Phishing attacks cost businesses millions annually (an estimated $4.88M per breach), but not all phishing is the same, or necessarily straightforward to identify. 

While most people will now recognise generic spam emails, spear phishing represents a far more dangerous threat – targeted, personalised attacks designed to fool even security-conscious individuals.

Understanding spear phishing, including how it differs from regular phishing, is essential for protecting your organisation from these sophisticated attacks – especially when combined with phishing simulation testing to proactively identify weaknesses.

Spear phishing meaning

Spear phishing is a highly targeted cyberattack that uses personalised phishing emails or messages to trick specific individuals into revealing sensitive information, downloading malware, or transferring funds. 

Unlike mass phishing campaigns that cast a wide net, spear phishing attacks focus on carefully selected targets within an organisation. The name “spear phishing” reflects the precision of these attacks – like spear fishing, attackers aim at specific targets rather than trawling for whoever might bite. 

In the 2024 State of the Phish Report, 74% of businesses reported a spear phishing attack, making it one of the most prevalent forms of phishing attacks.

How does spear phishing work?

Spear phishing attacks usually follow a calculated process:

1. Target selection: Attackers identify valuable targets – typically employees with access to sensitive data, financial systems, or executive authority

2. Research and reconnaissance: Using LinkedIn, company websites, social media, and other public sources, attackers gather information about their targets, including:

• Name and job title
• Department and responsibilities
• Colleagues and reporting structure
• Recent activities or projects
• Personal interests and connections

3. Impersonation: Armed with this intelligence, attackers craft convincing emails that appear to come from:

• Senior executives (CEO, CFO, department heads)
• Trusted colleagues or business partners
• IT departments or service providers
• Banks or financial institutions
• Clients or customers

4. Social engineering: The email creates urgency, authority, or trust to manipulate the target into taking action without proper verification

5. Exploitation: The target clicks a malicious link, downloads malware, reveals credentials, or authorises fraudulent transactions

Spear phishing vs phishing: Key differences

While both are email-based attacks, spear phishing and regular phishing differ significantly in approach and effectiveness:

The main difference is that regular phishing relies on quantity, while spear phishing relies on quality and precision.

Why spear phishing is so dangerous

Spear phishing poses unique threats that make it particularly effective:

High success rates

The personalised nature of spear phishing dramatically increases success rates. When an email appears to come from your CEO, uses your name, and references projects you’re working on, your natural defences lower. Even security-aware employees can fall victim to well-crafted spear phishing.

Targets high-value individuals

Spear phishing typically targets employees with elevated access:

• C-suite executives: Access to strategic information and financial authorisation
• Finance and accounting staff: Ability to authorise payments and transfers
• IT administrators: System access and credentials
• HR personnel: Employee data and payroll systems
• Executive assistants: Access to executive communications and schedules

Compromising these individuals provides attackers with significant access and authority.

Enables advanced attacks

Spear phishing often serves as the entry point for more sophisticated attacks:

• Business Email Compromise (BEC): Fraudulent wire transfers and payment fraud
• Ransomware deployment: Initial access for ransomware gangs
• Advanced Persistent Threats (APTs): Long-term espionage and data theft
• Supply chain attacks: Compromising organisations to reach their customers

Difficult to detect

Unlike obvious spam, spear phishing emails often:

• Come from apparently legitimate sources
• Use proper grammar and professional formatting
• Reference real projects, people, and events
• Create plausible scenarios
• Bypass many automated security filters

Real-life spear phishing examples

These spear phishing examples show how it affects organisations of all sizes and can result in catastrophic financial losses. 

Ubiquiti Networks

In 2015, attackers targeted Ubiquiti’s finance department with spear phishing emails impersonating senior executives. The fraudsters convinced employees to transfer over $46 million from a Hong Kong subsidiary to accounts controlled by the criminals. The sophisticated emails appeared legitimate and followed normal business processes, making the fraud difficult to detect until the transfers were complete.

FACC Aerospace

The CEO of Austrian aerospace company FACC was fined in 2016, after a spear phishing attack resulted in €50 million in fraudulent transfers. Attackers impersonated executives and convinced finance staff to transfer funds for a fake acquisition project.

Crelan Bank

In 2016, cybercriminals used spear phishing to steal €70 million from Belgian bank Crelan by impersonating bank executives and requesting urgent transfers.

Spear phishing in the age of AI

AI is rapidly increasing the sophistication and scale of spear phishing attacks. What once required hours of manual research and careful writing can now be automated, refined, and executed at speed. 

Attackers are using AI tools to: 

• Generate highly convincing messages: AI can mimic tone, writing style, and business language, producing emails that closely resemble real communications from executives or colleagues
• Automate personalisation at scale: Instead of targeting a handful of individuals, attackers can now create tailored messages for hundreds of thousands of employees using publicly available data
• Impersonate voices and identities: Deepfake audio and AI-generated content can be used in vishing (voice phishing) attacks, making personation even more believable
• Continuously refine attacks: AI can analyse which messages succeed and optimise future campaigns, increasing its effectiveness over time

This evolution blurs the line between traditional phishing and spear phishing. Even ‘generic’ attacks are becoming personalised, making them harder to detect. 

