無料300-215サンプル問題で100%カバー率のリアル試験問題（更新された118問あります)
今すぐダウンロード！リアルCisco 300-215試験問題集テストエンジン試験問題
Cisco 300-215 認定試験の出題範囲：
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質問 # 21
Refer to the exhibit.
Which type of code is being used?
- A. Shell
- B. BASH
- C. Python
- D. VBScript
正解：C
質問 # 22
A security team received reports of users receiving emails linked to external or unknown URLs that are non-returnable and non-deliverable. The ISP also reported a 500% increase in the amount of ingress and egress email traffic received. After detecting the problem, the security team moves to the recovery phase in their incident response plan. Which two actions should be taken in the recovery phase of this incident?
(Choose two.)
- A. verify the breadth of the attack
- B. scan hosts with updated signatures
- C. request packet capture
- D. remove vulnerabilities
- E. collect logs
正解：B、D
質問 # 23
What is the transmogrify anti-forensics technique?
- A. changing the file header of a malicious file to another file type
- B. hiding a section of a malicious file in unused areas of a file
- C. concealing malicious files in ordinary or unsuspecting places
- D. sending malicious files over a public network by encapsulation
正解：A
解説：
Reference:
https://www.csoonline.com/article/2122329/the-rise-of-anti-forensics.html#:~:text=Transmogrify%20is% 20similarly%20wise%20to,a%20file%20from%2C%20say%2C%20.
質問 # 24
An engineer received a report of a suspicious email from an employee. The employee had already opened the attachment, which was an empty Word document. The engineer cannot identify any clear signs of compromise but while reviewing running processes, observes that PowerShell.exe was spawned by cmd.exe with a grandparent winword.exe process. What is the recommended action the engineer should take?
- A. Monitor processes as this a standard behavior of Word macro embedded documents.
- B. Upload the file signature to threat intelligence tools to determine if the file is malicious.
- C. Investigate the sender of the email and communicate with the employee to determine the motives.
- D. Contain the threat for further analysis as this is an indication of suspicious activity.
正解：B
質問 # 25
What is the transmogrify anti-forensics technique?
- A. changing the file header of a malicious file to another file type
- B. hiding a section of a malicious file in unused areas of a file
- C. concealing malicious files in ordinary or unsuspecting places
- D. sending malicious files over a public network by encapsulation
正解：A
解説：
Explanation/Reference:
https://www.csoonline.com/article/2122329/the-rise-of-anti-forensics.html#:~:text=Transmogrify%20is%
20similarly%20wise%20to,a%20file%20from%2C%20say%2C%20.
質問 # 26
Refer to the exhibit.
An engineer is analyzing a .LNK (shortcut) file recently received as an email attachment and blocked by email security as suspicious. What is the next step an engineer should take?
- A. Open the file in a sandbox environment for further behavioral analysis as the file contains a malicious script that runs on execution.
- B. Upload the file to a virus checking engine to compare with well-known viruses as the file is a virus disguised as a legitimate extension.
- C. Delete the suspicious email with the attachment as the file is a shortcut extension and does not represent any threat.
- D. Quarantine the file within the endpoint antivirus solution as the file is a ransomware which will encrypt the documents of a victim.
正解：A
解説：
The metadata in the exhibit reveals a strong indicator that this .LNK file (shortcut) is malicious:
* The shortcut file is named "ds7002.pdf" but actually points to the execution of PowerShell:# Full path:
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
* Arguments include:# -noni -ep bypass $z = '...'; indicating an attempt to run a PowerShell script with execution policy bypassed (a known tactic for fileless malware delivery).
* The file is masked as a PDF (common social engineering technique), and PowerShell execution via .
LNK is a signature technique used by many malware families to initiate second-stage payloads or scripts.
Given this, the correct and safest course of action is to:
# Open the .LNK file in a sandbox environment (D).
This enables safe behavioral analysis to observe what actions it attempts upon execution without endangering live systems.
Other options are inappropriate:
* A (ignoring the threat due to extension) is dangerous - .LNKs can trigger code.
* B (upload to virus engine) is only helpful for known malware and lacks behavioral context.
* C (quarantine) is preventive but not investigative - sandboxing provides visibility.
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter on "Threat Hunting and Malware Analysis," section covering shortcut (.LNK) based attacks, PowerShell-based threats, and sandbox behavioral analysis strategies.
質問 # 27
Refer to the exhibit.
Which two actions should be taken as a result of this information? (Choose two.)
- A. Block all emails sent from an @state.gov address.
- B. Update the AV to block any file with hash "cf2b3ad32a8a4cfb05e9dfc45875bd70".
