What is social engineering and how can they trick you?

La social engineering It's the kind of thing that seems distant until one day you get a call from the "bank," an email from the "tax office," or a message on WhatsApp from a supposed relative asking for money. You don't need to be a computer expert to fall for it: all it takes is trusting the wrong person, replying to a message hastily, or clicking where you shouldn't.

Cybercriminals have learned that it is easier hacking people who hack systemsInstead of battling firewalls and antivirus software, they attack where we are most vulnerable: emotions, carelessness, good faith, or ignorance. That's why we talk about “human hacking"And that's why social engineering is one of the main causes of security breaches today, both for individual users and companies."

What exactly is social engineering?

In cybersecurity, social engineering is the term used to describe the process of... set of psychological manipulation techniques that criminals use to get a person to do something they would not do consciously: hand over confidential data, run a malicious file, authorize a banking transaction, or open the door (digital or physical) to a corporate network.

Instead of exploiting technical flaws, these attacks They take advantage of human errors.Overconfidence, fear, urgency, curiosity, lack of knowledge, or simple tiredness. The attacker impersonates someone trusted (a coworker, family member, support technician, bank employee, courier, government official, etc.) and constructs a believable story to lower the victim's guard.

The ultimate goal can be very varied: identity theft, financial fraud, espionage, sabotage or open the door to more complex attacks, such as ransomware installation on a company network. A single user who gives away their credentials can trigger a critical incident for the entire organization.

For this reason, social engineering is so attractive to criminals: it allows them bypass many of the best technical defenses in one clickA good firewall, robust encryption, and up-to-date antivirus are of little use if an employee gives away their password on a fake website or dictates it over the phone to an imposter.

How a social engineering attack works

Behind every well-executed scam, there's usually a multi-stage process, even if from the outside it appears to be just an email, a call, or a single message. In general, attackers follow a fairly systematic attack cycle that adapts according to the victim and the objective.

First they perform a phase of recognition or preparationThey collect information about the victim or the group they belong to (company, institution, family). This information may come from social media, corporate pages, old data leaks, forums, news, or even observing behavior in public places and digital environments.

With that information, they devise the pretext: they choose what role they will play (support technician, bank employee, supplier, boss, colleague, family member in distress, etc.) and what type of The story will be more believable. for that person in that context. Then they select the most effective channel: mail, phone, SMS, instant messaging, social media, or even an in-person visit.

Then comes the key phase: the infiltration and exploitationThe perpetrator initiates contact and builds trust: they provide information they've researched, mention real names, demonstrate knowledge of company processes, use logos and corporate language, or mimic the tone of someone familiar with the company. When they sense the victim is comfortable, worried, or in a hurry, they make the request: credentials, codes, immediate payment, a file download, a document signature, physical access to a specific area, etc.

Finally, when he has achieved what he was looking for, the phase of untyingThe attacker ends the conversation or simply disappears, sometimes leaving the victim believing everything was legitimate. Other times, they maintain contact for weeks or months to continue extracting information little by little (what is known as “farming"data").

Common channels used by cybercriminals

Social engineering attacks can occur through almost any medium involving human communication. The most frequent targets are those we use daily, which makes the deception less noticeable because It disguises itself among legitimate messages.

Some of the most commonly used channels are:

• Phone calls (vishing): the attacker calls pretending to be the bank, the service company, technical support, the Tax Agency or a family member.
• In-person visitsSomeone shows up at your home or office as a technician, delivery person, supplier, or new employee and asks for access to areas or equipment.
• Instant messaging appsWhatsApp, Telegram, Signal or others, where links, codes or requests for money are sent.
• Emails: classic phishing, with messages that appear to come from companies, administrations, e-commerce platforms or real contacts.
• Social Media: fake profiles or stolen accounts used to launch scams, request data, or spread malicious content.

The channel doesn't matter: the important thing is that the criminal gets one direct interaction with the victim and convince her to act impulsively, without calmly checking if the situation is real.

Most common psychological methods and tactics

The key to social engineering lies not only in the technology, but also in the persuasion techniques and emotional pressure that prevent the victim from thinking clearly. Most attacks combine several of these elements.

Among the most common methods are:

• Pretending to be someone closeA family member, a friend, a coworker, or a boss. Sometimes they use stolen accounts or real information to sound credible.
• Attractive offers and prizes: raffles, exclusive promotions, bonuses, tax refunds or “limited” gifts in exchange for filling out forms or submitting data.
• Impersonating technicians or systems administratorsThey present themselves as support staff who need your password, code, or remote access to "fix a problem."
• Fake forms: surveys, supposed updates of bank, company or social security data, which in reality collect sensitive information.
• Fake software updatesWebsites that suggest downloading a new version of a well-known browser, video player, or application, when in reality they make you install malware.

