospace parts manufacturer FACC fell victim to a whaling attack that resulted in a loss of approximately €50 million. The attackers impersonated the CEO and sent an email to the finance department requesting a large transfer of funds for an acquisition project. The finance department complied without verifying the request.
Ubiquiti Networks (2015): Ubiquiti Networks, a technology company, was targeted by a whaling attack that cost them around $46.7 million. The attackers used spear-phishing emails that appeared to come from the company’s executives, directing employees to transfer funds to fraudulent overseas accounts.
Toyota Boshoku Corporation (2019): The Japanese auto parts manufacturer Toyota Boshoku Corporation was hit by a whaling attack that resulted in a loss of $37 million. Attackers impersonated high-ranking executives and convinced an employee to transfer the funds to a fraudulent bank account.

How to identify a whaling attack

Depending on the level of sophistication used, Identifying whaling attack can be quite challenging. Having said that, there are several clues to look for:

Unusual Requests: Be wary of unexpected requests for sensitive information or financial transactions. This is especially true when they come from high-ranking executives. Verify such requests through a different communication channel.
Urgent and Confidential Tone: Whaling emails often create a sense of urgency or confidentiality to pressure the victim into acting quickly. Be careful of emails that insist on immediate action without following standard procedures.
Inconsistencies in Email Addresses: Check the sender’s email address carefully. Attackers often use email addresses that are very similar to legitimate ones but may have slight variations or misspellings.
Personalized Content: While personalization makes the email seem legitimate, it can also be a sign of a targeted attack. Be cautious if the email includes specific details about your role, recent activities, or personal information that is not commonly known.
Suspicious Links or Attachments: Avoid clicking on links or downloading attachments from emails that seem out of the ordinary or unexpected. Verify the legitimacy of the email before taking any action.
Poor Grammar or Spelling Mistakes: Although whaling emails are often well written, any grammatical errors or spelling mistakes can be red flags.
Unusual Sender Behavior: If the email claims to be from an executive but the tone or language seems inconsistent with their usual communication style, it might be a sign of a whaling attack.
Check Email Headers: Inspect the email headers to verify the authenticity of the sender. Email headers can provide information about the origin of the email and whether it matches the expected source.
Verification Protocols: Establish strict protocols for verifying requests for sensitive information or financial transactions. Encourage employees to confirm such requests through direct communication with the supposed requester.

How to protect your business from whaling attacks

While there is no foolproof way, here are some strategies to keep your organization safe:

Conduct regular training sessions to educate employees, especially executives, about the risks and signs of whaling attacks.
Use simulated phishing exercises to test and reinforce employees’ ability to recognize and respond to phishing attempts.
Enforce multi-factor authentication (MFA) for all sensitive accounts and transactions to add an extra layer of security.
Use a password manager to generate strong, unique passwords.
Establish a protocol for verifying the authenticity of requests for sensitive information or financial transactions. Require confirmation through an alternative communication channel, such as a phone call.
Create a culture where employees can question and verify unusual or suspicious requests, even if they appear to come from senior management.
Implement email authentication protocols like SPF, DKIM, and DMARC. These help prevent email spoofing and ensure that emails are legitimately from the claimed sender.
Use email filtering and anti-phishing solutions to detect and block malicious emails before they reach employees’ inboxes.
Limit access to sensitive information and financial systems to only those employees who need it for their roles.
Regularly review and update access permissions to ensure that only authorized personnel have access to critical systems and data.
Develop an incident response plan that outlines steps to take in the event of a whaling attack. Ensure that all employees are familiar with the plan and know their roles and responsibilities. Conduct simulations to test and improve the plan.
Use threat intelligence and monitoring tools to detect unusual activity and potential threats.
Regularly review logs and alerts for signs of suspicious behavior, such as unauthorized access attempts or unusual transactions.
Ensure that all software and systems are kept up to date with the latest security patches and updates.
Encourage the use of encrypted communication channels for sharing sensitive information.
Avoid using unencrypted email for sending sensitive or financial information whenever possible.