- C. Block all emails with subject containing "cf2b3ad32a8a4cfb05e9dfc45875bd70".
- D. Block emails sent from [email protected] with an attached pdf file with md5 hash
"cf2b3ad32a8a4cfb05e9dfc45875bd70". - E. Block all emails with pdf attachments.
正解：B、D
解説：
The XML (STIX/CybOX format) details anemail-based threatindicator. Specifically:
* Theemail addresscontains "@state.gov" (not exact match, so blocking all @state.gov would be overbroad).
* Theattachment is a PDFfile with a specifiedMD5 hash: cf2b3ad32a8a4cfb05e9dfc45875bd70.
* Theattachment sizeis 87022 bytes.
From a threat mitigation perspective:
* Ais correct: Updating AV to block or flag files matching the malicious hash is a standard response.
* Dis correct: The email address context and hash together provide a precise rule for blocking-this prevents false positives.
Incorrect options:
* Boverreaches by blocking an entire domain without confirming threat context.
* Cwould stop all PDFs, which is impractical.
* Eis incorrect; there is no indication that the hash appears in the subject line.
質問 # 28 
- A. Open the Mozilla Firefox browser.
- B. Validate the SSL certificate for 23.1.4.14.
- C. Initiate a connection to 23.1.4.14 over port 8443.
- D. Generate a Windows executable file.
正解：C
解説：
This Python script uses a combination of libraries (urllib,zlib,base64, andssl) to:
* Disable SSL certificate verification (ssl.CERT_NONEandcheck_hostname=False).
* Construct a custom HTTPS opener with the specified SSL context.
* Add a forgedUser-Agentheader to mimic Internet Explorer 11.
* Connect to the URLhttps://23.1.4.14:8443.
* Download and execute base64-encoded and zlib-compressed content from that URL using:
exec(zlib.decompress(base64.b64decode(...).read()))
This shows a classic example of:
* Downloading payloads from a remote server (23.1.4.14:8443).
* Avoiding detection by disabling SSL verification.
* Executing the payload dynamically withexec()after decoding and decompressing.
The main goal is clearly to initiate a connection to a remote command-and-control (C2) server on port 8443 and download/execute additional code.
Hence, the correct answer is: A. Initiate a connection to 23.1.4.14 over port 8443.
質問 # 29
An investigator is analyzing an attack in which malicious files were loaded on the network and were undetected. Several of the images received during the attack include repetitive patterns. Which anti-forensic technique was used?
- A. tunneling
- B. spoofing
- C. obfuscation
- D. steganography
正解：D
質問 # 30
A security team is discussing lessons learned and suggesting process changes after a security breach incident. During the incident, members of the security team failed to report the abnormal system activity due to a high project workload. Additionally, when the incident was identified, the response took six hours due to management being unavailable to provide the approvals needed. Which two steps will prevent these issues from occurring in the future? (Choose two.)
- A. Automate security alert timeframes with escalation triggers.
- B. Provide phishing awareness training for the fill security team.
- C. Conduct a risk audit of the incident response workflow.
- D. Create an executive team delegation plan.
- E. Introduce a priority rating for incident response workloads.
正解：A、E
質問 # 31
Which magic byte indicates that an analyzed file is a pdf file?
- A. cGRmZmlsZQ
- B. 255044462d
- C. 0a0ah4cg
- D. 0
正解：B
質問 # 32
Refer to the exhibit.
What is the IOC threat and URL in this STIX JSON snippet?
- A. stix; 'http://x4z9arb.cn/4712/'
- B. malware; malware--162d917e-766f-4611-b5d6-652791454fca
- C. malware; x4z9arb backdoor
- D. x4z9arb backdoor; http://x4z9arb.cn/4712/
- E. malware; 'http://x4z9arb.cn/4712/'
正解：B
質問 # 33
A security team is discussing lessons learned and suggesting process changes after a security breach incident.
During the incident, members of the security team failed to report the abnormal system activity due to a high project workload. Additionally, when the incident was identified, the response took six hours due to management being unavailable to provide the approvals needed. Which two steps will prevent these issues from occurring in the future? (Choose two.)
- A. Automate security alert timeframes with escalation triggers.
- B. Provide phishing awareness training for the full security team.
- C. Conduct a risk audit of the incident response workflow.
- D. Create an executive team delegation plan.
- E. Introduce a priority rating for incident response workloads.
正解：D、E
解説：
According to theCyberOps Technologies (CBRFIR) 300-215 study guide, during thepost-incident activity phase, it is critical to analyze lessons learned and update processes to ensure quicker and more efficient response in the future. Specifically:
* Introducing a priority rating for incident response workloads(A) helps address the issue of team members being occupied with other tasks and unable to prioritize abnormal system activity. This ensures incidents are handled based on severity, not just workload.