These tactics are complemented by the intensive use of strong emotionsThe fear of losing money, the urgency to solve a problem, the excitement of winning a prize, or the curiosity about eye-catching content are basic tools used by attackers to disable critical thinking.

Main types of social engineering attacks

There are many forms of social engineering, many of which are combined. Understanding them helps you recognize patterns and be suspicious when something "smells fishy."

Email PhishingThe criminal sends an email that mimics the appearance of a bank, shopping platform, government agency, or well-known company. It asks you to click on a link, download a file, or confirm sensitive information such as passwords, credit card numbers, employment details, or health information. The link leads to a fake website or downloads malware.

Smishing (phishing via SMS or messaging)The messages arrive via SMS or apps like WhatsApp. They are usually short and direct, with an alarmist or promotional tone, and include shortened links. A typical example: an SMS from a parcel delivery company asking you to pay a few cents in fees to release a supposed shipment.

Vishing (voice phishing)Phone call attack. The attacker impersonates a bank, police officer, government agency, technical support, or a family member with an urgent problem. They ask for codes, personal information, access keys, or for you to install an application.

Spear phishingThis is a highly targeted variant of phishing. The perpetrator thoroughly investigates the victim (for example, an executive or someone with access to sensitive information within a company) and prepares an extremely credible and personalized message to steal data or trigger fraudulent payments.

Theft of email or social media accountsOnce they obtain the password for an email or social media account, attackers use that real account to deceive all contactsThey ask for money, send malicious links, or request data under the guise of a trusted person.

Malicious devicesUSB drives or other devices are left in public places or offices for someone to connect to their computer out of curiosity. Doing so executes malware that steals information or opens a backdoor into the internal network.

Fake contests and prizesEmails, messages, or websites informing you that you've won a prize or can obtain an incredible benefit by filling out a form or paying a small amount. The goal is extract the maximum amount of data personal and banking.

Farming: attacks sustained over time where the offender establishes a relationship with the victim (for example, by pretending to be a salesperson, a professional contact or a person offering help) and, through various interactions, gathers increasingly sensitive information.

Scareware or intimidating softwarePop-up windows or emails appear claiming your device is infected or your account has been compromised. They urge you to download a supposed miracle antivirus or enter your credentials to "regain access," when in reality they infect your device or steal your data.

Social engineering in the physical world

Social engineering isn't limited to screens and emails. Many attacks occur in person, in offices, community portals, or public spacesTechnology is only one part; the other is everyday human behavior.

A typical case is the physical access attacksSomeone introduces themselves as an IT technician, auditor, maintenance worker, delivery driver, or even a new employee. Even if their story is vague, they rely on social courtesy and a sense of urgency to avoid being asked for identification. Once inside, they can connect devices, copy information, or move around in areas that should be restricted.

Related to this is the tailgating or “backpacking”: the attacker enters behind an employee, taking advantage of the fact that they open the door with their card. They usually carry boxes, a laptop, or anything that justifies having their hands full and thus avoids having to identify themselves.

Another powerful method is the reciprocal attacks (quid pro quo)They offer you something in exchange for your data. For example, a fake technician who promises to solve a connection problem for free if you give them your password, or a market research company that gives away shopping vouchers to those who complete very invasive surveys about personal data.

Creative cases have also been seen, such as the Fax phishing (emails asking you to print a form and fax it with the access codes) or the distribution of infected CDs by mail, taking advantage of data stolen from customer databases of banks or well-known companies.

The role of artificial intelligence in social engineering

Artificial intelligence has taken these scams to a new level. much higher level of sophisticationWe're no longer talking about poorly written emails and clumsy calls: now attackers can automate and refine scams to the point of making them almost indistinguishable from legitimate communications.

On one hand, AI allows us to create highly personalized phishingBy analyzing social media, forums, and other public sources, algorithms can identify the victim's interests, contacts, job title, routines, or recent events. This information is then used to generate tailored emails or messages with a tone and content that perfectly match their actual situation.

Another worrying development is the deepfakesVideos, audios, or images manipulated using AI to appear real. Today it is possible to recreate the voice of an executive, a family member, or a bank manager from public or stolen recordings, and use it to give orders over the phone or send "authentic" voice messages requesting transfers, codes, or sensitive data.

also appear malicious chatbots Capable of maintaining fluid and convincing conversations, these bots can be integrated into fraudulent support websites, fake social media profiles, or messaging channels. They answer questions, adapt their discourse, and guide the victim to obtain the desired information or action.

To top it all off, the attackers use machine learning algorithms to study how fraud detection systems and corporate defenses work. From blocked attempts, they learn to modify their tactics, timings, texts, and behavior patterns to better evade filters and go undetected.

Social engineering and malware: a dangerous combination

Many of the most damaging attacks combine social engineering with malware distributionThe initial deception is designed to get the victim to download, run, or open an infected file, or to click on a link that leads to a compromised website.

