A distributed denial-of-service, or DDoS, attack is basically one of the strongest weapons online. When you read about a site being attacked by hackers, it usually means that it has been a victim of a successful DDoS attack. Basically, in a DDoS, attackers have tried to effectively bring down a server by flooding it with too much active Internet traffic. T
his is a common method used in the attack against government and corporate networks. The way it works is simple: attackers create a large number of bogus Web sites, which are all synchronized with each other, and they all use common programs like the WordPress blog service to post entries and data.
There are different types of DDoS attacks that can be attributed to the WordPress software. These different types are application-layer attacks, application protocol attacks, and cross-site scripting. Each of these has several components that contribute to the seriousness of a DDoS. Let’s take a look at each of these and explore the possible ways they can affect you.
Application-layer attacks occur when attackers try to compromise the security of your servers by exposing sensitive information. An example would be SQL injection, where an attacker can insert malicious code into your server’s database.
Similarly, an application protocol attack can involve the use of scripts to send fake messages to other devices on your network. Cross-site scripting, which refers to an attack on another web server based on content that originates from a specific site, can also cause DDoS attacks.
In order to prevent a DDoS from hitting your business, it’s important to understand the nature of cyber criminals and the methods they use to infiltrate your system. Cyber criminals typically utilise several techniques. Some of these include password cracking, automated scanning, DoS attacks, and denial of service (DoS) attacks.
In order to prevent any of these attacks from happening, it’s important to have your system protected by a reliable provider. There are many DDoS protection providers in the market but only a few of them are highly reliable and effective.
Targeting WordPress. A Content Management System
WordPress is a popular CMS used by millions of users around the world. Because it’s easy to install and use, it attracts a lot of hackers and scammers who want to gain access to your database and other important areas. Because WordPress is used by everyone, it’s also vulnerable to attackers who use downtime or network troubles to overload your server. When this happens, the WordPress system becomes the cyber criminal’s first victim. Many attacks occur during normal everyday activities such as updating WordPress, adding new plugins, or editing a post.
During DDoS attacks, the attacker overloads your server with traffic. Different types of attacks include POP/SMTP floods, TCP flooding, and buffer overflows. An example of a DDoS is when hundreds of thousands of requests are sent to the same server at the same time. In order to prevent such attacks, your system should have several different layers of protection.
Common DDoS Attack Types.
- ICMP (Ping) Flood.
- SYN Flood.
- Ping of Death.
- NTP Amplification.
- HTTP Flood.
- Zero-day DDoS Attacks.
- Volume Based Attacks
What is the most common type of DDoS attack?
Combo SYN flood attacks are responsible for 75% of all large scale network DDoS events (over 20 Gbps). Half of all network DDoS attacks are SYN flood attacks. Large SYN Flood is the single most commonly used attack vector, accounting for 26% of all network DDoS events.
Multi-Vector Attacks Facilitate Hyper Growth
Over 80% of Attacks Use Multi-Vector Approach
Traditionally, DDoS attack campaigns used a single attack type, or vector. However there is an increase in DDoS attacks that use multiple vectors to disable a network or server or servers. They are called multi-vector attacks and consist of a combination of the following: (1) volumetric attacks; (2) State exhaustion attacks; and (3) attacks on the application layer.
The multi-vector approach is very appealing to an attacker, since the tactic can create the most collateral damage to a business or organization. These attacks increase the chance of success by targeting several different network resources, or using one attack vector as a decoy while another, more powerful vector is used as the main weapon.
How can you prevent these types of attacks
First of all, you need to install and use different types of firewalls and antivirus programs to protect your system from malicious attacks. If you’re not familiar how to use firewalls, don’t worry because it won’t affect your basic Internet browsing activities.
Different types of firewalls can be installed automatically by you through your Internet administrator tools. Another option is for you to install a computer application that will perform the task for you. For instance, you can download Distributed Denial-of-Service software that will scan the computer system and block the different types of DDoS attacks. You may also use programs that will prevent the attack from further spreading.
Another layer of protection should be added to your Internet connection. A spam filter should be added to your web server or you can opt to have an automated scanner to check the incoming request to determine whether it’s a safe or malicious target. If the request is deemed unsafe, the response will be a simple error instead of being an error.
