Phishing: what is it, how does it work, and how to protect yourself from these scams

Internet security is one of the greatest challenges of the digital age . Every day, we browse the web, shop online, manage our bank accounts, or check our emails, confident that our data remains private and protected. Yet, cybercriminals continue to operate and employ increasingly sophisticated techniques to steal our information . One of the most frequent and dangerous threats in this area is phishing.

You’d be surprised how easily you can fall victim to phishing if you don’t know how to recognize it . Even if you think you’re safe because you don’t click on suspicious links, the truth is that scammers have perfected their techniques. From emails with logos almost identical to your bank’s to alarmist messages that play on your emotions to trick you into revealing sensitive personal or banking information, scams are everywhere. That’s why it’s essential to learn, clearly and practically, what phishing is, how it works, and how to stay one step ahead of the criminals.

What is phishing and why is it such a widespread threat?

Phishing is a digital fraud technique whose main objective is to obtain users’ confidential data . Hackers typically impersonate businesses, government agencies, banks, or trusted services. Through emails, text messages, phone calls, or fake links, they try to trick us into voluntarily disclosing information such as passwords, credit card numbers, or login credentials for online services .

The term “phishing” comes from the English word “fishing,” referring to the act of luring victims with bait, waiting for them to take the bait. Some claim the word originates from the contraction of “password harvesting fishing,” although this explanation seems more recent than the true origin. Regardless, the root is clear: phishing aims to deceive unsuspecting users in order to steal their personal information.

This threat occupies a prominent place in the world of cybercrime due to its formidable effectiveness and low cost to attackers . Sending thousands of malicious emails or messages is enough to deceive a few victims and induce them to divulge sensitive data. Furthermore, it doesn’t require compromising computer systems, but rather manipulating individuals , making it all the more dangerous for any user, business, or institution.

Historical evolution and origin of phishing

The first phishing attempts were detected in the mid-1990s , but their widespread adoption came years later. The term “phishing” was first used in 1996 on hacking forums to describe account-stealing techniques targeting AOL, a then-popular internet service provider. Hackers impersonated employees and sent messages requesting billing verification, thereby gaining access to their victims’ accounts.

Since then, phishing has evolved considerably in terms of techniques, scope, and sophistication . Today, criminals employ a multitude of methods to attack, ranging from carefully crafted emails to SMS messages, phone calls (vishing), and even QR codes (qrishing), always exploiting the human factor as their primary vulnerability. This versatility has made phishing the most widespread attack technique for stealing data and money from individuals and businesses.

Current impact and scope of phishing

Phishing causes enormous financial losses and severely damages the reputation and security of its victims . According to IBM’s report, “The Cost of a Data Breach,” phishing is the most common data breach vector worldwide, accounting for approximately 15% of security incidents . It is estimated that losses for North American businesses can exceed $4.88 million on average per breach . Individual users can lose access to their email accounts, suffer financial losses, or become victims of identity theft.

Hackers typically target victims ranging from individuals to large organizations and government agencies . A notorious example is the hacking of Hillary Clinton’s 2016 US presidential campaign, where a fake password reset email led to the theft of thousands of confidential emails.

The key to its success lies in the fact that standard security techniques and filters, such as antivirus software or network controls, do not always detect these fraudulent messages . Psychological manipulation is the primary tactic of phishing.

Most commonly used phishing techniques and methods

Phishing is constantly adapting to new digital habits, resulting in countless variations . Among the most common methods are:

• Traditional phishing : Mass emails or SMS messages impersonating legitimate businesses (banks, social networks, online stores), enticing users to click on links and provide personal information on fake websites.
• Vishing : This involves phone calls impersonating trusted personnel (banks, operators, etc.) to obtain confidential data such as passwords, tokens, or other security codes.
• Smishing : A variant using SMS or instant messaging to deceive victims. For example, messages warning of suspicious activity on bank accounts and requesting information to “verify” identity.
• Qrising : Use of manipulated QR codes to redirect to fake websites where personal data is requested or malicious applications are installed.
• URL phishing : Creating links that look legitimate but redirect to fake websites, often masking the URL to make it invisible (spelling mistakes, similar characters, etc.).
• Spear Phishing : Attacks specifically targeting individuals or employees, based on prior research on the victim to personalize the message and increase its credibility.
• Whaling : A variant intended for senior officials or people with access to privileged information, using even more personalized and sophisticated messages.
• Business email compromise (BEC) : Attacks via corporate email to deceive employees and carry out fraudulent transfers or steal key internal data.
• Pharming : Manipulation of DNS systems to redirect users to fake websites without their knowledge.
• Malware-based phishing : Attaching infected files to emails or messages, which, once opened, install malware.
• Tabnabbing : They take advantage of the fact that victims have multiple browser tabs open to modify the content of one of them and simulate the need to log in again, thus stealing the entered credentials.
• Watering hole : Infect websites frequented by employees of a company or organization, to attack regular visitors and capture information.
• Evil twin : Creating fake Wi-Fi access points to steal information from those who connect, believing they are on a legitimate network.

In addition, in recent years, phishing as a service (PHaaS) services have emerged, platforms that allow any cybercriminal, even without in-depth technical knowledge, to automatically launch phishing campaigns by paying a sum of money.

