What are DDoS attacks? - Distributed Denial of Service

Prologue

Through the dark chambers of  the internet, unethical users take advantage of web traffic tools which have unimaginable power. With the capacity and capability of 2.3 terabits per second (Tps), enough to leave many networks out. As reported by the AWS (Amazon Web Server) with their migration of this attack however, they disclosed the information with who was targeted.

Distributed Denial of Service attacks are extremely effective at maliciously blocking traffic to a targeted server, network or service by essentially flooding the traffic with blank packets. Routers work by collecting information from packets via the network to a device (which allows the internet to work). Nonetheless this can all be halted when groups, organisations or machines complete a distributed denial of service attack on the intended target.

DDoS attacks obtain it’s effectiveness by utilising multiple compromised operating systems (Generally IoT/Internet of things) to spam the network with numerous unwanted requests -packets- , when this is done, the server can’t compute all the useless request. The server identifies all the new request as ‘normal traffic’ which is why it must read every single packet. Hence slowing the progress and time, creating minor or major lag in the network. 

How do they work?

DDoS attacks work by the intertwine use of connected devices to the internet. The most common way is by infecting vulnerable computers that are connected to the internet such as outdated software/firmware (always update your OS!) and IoT. Attackers infect the machines via using malicious malware such as worms, and RATs/Trojans (Remote Access Tool – It’s called different names but this is the most common), which gives the attacker remote control over that specific computer.

The infected computers are identified as zombies (or bots) once under the control of the ‘bot master’, and a collected group of said bots are called a botnet. Once the computers have been compromised (Whether from a suspicious file, download, and even pictures that has been allocated to your hard drive), it uses the victims IP address to send request over to the servers IP address which then overwhelms the server when done by a collective set of different computers. Successfully completing a Distributed  Denial of Service. 

That was a very basic variant of a DDoS attack, but the truth is their is a variety of attacks they have at their disposable. If you fear that you yourself are in a botnet, then most likely you would be contacted by your ISP or the website being under attack. But a good routinely virus checkup with a service like Malware Bites or Bit Defender can be extremely beneficial at looking out for these Trojans. 

(Screen capture of NanoCore RAT) 

Identifying Attacks

Identifying these attacks can be simple but aggravating. Simply, look out for:

  • odd IP address or IP range
  • the geolocation of the request
  • web browser version and,
  • an uncounted for delay in web page loading time.

To do this at home, download (for easier use) a packet sniffing tool, an example of this would be WireShark which was undoubtedly advanced. Once installed you have the options to chose different networks. Choose the one most appropriate for yourself (probably wifi). Now you done, you can monitor most of the web traffic entering and exiting your router. However, due to the considerable amount of different attack types, it does become easier to specifically diagnose them. We can write an article more on this if you would like and using sniffing tools.

How do people do DDoS attacks?

Usually, (unless the attacker is knowledgeable) the attackers will use web browser base “IP stresses” or “booter(s)” which use proxy servers to send masked request to the victims network. However, some pupils will use the threat of botnets to intimidate the victim. Botnets are thrown around a lot these days, but essentially if someone is threatening you with this, leave immediately and report the user to your ISP and the network you are using (such as a game studio or the console).  Attackers collect your IP (internet protocol) address through packet sniffing tools. On a console they would invite you to a party (which uses a VOIP/voice over internet protocol), from their since both users have the IP address connecting to each other (through servers such as Microsoft Azure), the attacker can view your IP and brutally use it by entering it in a booter or their botnet. If this happens, the best approach will be to immediately contact your ISP and report everything. Remember it is a federal crime.

How do I stay safe out there?

Staying safe in the uncharted environment of the internet may seem menacing at first but realistically isn’t. Due to the attack being a federal crime most people will have the integrity and common sense to not commit it, in addition as an example for games, developers hardly ever use there own servers for connections due to bandwidth requirements. So they use third party services like Microsoft Azure. Essentially a massive data centre with strong ties to the government (hence why you to not want to attack them). It will log the IP address of the attack.

Sadly, DDoSing will possibly never end. But that doesn’t mean we can’t prevent it occurring. The following methods will likely prevent you becoming a victim:

  • VPNs (Virtual Private Networks), we happen to provide some to help you with this!
  • Staying away from sketchy invites or websites and,
  • Not downloading unwanted programs (listen to anti-virus! and update your OS).  

There are possibilities  that companies can delay the attacks as well through services like Cloud Fare or having a net filter… 

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