The meaning of phishing: What is phishing and how to defend against it?
Phishing attacks have increased dramatically in recent years and are now one of the most common cyber threats in the world, with criminals using increasingly sophisticated methods - including attacks powered by artificial intelligence - to obtain sensitive data. But what exactly is phishing and why has it become one of the most common tools used by attackers? In this article, we take a closer look at how phishing works, describe the main types and outline the most important steps to take to prevent it.
What is phishing?
Phishing is a method by which cybercriminals use deceptive messages that appear to be authentic in an attempt to obtain sensitive information such as passwords, credit card details, financial information or personal data.
Attackers pose as a trusted organisation, institution or person in order to trick users into sharing data, downloading a malicious file or opening a manipulated link.
The term "phishing" became widespread in the mid-1990s, when hackers sent out masses of fake emails aimed at "fishing" victims' data. Since then, these methods have evolved considerably and several subtypes have emerged, which will be discussed shortly.
Why is phishing a serious problem?
Phishing is one of the most serious cyber threats, because a single successful attack can cause serious damage and affect individuals and organisations alike. Deceived users' identities can be easily stolen, and their financial data or access codes can fall into the hands of criminals, leading to direct financial loss. In an enterprise environment, the situation is even more serious: sensitive business information, customer data or strategic documents can fall into the wrong hands. A single phishing email can be enough to allow attackers to gain access to your internal network and cause a large-scale data breach. The consequences go far beyond financial damage: loss of trust, legal action and reputational damage can have serious long-term effects.
Types of phishing
Phishing is now much more than simply stealing data or passwords: attackers use a wide range of sophisticated methods.
Now let's look at the most common forms!
E-mail phishing
E-mail phishing is an attack where criminals send out masses of messages that appear to be official and are designed to deceive the user. These emails are often presented in an urgent tone - for example, requesting "immediate action" or a "security check" - and encourage the recipient to click on a link or open an attachment. Once clicked, the user is often taken to a fake website where they can voluntarily provide their login details or financial information. As the attackers are adept at mimicking the communication style of known service providers, users often do not recognise the scam until it is too late.
Spear phishing meaning
Spear phishing is a targeted method that targets specific individuals or organisational roles. Attackers gather information about the target person in advance - for example, from social media or public databases - and then craft a personalised, persuasive message. The aim is often to initiate a financial transaction, obtain sensitive data or open an infected attachment. Because the messages appear credible and relevant, it is much harder for victims to recognise the deception.
Link manipulation
This focuses on a technical solution: attackers create links that deceptively resemble the address of an official website. The difference is often subtle - a typo, an extra character or a different ending in the domain, for example - and easily overlooked by the user. Once clicked, the target person is taken to a fake page that is deceptively similar to the original, so there is a high chance that they will voluntarily give up their details.
Whaling
Whaling is a special form of spear phishing that targets senior executives and decision makers. Attackers send messages requesting urgent financial transfers, internal audits or confidential information. Messages are tailored to appear particularly relevant to the recipient's role. A successful whaling attack can cause serious financial and reputational damage to an organisation.
Content injection
Content injection involves criminals infecting official websites by injecting malicious code. Visitors may then experience pop-ups, fake login panels or redirects to obtain sensitive data. The attack is particularly dangerous because the victim trusts the official site and is not suspicious.
Malware distribution
Phishing messages usually contain malicious links or attachments, which, when opened, deliver malware to the user's device. These can be ransomware, keyloggers or rootkits, which can lead to data theft and further infections. A single infected machine can compromise entire networks and customer databases.
Smishing
Smishing is SMS phishing, where attackers promise fake discounts, prizes or gifts and encourage the recipient to click. The links often lead to deceptive websites used to obtain data or download malicious software. SMS messages appear more personal and therefore users are often less careful, which increases the effectiveness of the method.
Vishing
Vishing is carried out via phone calls, where attackers impersonate a bank administrator or official. They may also use voice distortion devices or pre-recorded messages to make themselves appear authentic. Victims are often prompted to give out their details, such as their bank card number or log-in codes, by the urgent tone of voice.
"Evil Twin" Wi-Fi
Cybercriminals create a fake public Wi-Fi network that deceptively resembles a trusted hotspot. Once unsuspecting users connect, attackers can intercept and record communications, obtaining passwords, bank details or emails. To reduce the risk, it is recommended to use VPNs and avoid public networks for sensitive operations.
Pharming
In pharming, attackers use malicious software or DNS poisoning to trick users into visiting a fake website, even if they have entered the correct address in their browser. On the resulting spoofed page, the unsuspecting user may enter login details or financial information that is then passed directly to the attackers.
Angler phishing
Angler phishing is a form of social media phishing. Attackers disguise themselves as an official customer service account and contact users - for example, in response to a complaint. The aim is to defraud the victim of confidential information or direct them to a deceptive link.
Clone phishing
In this case, a previously delivered e-mail message is copied and its content is modified. Typically, the link or attachment is replaced with a malicious version, while the message is re-sent from a spoofed email address that appears to be the original sender. The effectiveness of this method lies in the fact that the user already knows and trusts the original message and is therefore more likely to open the infected attachment or click on the malicious link.
Watering hole attack
In this case, criminals infect a website that the target group visits regularly. Users are then unknowingly exposed to malicious code that is downloaded to their devices, allowing attackers to obtain data or further compromise the network.
How is phishing being transformed by artificial intelligence?
Artificial intelligence (AI) is taking phishing to a new level by making attacks more sophisticated, personalised and harder to detect. It can analyse vast amounts of public data, allowing criminals to create messages that are perfectly tailored in style and content to the target.
Deepfake technology is used to create authentic-looking voice and video spoofs, which are particularly dangerous in phone and video-based scams. In addition, AI-based chatbots have emerged that can deceive victims for extended periods of time by engaging in natural dialogue. This is further enhanced by the ability of AI to adapt to user reactions in real time and refine attack strategies. This evolution means that phishing attacks are becoming increasingly difficult to detect, and organisations and users need advanced protection solutions and increased vigilance.
How can phishing be prevented?
Preventing phishing attacks requires a complex approach combining technology and user awareness. As phishing is primarily a human attack, education and the development of a security culture are key to its defence.
What to look out for?
- Training of users: Staff in organisations should be aware of the tell-tale signs of phishing messages. Urgent tone, requests for personal information, suspicious links or attachments are all warning signs.
- Secure link management: It is never recommended to sign in via links sent by e-mail. Instead, it is recommended to use the official web address manually entered in the browser.
- E-mail security systems: Advanced filters and AI-based solutions can filter and quarantine suspicious messages before they reach the recipient's inbox.
- Strong password management: Regular password changes and avoiding password reuse will significantly reduce the success rate of attacks.
- Regular updates: Keeping operating systems, applications and firmware up to date eliminates known vulnerabilities that are often exploited by phishing attacks.
- Application of firewalls: Monitoring network traffic and blocking suspicious outbound communications can prevent malware from transmitting data to attackers.
- Detect popups and fake pop-ups: Attackers often manipulate users to open malicious websites or malware. Users should be able to recognise these methods.
- Payment data protection: Credit card information should only be provided on fully trusted websites. Always be wary of suspicious offers, gifts or QR codes.
Overall, technological tools such as filters, firewalls and updates provide an important layer of protection, but the human factor remains the most critical. User education and training is key to ensure that organisations can effectively defend against increasingly sophisticated phishing attacks.
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