There are also available DDoS protection services available to help you detect the source of botnets and DDoS attacks. By implementing the mentioned techniques and using the right applications, you can protect your computer from DDoS attacks and keep your Internet access free and easy.
What is a layer 3 DDoS attack?
What are Layer 3 DDoS attacks? A distributed denial of service (DDoS) attack tries to overload its target with large amounts of data. A DDoS attack is like a traffic jam obstructing a highway, preventing regular traffic from reaching its destination. Layer 3 DDoS attacks target Layer 3 (L3) in the OSI model.
What is a layer 4 DDoS attack?
Layer 3 and Layer 4 DDoS attacks are types of bulk DDoS attacks on the Layer 3 network infrastructure.
(network layer) and 4 (transport layer) DDoS attacks rely on extremely large amounts (streams) of data to slow down
degrade web server performance, consume bandwidth, and ultimately degrade access for legitimate users. These
Attack types usually include ICMP, SYN, and UDP flood.
What is a Layer 7 DDoS attack?
A Layer 7 DDoS attack is a DDoS attack that sends HTTP / S traffic to consume resources and impede a website’s ability to serve content or harm the website owner. The Web Application Firewall (WAF) service can protect HTTP-based Layer 7 resources from Layer 7 DDoS and other attack vectors for web applications.
The Sophistication of Browser-Based Bots
Browser-based bots are made up of segments of malicious software code that run on a web Browser. The bots run during a legitimate web browser session; once the browser is up closed, the bot session will automatically end. Browser-based bots are secret Installed on the computers of unsuspecting users when visiting a malicious website. Several Bots can then simultaneously launch an attack against a targeted server from. start off compromised machines.
Some types of DDoS bots mimic browser behavior, for example, they support cookies to evade protection from DDoS attacks. Bot DDoS attacks target the application layer and are extremely dangerous. dangerous because they do not require large volumes to be successful. It only takes 50 – 100 targeted requests per second to take out a midsize server. Bot attacks are difficult are discovered and often discovered only after the damage has been done.
Identifying layer 7 attacks requires understanding the underlying application. And also requires proper differentiation between malicious bot traffic and regular bot traffic (such as search engine bots) and human traffic. The ability to analyse incoming traffic and assign a contextual risk score based on the visitor’s identity, behaviour and reputation is a
Attacks from Mobile Devices Are Increasing
As markets have become saturated with mobile devices, the number of attacks has significantly increased. With cellular networks offering more Internet bandwidth and faster connectivity, it has become easier for mobile devices to be hijacked and unintentionally used to launch DDoS attacks. Mobile phones and tablets are not immune to malware, and can be easily infected without the knowledge of their owners. They can then be used to download malware and launch DDoS attacks with other hacked mobile devices in the same way, all secretly controlled by the attacker.
Mobile devices are less secure than PCs. Most users don’t install any type of antivirus application on them. Owners also download apps more freely at mobile devices without thinking about security. It makes it easier for malicious apps to jailbreak these devices.
As mobile devices become more ubiquitous and powerful, the number of attacks from: mobile devices are likely to increase rapidly. There is an additional layer of complexity in the mitigation attacks from mobile devices; cellular networks cannot use traditional firewalls to block source IP addresses as they would also affect legitimate traffic
Another Type Of Common Attack – SQL Injection
SQL Injection Vulnerability
SQL Injection vulnerability is one of the most common ways to penetrate a network. SQL Injection allows a user with appropriate programming knowledge to run potentially arbitrary code on database server. If you are not familiar with SQL, you may say that it is nothing more than a complex procedural language used for storing and retrieving data from databases. But the truth is that it is very dangerous and can be used for malicious purposes such as attack on an entire network infrastructure.
SQL Injection attack works through a targeted user account. The SQL Injection vulnerabilities usually take place when web application is executed by incorrect password. The user account which is exploited allows the attacker to read database and execute unwanted commands. The SQL Injection can also happen when web application is executed under false flag of “ioticem” or “exploitable”. The above situations open way for the hackers to gain access to database and carry out their nefarious plans.