How to identify a phishing message: signs and examples

Detecting a phishing email or SMS is not always easy , but several indicators can alert us:

• Grammar and spelling errors : Large companies rarely make gross errors in their communications, but fraudulent messages are often riddled with obvious flaws.
• Poor quality logos and visuals : Often, the images are pixelated or do not respect the proportions of the original design.
• Suspicious Links If you hover over a link and the URL it displays does not match the actual entity, it is probably a phishing attempt.
• Urgent or alarmist requests : Messages that insist on the urgency of acting quickly, with threats of account blocking, financial loss, legal problems, etc.
• Requests for sensitive personal information: If you are asked for information such as passwords, card numbers, or security questions, be immediately suspicious.
  Typical examples include fake bank account suspension notices, purported tax refunds, confirmations of purchases or transactions not completed, and messages claiming to be from company executives or employees.

  Main objectives and consequences of phishing

  The main goal of phishing is to steal private information for fraudulent purposes . This can manifest as:

  • Theft of money through fraudulent bank transfers or unauthorized purchases.
  • Identity theft to access other services, commit crimes, or sell stolen data on the black market.
  • Extortion through threats or blackmail if sensitive data is obtained.
  • Damage to personal and professional reputation , loss of trust and legal or tax problems.

  In the business world, phishing can lead to enormous financial losses and the loss of critical strategic information. In the worst-case scenario, it can jeopardize business continuity.

  Diversity of attack techniques and increasing sophistication

  Cybercriminals are constantly refining their methods to bypass security systems and deceive even the most cautious users . Among the most sophisticated techniques are:

  • Links that appear legitimate but have fraudulent destinations , often embedded in seemingly harmless images or texts.
  • Malicious attachments that, once opened, install malware on the victim’s device.
  • Data entry forms on websites that perfectly mimic the appearance of official pages.
  • Advanced techniques to evade spam filters and antivirus software , such as embedding malicious messages in images, protecting attachments with passwords, or detecting scans on virtual machines to mask the true content of the attack.

  Phishing is evolving so rapidly that sometimes it is virtually impossible to distinguish a legitimate message from a fake one at a glance .

  Mobile phishing and social networks: new avenues of attack

  The rise of smartphones and social media has opened up new avenues for phishing . Cybercriminals exploit SMS messages, instant messaging, malicious mobile applications, and deceptive social media posts to steal information or infect devices.

  Common examples include messages that appear to be from banks asking you to confirm a suspicious payment, alerts about alleged prices or problems with your account, or fraudulent links in buying and selling apps, restaurant reviews, or even online gaming discussions.

  The speed and informal nature of these channels lead many victims to lower their guard against an apparently “normal” message, which increases the success of attacks.

  How to protect yourself from phishing: key measures and tips

  Besides common sense and caution, several habits and tools can help protect you against phishing . To protect yourself effectively, you should:

  • Always check the origin of messages , avoiding clicking on links or downloading files from unknown or suspicious senders.
  • Be wary of any message that emphasizes urgency or contains obvious errors : spelling, visual, or in the link structure.
  • Never provide confidential information via email or SMS. Legitimate companies never request this information through these channels.
  • Use up-to-date browsers and antivirus software , and enable all recommended protection layers. Some browsers, such as Edge on Windows or Safari on Apple, include specific anti-phishing filters, although they are not foolproof.
  • Protect your passwords by using password managers and always enabling two-step authentication if available.
  • Check the URL of the pages you access, carefully verifying the address before entering any data.

    If in doubt, contact the company or entity directly through its official channels , without using the contact details provided in the suspicious message itself.

    What to do if you are a victim of phishing

    If you think you have been the victim of phishing and have provided sensitive information, act quickly  :

    • Change your password for the service in question immediately and enable two-step authentication if possible.
    • Contact your bank or financial institution to report the incident, block the cards, and report the unauthorized spending. Remember that regulations require banks to be held liable for this type of fraud if it is reported promptly.
    • Perform a thorough scan of your device with an up-to-date antivirus program to detect and eliminate any potential infections.
    • Inform your contacts if you have provided access to email or social media accounts, to prevent others from falling into the trap of emails sent from your profiles.

    If the damages are significant and you are unable to obtain a refund, seek legal advice to defend your rights.

    Phishing and the law: the legal situation in Spain and around the world

    Phishing is considered a crime in many countries , although prosecutions and penalties vary by jurisdiction. In Spain, the law criminalizes the impersonation of websites to obtain personal data and provides for prison sentences and substantial fines. Many other countries (the United States, Colombia, Argentina, etc.) have adopted or proposed specific legislation to punish phishing, while still others use traditional criminal offenses such as fraud to prosecute these cases.

    There are also international organizations and working groups dedicated to combating phishing, such as the Anti-Phishing Working Group, which collaborate with law enforcement and technology companies to shut down fraudulent websites and warn of new threats.

    The importance of training and awareness

    The best weapon against phishing remains knowledge and prevention . Many organizations train their employees to recognize scam attempts and simulate internal phishing campaigns to test their teams’ vigilance and reflexes. These measures have proven very effective, as most phishing attacks only succeed when users let their guard down or ignore the risks.

    Furthermore, despite technological advancements and the integration of intelligent solutions to detect threats (anti-phishing filters, link analysis, sender verification, etc.), no barrier is infallible against the ingenuity of criminals. It is therefore essential to remain vigilant and stay informed of the latest trends to protect yourself.

    Phishing is a digital threat that makes no distinction between individuals and businesses, affecting all devices in the same way. It evolves with technological advancements and exploits the slightest negligence or lack of vigilance to steal our data, our money, or our peace of mind. However, with up-to-date information, best practices, and common sense, it’s possible to minimize the risks and stay one step ahead of cybercriminals . Stay informed, carefully review the messages you receive, and remember: when in doubt, never share your personal information. The first step in protecting your privacy is in your hands.