Historically, worms and viruses have spread massively by exploiting users' curiosity, romanticism, or fear. A classic example is the LoveLetter wormIn 2000, this worm crashed email servers worldwide with an email containing a supposed love letter as an attachment. Upon opening it, the worm automatically forwarded itself to all contacts in the address book.

Other famous cases are Mydoom, which masqueraded as technical messages from the mail server, or SwenIt came disguised as a Microsoft security patch. Many people, believing it was an important update, ran the file and became infected.

The distribution channels for malicious links are very varied: email, instant messaging, chat rooms, SMS, P2P networks where attackers name the files with very attractive titles (for example "key generator", "game crack" or adult content) so that users will download them.

In some attacks, the criminals even play with the victim's shame so they won't report it. They offer tools to access paid services for free, credit card generators, or methods to inflate online account balances. When the user runs the supposed "trick" and gets infected with a Trojan, they are less likely to notify the company or the authorities for fear of admitting they were looking for something illegal.

All this shows the extent to which social engineering is a ideal entry point for malwareWithout a robust security solution on computers and mobile devices, and without prudent habits, the chances of infection skyrocket.

Signs to detect possible attacks

The best defense is learning to detect alarm signals Before you react. Attackers expect you to respond automatically, so the most effective thing you can do is pause for half a second and calmly assess the situation.

Some useful questions to ask yourself are:

• Am I experiencing very intense emotions? If you feel scared, very nervous, euphoric, or rushed, you're more likely to make mistakes. That state, in itself, is a sign that someone might be trying to manipulate you.
• Is the sender really who they claim to be? Carefully examine email addresses, phone numbers, and profiles. Sometimes they change a single letter in a domain or duplicate the photo and name of a real contact.
• Can this person prove their identity? If it's a call or a visit, ask them to identify themselves and verify through another channel (for example, by calling the entity's official number, not the one they give you).
• Does the website have any strange features? Strange URLs, spelling mistakes, old or misplaced logos, design errors… all of these can indicate that the page is a fraudulent copy.
• Does the offer sound too good to be true? If something seems like an incredible bargain, there's usually a catch. Think about what the other party really gains by giving you something of such value.
• Does the link or attachment have a suspicious name? Vague, strange, or irrelevant names are reason enough not to open or click on them.

Over time, something like a "radar" develops, triggering when something seems off. This instinct, supported by basic cybersecurity training, is one of the more effective barriers against social engineering.

How to protect yourself from social engineering in your daily life

There is no magic tool that blocks all social engineering attacks, because the link being exploited is you, not the system. Protection involves combining good practices, common sense and certain technical measures that minimize the impact if something goes wrong.

On a personal level, it is essential to follow some basic habits:

• Do not share personal information with strangers By phone, email, messaging, or social media. No reputable bank or government agency will ever ask for your password or PIN through those channels.
• Configure your network privacy settings properly. So that not everyone can see your date of birth, address, place of work, or family information. That information is then used to personalize the scams.
• Learn about these types of threatsAwareness campaigns, official resources and training help to recognize patterns.
• Use strong and unique passwords for each service, and rely on a password manager to avoid going crazy.
• Enable two-factor authentication (2FA) Whenever possible. Even if someone gets hold of your password, they'll still need the second factor.

It's also a good idea to be very selective about what you post: pet names, schools, first cars, or cities where you were born are often used as security questions or parts of passwordsSo it's best if they're not visible to just anyone, or even if you use fake answers that are easy to remember just for yourself.

Best practices in networks, devices and accounts

In addition to your behavior, how you configure your network and devices makes a difference. There are a few simple steps you can take to strengthen your protection against social engineering attacks.

With regards to network you use:

• Don't let just anyone connect to your main Wi-Fi; create a guest network for visitors.
• Use one VPN on public or shared connections to encrypt your traffic and make interception more difficult.
• Protect all connected devices: router, car multimedia system, cameras, home automation, cloud services… Any vulnerability in them can be used to gather information about you.

Regarding the devices:

• Install a comprehensive security software capable of detecting malware, phishing blocks, and suspicious behavior.
• Do not leave your devices unlocked or unattended in public places or in the office.
• Maintain the operating system and applications updated to the latest versionMany updates fix vulnerabilities that attackers try to exploit.
• Check from time to time if your email appears in known data breaches and change passwords if necessary.

At the business level, all of this is reinforced by clear security policies, ongoing employee training, and phishing drills that help practice detecting attempts at deception without real risk.

Social engineering doesn't need sophisticated techniques to work; it's enough that someone, on a bad day, I replied to a message without thinking too much.But the more aware we are of these risks, the harder we make it for cybercriminals and the less chance they have of turning a simple email or call into a serious security problem.