Assessment type: Problem Based Scenario – individual report and presentation Purpose: This assessment will allow students to demonstrate a Network design based on a real time scenario. This assessment...

Identification of problem
Bank of Adelaide has 4 branches and two branches are implicated by ransomware and DDoS attacks. In DDoS attacks, attackers have flooded the server with internet traffic that prevented users of the bank from accessing the connected online services. This type of attack aims to overwhelm the service, network and device of the intended target with fake internet traffic and rendering the accessibility for user. One of the biggest issues with this attack is that it is hard to identify and it results in slow downloading and uploading speed and the website becomes unavailable to view (Arora, Yadav and Sharma, 2021). It can result in unusual content and media, dropped internet connection and excessive amount of span. In the bank, users cannot access the service because of a DDoS attack that has disrupted the traffic and of the target server, network and service from its surroundings that is flooded with internet traffic. This attack achieves effectiveness by utilizing multiple compromised computer systems as the source of the traffic. It can exploit machines that include network resources and computers. It is like unexpected traffic that can block the network and prevent regular traffic from arriving at the destination system. In this situation, network and server are targeted by the botnet and every bot requests the target IP address or server that can cause the server to become overwhelmed and it results in denial of service. Every bot is a legitimate internet device that separates the attack traffic from the normal traffic.
Melbourne and Sydney branches have also been attacked with ransomware and it can threaten block and public access to the computer system or server as the data becomes encrypted and the victim has to pay ransom to get the data decrypted. In the current scenario, the user of the bank cannot access the system and the bank will have to pay ransom for getting the system free from attackers. The ransomware scans local device and network connected storage that can make the device vulnerable and makes the local network a potential victim. The ransomware can encrypt important and confidential system files and documents that halt productivity and service. Attackers gain access to the data and blackmail victims to pay ransom by threatening to release confidential data in the public (Wani and Revathi, 2020). It has also decreased productivity of a bank and it is the first step to containment and it can impact the organization. Sophisticated attackers can use ransomware with authors for building multiple versions. Variants used in the codebase can have enough function for changing the payload and methods of attack. It can be led when the user authenticates into the dashboard and launches the campaign.
Topology Diagram
Figure 1: Topology Diagram
Proposed solution
The solution for DDoS attacks requires defining a typical internet pattern for the organization. It will help in understanding the normal traffic pattern and the baseline of the traffic. Creating a DDoS plan can help in defining the plan and it can help the organization in responding quickly and efficiently when the network is being targeted. It requires planning and development of complex infrastructure with a detailed response plan. It includes a system checklist, trained response team and well-defined notification. The use of a firewall can help in keeping the server and system from attack (Varalakshmi,...