The term cybersecurity is a process of preventing and recovering networks, programs and devices from any type of cyber-attack. Nowadays, cyber-attacks are increasing the danger to organizations, consumers and employees. They are formed with a purpose to access or destroy sensitive data or information or extort money. In fact, it may also destroy a business’s image and damage individuals’ financial or personal lives.
What would be the best defense? An imperative or efficient cybersecurity system provides several layers of protection spread across networks, computers, and programs. But it has to be considered that a strong cybersecurity system relies not only on cyber defense technology but also on smart cyber defense choices of people.
Before this, it is essential to know various types of cyber threats. In this blog, we’re going to present various cyber-attacks and how to defend yourself against these threats-
- Denial-of-service (DoS) and distributed denial-of-service (DDoS) attacks
This type of attack overwhelms a system’s resources, so it cannot respond to the service request. A denial-of-service attack also attacks your device’s resources but it comes from a large number of other host machines which are infected by malicious software controlled by the attacker. These attacks are formed to increase or gain access, denial of service doesn’t provide direct benefits to attackers. In addition to this, if the attacked resource belongs from a business competitor then benefits of an attacker will be real enough. The further motive of DoS attack is to take a system offline hence to introduce other types of attacks. For example- session hijacking.
There are three main types of DDoS and DoS attacks, such as- TCP SYN flood attack, teardrop attack, smurf attack, ping-of-death attack, and botnets. Among them, under TCP SYN flood attack, the attacker exploits the use of the buffer space at the time of a Transmission Control Protocol session initialization handshake. It targets the system’s small in-process queue with the connection request, but don’t respond when the user of the system replies to those requests. On the other side, the Smurf attack uses IP spoofing and the ICMP in order to saturate a target network with traffic. Basically, these kinds of attacks use ICMP echo requests targeted at broadcast IP addresses. In order to protect your device from smurf attack, you need to disable IP directed broadcasts at the routes.
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2. Man-in-the-middle (MitM) attack
Have you ever face that, you’re on the internet and your PC has various small back-and-forth transactions with servers over the world letting them know who you are and requesting for particular websites. In turn, as if everyone goes as it wants then web servers start responding on your request by giving you the information you is accessing. These kinds of processes occur when you’re just simply browsing or logging into a website with your username and password. Along with this, an attacker also opts to hijack the session so as to put themselves between the requesting computer and the remote server, by pretending other party’s session. The victim computer substitutes its IP address for the trusted clients while the server continues the session n, believing that it is connecting with the client. MitM attack allows the attacker to intercept information in both directions, that’s why it is known as Man-in-the-middle attack.
The attack might unfold like this-
- The client connects to a server
- The attacker’s device get control over the client
- The attacker’s device disconnect the client from the network
- The attackers’ computer replaces the IP address of the client with its own IP address as well as also spoofs the client’s sequence numbers.
- At last, the attacker’s computer begins a dialog with the server and the server believes it is still communicating with the client.
3. Phishing and spear-phishing attacks
This attack is a practice of sending emails which appeared to be from trusted sources with the aim of getting more personal information or appealing users to do something. Phishing attack combines social engineering and technical trickery that could involve an attachment to an email which loaded malware into your device. The attacker devices link with an illegitimate website that tricks you into downloading malware or offering over your personal information.
4. Password attack
As we all know that passwords are the most commonly used mechanism to authenticate users to reach out an information system. Hence, gaining passwords is efficient and common attack approach. In order to obtain an individual’s password attackers looking over the person’s desk, sniffing the connection to the network to get unencrypted passwords. It can be done through by using social engineering and getting access to the database of a password or outright guessing. There are two types of password attacks, such as- brute-force and dictionary attack. The brute-force password guessing implies with acquiring any random approach by implementing different-different passwords and imagines that one can work. Here, the attacker uses some logic to get the person’s password, like- name, DOB, job and so on. Besides this, in dictionary attack- a dictionary of common passwords is acquired in order to get access to the user’s network and computer. One approach is to repeat an encrypted file that carries all passwords, put on a similar encoding to a wordbook of frequently used passwords, and compare the results.
5. Malware attack-
Malicious software may be represented as an unwanted software package that’s put in in your system while not your consent. It will attach itself to legitimate code and propagate; it will lurk in helpful applications or replicate itself across the net. The common types of malware are- macro viruses, file infectors, system or boot-record infectors, polymorphic viruses, Trojans, worms, droppers, and ransomware.
Therefore, mounting a good defense require properly apprehend the offense. As you know that attackers have so many options, i.e. DDoS assaults, man-in-the-middle interception, password attackers and so on to get unauthorized access of critical infrastructure and sensitive information. In order to mitigate yourself from cyber threats, keep the system and anti-viruses up-to-date, the configuration of the firewall, train your employees, keep passwords strong and use the least privilege model within your IT environment, continuous monitor the IT systems and make regular backups against suspicious activity.