The SQL injection vulnerabilities allow attackers to execute malicious scripts and perform multiple attacks on a single database. The user executing the erroneous password can update any database by using schemas and table names. Such a situation can result in the SQL injection attack. When a website tries to retrieve information from database, the process of retrieving is unexpectedly stopped by the system resulting in the compromise of the whole website.
Most of the times users provide correct login information to the website. However, it is not enough to stop there. Most of the time users forget to change password after leaving the website. When this happens, it becomes very easy for the hackers to execute their DDoS attacks against the website. The SQL injection attacks can increase the rate of spam, user generated unwanted response, database corruption and many more.
SQL Injection vulnerabilities can also be done by using a corrupt or wrong SQL command. If the user inputs wrong SQL command in his/her login, it can allow the attacker to have complete control over the database and can perform all his/her evil plans. Most of the time the SQL injection attack happens during the development phase where developers use shortcuts while executing complex transactions.
SQL injection can be done by executing malicious SQL queries. Most of the time the attack happens when a developer uses a wrong delimiter or tab character instead of commas or spaces while executing a certain SQL query. The attacker can use such SQL injection to obtain sensitive information like usernames, passwords, even credit card numbers, from a database of a websites. Most of the time it happens when a developer accidentally uses a backslash or another query mark which is not recognized by the server. SQL Injection flaw can also occur while processing a standard HTML page rather than through an application
5 Famous DDoS Attacks
- Amazon Web Services (AWS) (February 2020)
- GitHub (February, 2018)
- Undisclosed NETSCOUT Client (March 2018)
- Dyn (October, 2016)
- BBC (December, 2015)
Biggest Recorded DDoS attack
The record for the largest DDoS attack ever recorded was a 2.54 Gbps attack hit by Google in September 2017. Amazon also recorded a giant 2.3 Tbps attack in February 2020
How long can DDoS attacks last?
DDoS attacks can last up to 24 hours, and good communication can ensure that costs to your business are kept to a minimum while you remain under attack.
DDoS mitigation refers to a group of computer-networking security measures and/or methods for mitigating or protecting the adverse impact of multiple distributed denial-of-Service attacks (DDoS) on networks attached to the Internet.
These attacks result in a catastrophic reduction in network performance due to excessive network resource consumption, unreliable or slow Internet connection, and other adverse impacts. An attack can have numerous consequences depending on its nature and the geographical area targeted.
DDoS mitigation requires a comprehensive plan that will prevent or mitigate the adverse impact of attacks based on a detailed analysis of the targeted network size, infrastructure, and operation. The mitigation process begins by blocking the attacker’s access to the Internet, preventing him or her from sending packets of targeted data or information to its destination. This blockage is typically provided by one or more network blocklists, IP filters, or security servers. Once this protection has been put in place, a DDoS mitigation strategy can be initiated to deal with the remaining effects of the attack.
Today, there are several modern DDoS attack techniques that are making it increasingly difficult for attackers to target smaller network sizes and more geographically distant locations. For example, a DDoS can take down a medium-sized company’s IT systems, but a group of young hackers with limited experience attacking the same target can easily overcome any measure in place to protect the bigger corporate entity.
In addition, DDoS mitigation has become more advanced, using prevention and protection against specific types of attacks rather than blocking all Internet traffic as was often the case in the past. While blocking all Internet traffic is still a very real possibility for a large company or an international government, today’s modern techniques allow for the more subtle usage of various techniques against specific IP addresses or networks of IP addresses.
The perpetrators of denial of service attacks attempt to make a machine or network resource inaccessible to intended users, either temporarily or indefinitely by disrupting the services of an Internet-connected host. Typically, this is achieved by flooding the target machine or resource with redundant requests to overload the system and prevent some or all legitimate requests from being fulfilled.
A Distributed Denial-of-Service attack occurs when multiple systems invade the bandwidth or resources of a targeted system, often from thousands of malware-infected hosts. Since the inbound traffic flooding the victim comes from different sources, it becomes difficult to distinguish legitimate user traffic from attack traffic, especially when it is spread across multiple points of origin.