Top 10 Common Hacking Techniques You Should Know About in 2025

Using simple hacks, a hacker can learn about your personal unauthorized information which you might not want to reveal. Knowing about these common hacking techniques like phishing, DDoS, clickjacking, etc., could come in handy for your personal safety.

Due to these reasons, it is also important to know some of the hacking techniques that are commonly used to get your personal information in an unauthorized way.

1. Bait and Switch

Using the bait-and-switch hacking technique, an attacker can buy advertising spaces on websites. Later, when a user clicks on the ad, they might be directed to a page that’s infected with malware. This way, they can further install malware or adware on your computer. The ads and download links shown in this technique are very attractive, and users are expected to end up clicking on them.

The hacker can run a malicious program that the user believes to be authentic. This way, after installing the malicious program on your computer, the hacker gets unprivileged access to your computer.

2. Cookie theft

The cookies in our browsers store personal data such as browsing history, usernames, and passwords for different sites we access. Once the hacker gets access to your cookie, he can even authenticate himself as you on a browser. A popular method of carrying out this attack is to manipulate a user’s IP packets to pass through the attacker’s machine.

Also known as SideJacking or Session Hijacking, this attack is easy to carry out if the user is not using SSL (HTTPS) for the complete session. On the websites where you enter your password and banking details, it’s of utmost importance for them to make their connections encrypted.

3. Clickjacking Attacks

Clickjacking is also known by a different name, UI Redress. In this attack, the hacker hides the actual UI where the victim is supposed to click. This behavior is very common on in-app downloads, movie streaming, and torrent websites. While they mostly employ this technique to earn advertising dollars, others can use it to steal your personal information.

In other words, in this type of hacking, the attacker hijacks the victim’s clicks, which aren’t meant for the exact page but for a page where the hacker wants you to be. It works by fooling an internet user into performing an undesired action by clicking on the hidden link.

4. Virus, Trojan, etc.

Viruses or Trojans are malicious software programs that get installed into the victim’s system and keep sending the victim’s data to the hacker. They can also lock your files, serve fraudulent advertisements, divert traffic, sniff your data, or spread on all the computers connected to your network.

You can read the comparison and difference between various malware, worms, trojans, etc., to know more.

5. Phishing

Phishing is a hacking technique in which a hacker replicates the most-accessed sites and traps the victim by sending a spoofed link. Combined with social engineering, it becomes one of the most commonly used and deadliest attack vectors.

Once the victim tries to log in or enters some data, the hacker gets the private information of the target victim using the trojan running on the fake site. Phishing via iCloud and Gmail accounts was the attack route taken by hackers who targeted the “Fappening” leak, which involved numerous Hollywood female celebrities.

6. Eavesdropping (Passive Attacks)

Unlike other attacks that are active in nature, a hacker can use a passive attack to monitor computer systems and networks and gain unwanted information.

The motive behind eavesdropping is not to harm the system but to get some information without being identified. These types of hackers can target email, instant messaging services, phone calls, web browsing, and other methods of communication. Those who indulge in such activities are generally black hat hackers, government agencies, etc.

7. Fake WAP

Just for fun, a hacker can use software to fake a wireless access point (WAP) that connects to the official public WAP. Once you connect to the fake WAP, a hacker can access your data, just like in the case above.

It’s one of the easier hacks to accomplish, and one needs simple software and a wireless network to execute it. Anyone can name their WAP as some legit name like “Heathrow Airport WiFi” or “Starbucks WiFi” and start spying on you. One of the best ways to protect yourself from such attacks is by using a quality VPN service.

8. Waterhole attacks

If you are a big fan of the Discovery or National Geographic channels, you can relate easily to the waterhole attacks. In this case, the hacker poisons a place by hitting the victim’s most accessible physical point.

For example, if the source of a river is poisoned, it will affect the entire stretch of animals during summer. In the same way, hackers target the most accessible physical location to attack the victim. That point could be a coffee shop, a cafeteria, etc.

Once the hacker is aware of your timings, they can use this type of attack to create a fake Wi-Fi access point. Using this, they can modify your most visited website to redirect users to you to get your personal information. As this attack collects information on a user from a specific place, detecting the attacker is even harder. One of the best ways to protect yourself against such types of hacking attacks is to follow basic security practices and keep your software/OS updated.

9. Denial of Service (DoS/DDoS)

A denial-of-service attack is a hacking technique that involves taking down a site or server by flooding it with a huge amount of traffic so that the server is unable to process all the requests in real time and finally crashes.

In this popular technique, the attacker floods the targeted machine with tons of requests to overwhelm the resources, which, in turn, restricts the actual requests from being fulfilled.

For DDoS attacks, hackers often deploy botnets or zombie computers that have only one task: to flood your system with request packets. As malware and hackers advance each passing year, the size of DDoS attacks increases.

10. Keylogger

A keylogger is a simple software that records the key sequences and strokes of your keyboard into a log file on your machine. These log files might even contain your personal email IDs and passwords. Also known as keyboard capturing, it can be either software or hardware. While software-based keyloggers target the programs installed on a computer, hardware devices target keyboards, electromagnetic emissions, smartphone sensors, etc.

Keylogger is one of the main reasons why online banking sites give you an option to use their virtual keyboards. So, whenever you’re operating a computer in a public setting, try to take extra caution.