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問題 #121
The open source TCP/IP network intrusion prevention and detection system (IDS/IPS), uses a rule-driven
language, performs real-time traffic analysis and packet logging is known as:
答案：B
解題說明：
Explanation
問題 #122
An organization's customers are experiencing either slower network communication or unavailability of services. In addition, network administrators are receiving alerts from security tools such as IDS/IPS and firewalls about a possible DoS/DDoS attack. In result, the organization requests the incident handling and response (IH&R) team further investigates the incident. The IH&R team decides to use manual techniques to detect DoS/DDoS attack.
Which of the following commands helps the IH&R team to manually detect DoS/DDoS attack?
答案：B
解題說明：
Thenetstat -ancommand is used to display network connections, routing tables, and a number of network interface statistics. It is particularly useful for identifying unusual volumes of traffic to and from a system, which can be indicative of a DoS/DDoS attack. The option-ashows all active connections and the TCP and UDP ports on which the computer is listening, and-ndisplays addresses and port numbers in numerical form.
This can help the incident handling and response (IH&R) team to identify suspicious patterns, such as a large number of connections from a single source or to a specific port, which are common during DoS/DDoS attacks.
References:The Certified Incident Handler (ECIH v3) program from EC-Council teaches incident handlers about various manual and automated techniques to detect and respond to incidents, including the use of system and network commands likenetstat -anfor identifying signs of DoS/DDoS attacks.
問題 #123
Aaron, a digital first responder, is dispatched to an R & D laboratory after a suspected insider data breach involving intellectual property theft. Upon entering the laboratory, he observes several potential evidence artifacts: fingerprint smudges on the workstation keyboard, oily residue on a DVD near the printer, and an unplugged USB drive sitting on the desk. Realizing the risk of contaminating these artifacts, Aaron takes extra precautions. He documents the position of each item, uses evidence tags and gloves, and carefully covers the surfaces with protective barriers to prevent smearing or accidental contact before secure transportation. He also restricts access to the area until further forensic processing is completed. No devices are powered off or disconnected because his immediate focus is protecting physical trace evidence that could link the incident to a specific individual. Which best practice is Aaron demonstrating?
答案：C
解題說明：
Aaron is preserving trace-level physical evidence that may help establish attribution. ECIH first-response procedures emphasize securing and documenting the incident scene, preventing evidence contamination, recording the original location and condition of items, and preserving evidence before collection and transportation. Fingerprints, residue, and other physical traces can potentially associate a person with devices or media involved in an incident. Wearing gloves, limiting access, documenting positions, and protecting surfaces are therefore appropriate preservation measures. RAM acquisition concerns volatile digital information stored in powered systems and is not the activity described here. Digital chain of custody is important, but the scenario specifically concentrates on preventing contamination of physical traces rather than merely documenting possession of devices. Capturing live sessions is also unrelated. The responder is primarily protecting attribution-relevant physical evidence.
問題 #124
Otis is an incident handler working in the Delmont organization. Recently, the organization is facing several setbacks in the business and thereby its revenues are going down. Otis was asked to take charge and look into the matter. While auditing the enterprise security, he found the traces of an attack where proprietary information was stolen from the enterprise network and was passed on to their competitors.
Which of the following information security incidents did the Delmont organization face?
答案：A
問題 #125
During a routine security audit, an executive's mobile device began exhibiting signs of compromise, including frequent crashes, unrecognized applications, and abnormal data consumption. The organization's IR team conducted multiple antivirus scans and attempted standard malware removal procedures, but the threat continued to persist. Further investigation suggested that the malware was embedded in a background service configured to reinitialize upon reboot. Concerned about the potential risk of data exfiltration or further infection, the team decided to isolate the device and initiate a tailored eradication strategy to remove the threat without activating it. Which eradication step is most appropriate in this situation?
答案：C
解題說明：
The EC-Council Incident Handler (ECIH) curriculum explains that certain advanced mobile malware strains embed themselves as background services configured to restart automatically upon reboot. In such cases, traditional antivirus scans may fail to fully remove the threat because the malicious service remains active.
Switching the mobile device to safe mode (or emergency mode) prevents third-party applications and background services from automatically launching during startup. This isolates the malicious process and prevents it from reinitializing, allowing responders to perform forensic analysis and removal without triggering additional payload execution or data exfiltration.
ECIH emphasizes that during malware eradication, responders must prevent the malware from executing while conducting cleanup procedures. Safe mode supports controlled analysis and minimizes risk during remediation.
Option B (lost device tracking) is a monitoring measure, not an eradication technique. Option C (revoking cloud permissions) is relevant to access control but does not remove embedded malware. Option D (network scans) supports broader investigation but does not directly eliminate the persistent mobile threat.
ECIH guidance for malware eradication includes isolating infected devices, disabling malicious processes, applying clean firmware or OS reinstallation if necessary, and ensuring persistence mechanisms are removed.
Therefore, switching the phone to safe mode before cleanup is the most appropriate eradication step.
問題 #126
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