As AI-powered threats grow, organisations must assume that phishing emails will look increasingly legitimate. This makes strong verification processes, employee awareness, and layered security controls more critical than ever.

Common spear phishing tactics

Attackers use various techniques to make spear phishing emails convincing:

CEO fraud (Whaling)

Emails appear to come from the CEO or senior executives requesting urgent wire transfers, often claiming confidentiality to discourage verification.

Vendor email compromise

Attackers compromise or impersonate vendors and suppliers, sending invoices with altered payment details to redirect funds.

Tax season exploitation

HR and finance departments receive emails requesting W-2 forms or payroll information, appearing to come from executives preparing for tax filing.

Urgent account updates

IT department impersonation requesting immediate password changes or account verification, often claiming security incidents.

Document sharing

Emails claiming to share important documents via Dropbox, Google Drive, or OneDrive, leading to credential harvesting pages.

Conference or event follow-up 

Messages referencing real conferences or events the target attended, offering to share presentations or connect with speakers.

How to prevent spear phishing – tips for individuals

Recognise and resist spear phishing attempts with these practices:

• Verify unexpected requests: If an email asks for sensitive information or urgent action, verify through a separate communication channel (phone call to a known number, not replying to the email)
• Examine sender addresses carefully: Hover over the sender name to see the actual email address. Attackers use lookalike domains ([email protected] instead of company.com) or compromised accounts.
• Question urgency and pressure: Legitimate business rarely requires immediate action without proper verification. Urgency is a red flag.
• Inspect links before clicking: Hover over links to see the actual destination URL. Be suspicious of shortened URLs or domains that don’t match the apparent sender.
• Don’t open unexpected attachments: Even if an email appears to come from someone you know, verify via another channel before opening attachments you weren’t expecting.
• Enable multi-factor authentication (MFA): Even if attackers steal your credentials through phishing, MFA prevents account access.
• Trust your instincts: If something feels off about an email – unusual tone, unexpected request, strange timing – verify before acting.

How to prevent spear phishing – tips for businesses

Organisations must implement comprehensive defences against spear phishing:

Security awareness training

Your employees are both your greatest vulnerability and strongest defence. Regular training should cover:

• How to identify spear phishing indicators
• The real consequences of successful attacks
• Proper verification procedures
• Reporting suspicious emails without fear of blame

Generic annual training isn’t sufficient – implement ongoing, engaging education that evolves with emerging threats.

Phishing simulation testing

OnSecurity’s phishing simulation service allows you to test your employees with realistic spear phishing attacks in a controlled environment. Simulations:

• Identify which employees are most vulnerable
• Provide immediate education when someone clicks
• Measure improvement over time
• Create awareness without real-world consequences
• Target specific departments or roles

Real-world practice is far more effective than classroom training alone.

Implement verification procedures

Establish clear protocols for sensitive requests:

• Verbal confirmation via known phone numbers for wire transfers
• Dual authorisation for payments above thresholds
• Verification requirements for credential requests
• Official channels for IT support requests

Make verification the norm, not the exception, regardless of who appears to be making the request.

Technical controls

Deploy security technologies that reduce the success of spear phishing:

• Email authentication: Implement SPF, DKIM, and DMARC to prevent email spoofing and verify sender authenticity
• Advanced email filtering: Use solutions that analyse email content, sender reputation, and links for phishing indicators
• Link protection: Tools that scan links in emails and block malicious destinations
• Multi-factor authentication (MFA): Protect accounts even if credentials are compromised
• Endpoint protection: Detect and block malware from phishing attachments

Limit public information

Reduce the information available for attackers to research targets:

• Review what employee information is publicly accessible
• Educate employees about oversharing on LinkedIn and social media
• Limit organisational charts and detailed role descriptions on websites
• Consider which information genuinely needs to be public

Less available information makes convincing spear phishing harder to craft.

Foster a security-conscious culture

• Encourage reporting of suspicious emails without fear of embarrassment
• Celebrate employees who identify and report spear phishing attempts
• Make security everyone’s responsibility
• Regularly communicate about current threats and tactics
• Lead by example – executives should model verification behaviours

Regular testing and assessment

Beyond phishing simulations, comprehensive social engineering and penetration testing reveal your actual vulnerability:

• Test your defences with sophisticated, targeted attacks
• Identify gaps in procedures and training
• Validate that technical controls work as intended
• Measure organisational resilience

Choose a CREST-certified provider to ensure professional, ethical testing that actually improves your security.

Prepare your team to recognise and resist spear phishing attacks

OnSecurity’s phishing simulation testing provides realistic, safe training that exposes vulnerabilities and builds employee awareness. 

Our simulations mimic real-world spear phishing tactics, giving your team the experience they need to spot threats before clicking. Get an instant quote and strengthen your human security layer today.