Harisa Unblocker - DDoS Attacks

 

WHAT IS DDOS ATTACK

Despite becoming more common, DDoS attacks can be quite advanced and difficult to combat. But what exactly is a DDoS attack and what does DDoS stand for?

DDoS is short for distributed denial of service. A DDoS attack occurs when a threat actor uses resources from multiple, remote locations to attack an organization’s online operations. Usually, DDoS attacks focus on generating attacks that manipulate the default, or even proper workings, of network equipment and services (e.g., routers, naming services or caching services). In fact, that’s the main problem.

Sophisticated DDoS attacks don’t necessarily have to take advantage of default settings or open relays. They exploit normal behavior and take advantage of how the protocols that run on today’s devices were designed to run in the first place. In the same way that a social engineer manipulates the default workings of human communication, a DDoS attacker manipulates the normal workings of the network services we all rely upon and trust.

When a DDoS attack takes place, the targeted organization experiences a crippling interruption in one or more of its services because the attack has flooded their resources with HTTP requests and traffic, denying access to legitimate users. DDoS attacks are ranked as one of the top four cybersecurity threats of our time, 

amongst social engineering, ransomware and supply chain attacks.

 

DDOS VS DDOS ATTACK

It’s important to avoid confusing a DDoS (distributed denial of service) attack with a DoS (denial of service) attack. Although only one word separates the two, these attacks vary significantly in nature.

• Strictly defined, a typical DDoS attack manipulates many distributed network devices in between the attacker and the victim into waging an unwitting attack, exploiting legitimate behavior.
• A traditional DoS attack doesn’t use multiple, distributed devices, nor does it focus on devices between the attacker and the organization. These attacks also tend not to use multiple internet devices.
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  Typical DoS attacks can include the following:

  • Single-source SYN floods: This occurs when an attacker uses a single system to issue a flood attack of SYN packets, manipulating the typical TCP three-way handshake. For example, a SYN flood someone might generate using a Kali Linux computer is not a true DDoS attack because the attack being made is only coming from one device. This is the case even if the attacker uses IP address spoofing. A true DDoS attack is generated by network-level devices, for network-level devices. In other words, you use multiple routers or Memcached servers to attack a network.
  • The “ping of death”: Years ago, some network drivers contained flawed code that would crash a system if it received an ICMP packet that contained certain parameters.
  • The slow loris attack: The slow loris attack is often called a DDoS attack, but because the attack targets a specific server (in this case, a web server) and usually does not use intermediate networking devices, it is typically a traditional DoS attack.

  Each of the above DoS attacks take advantage of software or kernel weaknesses in a particular host. To resolve the issue, you fix the host, and/or filter out the traffic. If you can upgrade a server to mitigate an attack, then it doesn’t qualify as a traditional DDoS attack.

  Remember, in a DDoS attack, the threat actor adopts a resource consumption strategy. This strategy involves using what appears to be legitimate requests to overwhelm systems which are, in fact, not legitimate, resulting in system issues.

WHY SHOULD YOU KNOW ABOUT THIS

DDoS attacks have become increasingly problematic, and IT pros need to be ready.

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  Layer 7 attacks have increased through 2020, going into 2021, according to CloudFlare.
• The number of DDoS attacks over 100 GB/s in volume increased nearly tenfold (967%) in Q1 2020, according to Comparitech.
• The sheer size of volumetric attacks has increased to overwhelming proportions. CloudFlare also reports that 500 Mbps DDoS attacks have become the norm for volumetric attacks.
• DDoS attacks are becoming more common. In 2021, ZDNet has reported that DDoS attacks grew by at least 154% in the previous two years.
• Attacks have become more sophisticated. Attackers have combined DDoS with other types of attacks, including ransomware.
• DDoS attackers have adopted sophisticated artificial intelligence (AI) and machine learning methods to help conduct their attacks. For example, DDoS botnets apply machine learning methods to conduct sophisticated network reconnaissance to find the most vulnerable systems. They also use AI to reconfigure themselves to thwart detection and change attack strategies. Modern attacks will likely manifest as both defenders and attackers pit AI-enabled systems against each other.
• DDoS attackers have adopted a blended attack strategy. They combine various attack methods with social engineering, credential stealing and physical attacks, making the actual DDoS attack only a single factor in a multifaceted approach.

HOW IT CAN AVOID DETECTION?

DDoS attacks are notoriously sly and challenging to identify. The difficulty in determining the source is one of the factors contributing to their slickness. Threat actors often employ three main strategies to carry out a DDoS attack:

1. Spoofing

Both IPv4 and IPv6 lack the ability to verify and track traffic by default. It is quite easy to spoof source and destination addresses, especially on IPv4 networks. DDoS attackers profit from this problem by faking packets with false source addresses. As a result, it is conceivable for an attacker to send millions of answers to a victim host that never actually made a request in the first place in order to deceive trustworthy devices into replying to these packets.

HOW OUR SERVERS SAVES YOU?

 Our servers using IP changer that change your IP so the new ip will let DDOS attackers face difficult to track your IP.