An attacker with malicious intent used SYN flooding technique to disrupt the network and gain advantage over the network to bypass the Firewall. You are working with a security architect to design security standards and plan for your organization. The network traffic was captured by the SOC team and was provided to you to perform a detailed analysis. Study the Synflood.pcapng file and determine the source IP address.
Note: Synflood.pcapng file is present in the Documents folder of Attacker-1 machine.
Correct Answer:
B
20.20.10.19 is the source IP address of the SYN flooding attack in the above scenario. SYN flooding is a type of denial-of-service (DoS) attack that exploits the TCP (Transmission Control Protocol) three-way handshake process to disrupt the network and gain advantage over the network to bypass the firewall. SYN flooding sends a large number of SYN packets with spoofed source IP addresses to a target server, causing it to allocate resources and wait for the corresponding ACK packets that never arrive. This exhausts the server’s resources and prevents it from accepting legitimate requests . To determine the source IP address of the SYN flooding attack, one has to follow these steps:
✑ Navigate to the Documents folder of Attacker-1 machine.
✑ Double-click on Synflood.pcapng file to open it with Wireshark.
✑ Click on Statistics menu and select Conversations option.
✑ Click on TCP tab and sort the list by Bytes column in descending order.
✑ Observe the IP address that has sent the most bytes to 20.20.10.26 (target server).
The IP address that has sent the most bytes to 20.20.10.26 is 20.20.10.19 , which is the source IP address of the SYN flooding attack.
Tenda, a network specialist at an organization, was examining logged data using Windows Event Viewer to identify attempted or successful unauthorized activities. The logs analyzed by Tenda include events related to Windows security; specifically, log-on/log-off activities, resource access, and also information based on Windows system's audit policies.
Identify the type of event logs analyzed by Tenda in the above scenario.
Correct Answer:
C
Security event log is the type of event log analyzed by Tenda in the above scenario. Windows Event Viewer is a tool that displays logged data about various events that occur on a Windows system or network. Windows Event Viewer categorizes event logs into different types based on their source and purpose. Security event log is the type of event log that records events related to Windows security; specifically, log-on/log-off activities, resource access, and also information based on Windows system’s audit policies. Security event log can help identify attempted or successful unauthorized activities on a Windows system or network. Application event log is the type of event log that records events related to applications running on a Windows system, such as errors, warnings, or information messages. Setup event log is the type of event log that records events related to the installation or removal of software or hardware components on a Windows system. System event log is the type of event log that records events related to the operation of a Windows system or its components, such as drivers, services, processes, etc.
Grace, an online shopping freak, has purchased a smart TV using her debit card. During online payment, Grace's browser redirected her from ecommerce website to a third-party payment gateway, where she provided her debit card details and OTP received on her registered mobile phone. After completing the transaction, Grace navigated to her online bank account and verified the current balance in her savings account.
Identify the state of data when it is being processed between the ecommerce website and the payment gateway in the above scenario.
Correct Answer:
C
Data in transit is the state of data when it is being processed between the ecommerce website and the payment gateway in the above scenario. Data in transit is data that is moving from one location to another over a network, such as the internet, a LAN, or a WAN. Data in transit can be vulnerable to interception, modification, or theft by unauthorized parties, so it needs to be protected by encryption, authentication, and other security measures . Data at rest is data that is stored on a device or a media, such as a hard drive, a flash drive, or a cloud storage. Data in active is data that is currently being accessed or modified by an application or a user. Data in use is data that is loaded into the memory of a device or a system for processing or computation.
An organization hired a network operations center (NOC) team to protect its IT infrastructure from external attacks. The organization utilized a type of threat intelligence to protect its resources from evolving threats. The threat intelligence helped the NOC team understand how attackers are expected to perform an attack on the organization, identify the information leakage, and determine the attack goals as well as attack vectors.
Identify the type of threat intelligence consumed by the organization in the above scenario.
Correct Answer:
C
Technical threat intelligence is a type of threat intelligence that provides information about the technical details of specific attacks, such as indicators of compromise (IOCs), malware signatures, attack vectors, and vulnerabilities. Technical threat intelligence helps the NOC team understand how attackers are expected to perform an attack on the organization, identify the information leakage, and determine the attack goals as well as attack vectors. Technical threat intelligence is often consumed by security analysts, incident responders, and penetration testers who need to analyze and respond to active or potential threats.
Kayden successfully cracked the final round of interviews at an organization. After a few days, he received his offer letter through an official company email address. The email stated that the selected candidate should respond within a specified time. Kayden accepted the opportunity and provided an e-signature on the offer letter, then replied to the same email address. The company validated the e-signature and added his details to their database. Here, Kayden could not deny the company's message, and the company could not deny Kayden's signature.
Which of the following information security elements was described in the above scenario?
Correct Answer:
B
The correct answer is B, as it describes the information security element that was described in the above scenario. Non-repudiation is an information security element that ensures that a party cannot deny sending or receiving a message or performing an action. In the above scenario, non-repudiation was described, as Kayden could not deny company’s message, and company could not deny Kayden’s signature. Option A is incorrect, as it does not describe the information security element that was described in the above scenario. Availability is an information security element that ensures that authorized users can access and use information and resources when needed. In the above scenario, availability was not described, as there was no mention of access or use of information and resources. Option C is incorrect, as it does not describe the information security element that was described in the above scenario. Integrity is an information security element that ensures that information and resources are accurate and complete and have not been modified by unauthorized parties. In the above scenario, integrity was not described, as there was no mention of accuracy or completeness of information and resources. Option D is incorrect, as it does not describe the information security element that was described in the above scenario. Confidentiality is an information security element that ensures that information and resources are protected from unauthorized access and disclosure. In the above scenario, confidentiality was not described, as there was no mention of protection or disclosure of information and resources.
References: , Section 3.1