* Creating an executive team delegation plan(D) addresses the issue of delays due to unavailability of management for approvals. It ensures alternative decision-makers are available for swift action.
These strategies are based on the NIST SP 800-61 Rev. 2 recommendations and are highlighted in the Cisco guide's post-incident activity phase (page 418), which emphasizeslessons learnedand how to reduce detection and response times for future incidents.
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter: Dealing with Incident Response, Post-Incident Activity, page 418.
質問 # 34
A security team received an alert of suspicious activity on a user's Internet browser. The user's anti-virus software indicated that the file attempted to create a fake recycle bin folder and connect to an external IP address. Which two actions should be taken by the security analyst with the executable file for further analysis? (Choose two.)
- A. Analyze the TCP/IP Streams in Cisco Secure Malware Analytics (Threat Grid).
- B. Network Exit Localization in Cisco Secure Malware Analytics (Threat Grid).
- C. Evaluate the process activity in Cisco Umbrella.
- D. Analyze the Magic File type in Cisco Umbrella.
- E. Evaluate the behavioral indicators in Cisco Secure Malware Analytics (Threat Grid).
正解：A、E
解説：
Explanation/Reference:
質問 # 35
A security team receives reports of multiple files causing suspicious activity on users' workstations. The file attempted to access highly confidential information in a centralized file server. Which two actions should be taken by a security analyst to evaluate the file in a sandbox? (Choose two.)
- A. Inspect file hash.
- B. Inspect PE header.
- C. Inspect registry entries
- D. Inspect processes.
- E. Inspect file type.
正解：A、D
解説：
Explanation/Reference: https://medium.com/@Flying_glasses/top-5-ways-to-detect-malicious-file-manually- d02744f7c43a
質問 # 36
Which tool is used for reverse engineering malware?
- A. Ghidra
- B. NMAP
- C. Wireshark
- D. SNORT
正解：A
質問 # 37
A cybersecurity analyst is examining a complex dataset of threat intelligence information from various sources. Among the data, they notice multiple instances of domain name resolution requests to suspicious domains known for hosting C2 servers. Simultaneously, the intrusion detection system logs indicate a series of network anomalies, including unusual port scans and attempts to exploit known vulnerabilities. The internal logs also reveal a sudden increase in outbound network traffic from a specific internal host to an external IP address located in a high-risk region. Which action should be prioritized by the organization?
- A. Focus should be applied toward attempts of known vulnerability exploitation because the attacker might land and expand quickly.
- B. Data on ports being scanned should be collected and SSL decryption on Firewall enabled to capture the potentially malicious traffic.
- C. Threat intelligence information should be marked as false positive because unnecessary alerts impact security key performance indicators.
- D. Organization should focus on C2 communication attempts and the sudden increase in outbound network traffic via a specific host.
正解：D
解説：
According to theCyberOps Technologies (CBRFIR) 300-215 study guidecurriculum, command-and-control (C2) communication is a strong indicator that a system has already been compromised and is actively under the control of an attacker. Sudden outbound traffic to high-risk regions and resolution of known malicious domains are high-confidence signs of an active threat. Therefore, prioritizing detection and disruption of this outbound traffic is critical to prevent further damage or data exfiltration.
While monitoring vulnerability exploitation (B) and gathering port scan data (D) are also valuable, they are more preventive or forensic in nature. The most immediate threat-and therefore the top priority-is stopping active C2 communications.
質問 # 38
Over the last year, an organization's HR department has accessed data from its legal department on the last day of each month to create a monthly activity report. An engineer is analyzing suspicious activity alerted by a threat intelligence platform that an authorized user in the HR department has accessed legal data daily for the last week. The engineer pulled the network data from the legal department's shared folders and discovered above average-size data dumps. Which threat actor is implied from these artifacts?
- A. external exfiltration
- B. malicious insider
- C. internal user errors
- D. privilege escalation
正解：B
質問 # 39
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Cisco 300-215試験は、サイバーセキュリティ操作（Cyberops）の役割でCisco Technologiesを使用して法医学的分析とインシデント対応を実施するために必要なスキルと知識をテストするように設計されています。この試験は、Cisco Certified Cyberops Professional認定の一部であり、サイバーセキュリティインシデント対応と法医学分析のスキルを向上させたい専門家を対象としています。この試験では、脅威インテリジェンス、ネットワーク、エンドポイントのフォレンジック、インシデント対応、イベント相関などのさまざまなトピックに焦点を当てています。
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