2026年最新の300-215プレミアム資料テストPDFの無料問題集お試しセット
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質問 # 26
Forensics Techniques]What is the transmogrify anti-forensics technique?
- A. hiding a section of a malicious file in unused areas of a file
- B. concealing malicious files in ordinary or unsuspecting places
- C. changing the file header of a malicious file to another file type
- D. sending malicious files over a public network by encapsulation
正解：C
解説：
The transmogrify anti-forensics technique refers specifically to the act of modifying the file header of a malicious file to disguise it as another file type. This type of manipulation helps evade detection by signature-based security tools and forensics analysis systems that rely on file headers to determine file type and purpose.
For example, a malicious .exe file might have its header changed to appear as a .jpg or .pdf to trick analysts or automated systems into treating it as benign. This tactic is particularly effective in bypassing content filtering and malware detection solutions that do not perform deep inspection beyond headers.
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter on Obfuscation and Anti- Forensics Techniques.
質問 # 27
Refer to the exhibit.
What should be determined from this Apache log?
- A. The SSL traffic setup is improper
- B. The private key does not match with the SSL certificate.
- C. A module named mod_ssl is needed to make SSL connections.
- D. The certificate file has been maliciously modified
正解：B
解説：
The error logs indicate multiplePKCS12andASN.1 decodingerrors, such as:
* PKCS12 routines:PKCS12_parse:mac verify failure
* rsa routines:old_rsa_priv_decode:RSA lib
* PKCS12 routines:PKCS12_key_gen_uni:malloc
These specific errors most commonly occur when:
* Theprivate key does not correspondto the certificate being used.
* There is amismatchbetween the public and private key pair required for SSL handshakes.
This is a well-documented condition in Apache SSL configuration issues and explicitly covered under TLS
/SSL troubleshooting sections in cybersecurity operations contexts. The Cisco CyberOps guide also notes that SSL errors with key verification usually result from "improper key/certificate pairing" rather than file corruption or missing modules.
Thus, the correct answer is:
B). The private key does not match with the SSL certificate.
質問 # 28
A website administrator has an output of an FTP session that runs nightly to download and unzip files to a local staging server. The download includes thousands of files, and the manual process used to find how many files failed to download is time-consuming. The administrator is working on a PowerShell script that will parse a log file and summarize how many files were successfully downloaded versus ones that failed. Which script will read the contents of the file one line at a time and return a collection of objects?
- A. Get-Content -Directory \Server\FTPFolder\Logfiles\ftpfiles.log | Export-Result "ERROR",
"SUCCESS" - B. Get-Content -ifmatch \Server\FTPFolder\Logfiles\ftpfiles.log | Copy-Marked "ERROR", "SUCCESS"
- C. Get-Content-Folder \Server\FTPFolder\Logfiles\ftpfiles.log | Show-From "ERROR", "SUCCESS"
- D. Get-Content -Path \Server\FTPFolder\Logfiles\ftpfiles.log | Select-String "ERROR", "SUCCESS"
正解：D
解説：
The PowerShell cmdlet Get-Content reads content line-by-line from a file and is commonly used for processing logs or large text files. When combined with Select-String, it can search for specific patterns (such as "ERROR" or "SUCCESS") within those lines and return a collection of matching objects, including metadata like line number and line content.
Option D uses:
* Get-Content -Path: Correct syntax to read the log file from a UNC path.
* Select-String "ERROR", "SUCCESS": Searches for these terms in each line and returns matching lines as structured output.
The other options (A, B, C) use non-existent or incorrect cmdlets/parameters such as Get-Content-Folder, - ifmatch, -Directory, which are invalid in PowerShell.
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter on "Automation and Scripting Tools," which discusses PowerShell usage for forensic log analysis and pattern searching using cmdlets like Get-Content and Select-String.
質問 # 29
Which technique is used to evade detection from security products by executing arbitrary code in the address space of a separate live operation?
- A. token manipulation
- B. GPO modification
- C. privilege escalation
- D. process injection
正解：D
解説：
Explanation/Reference: https://attack.mitre.org/techniques/T1055/
質問 # 30
An engineer is analyzing a DoS attack and notices that the perpetrator used a different IP address to hide their system IP address and avoid detection. Which anti-forensics technique did the perpetrator use?
- A. cache poisoning
- B. encapsulation
- C. spoofing
- D. onion routing
正解：C
解説：
Using adifferent IP addressto disguise the origin of an attack is the definition ofIP spoofing.
"Spoofing involves falsifying data, such as IP or MAC addresses, to hide the source of malicious activity." - Cisco CyberOps guide
質問 # 31
Which tool is used for reverse engineering malware?
- A. NMAP
- B. SNORT
- C. Ghidra
- D. Wireshark
正解：C
質問 # 32
An insider scattered multiple USB flash drives with zero-day malware in a company HQ building. Many employees connected the USB flash drives to their workstations. An attacker was able to get access to endpoints from outside, steal user credentials, and exfiltrate confidential information from internal web resources. Which two steps prevent these types of security incidents in the future? (Choose two.)
- A. Provide security awareness training and block usage of external drives.
- B. Encrypt traffic from employee workstations to internal web services.
- C. Automate security alerts on connected USB flash drives to workstations.
- D. Deploy MFA authentication to prevent unauthorized access to critical assets.
- E. Deploy antivirus software on employee workstations to detect malicious software.
正解：A、D
解説：
The scenario describes an attack vector where insiders or malicious actors useremovable media (USB drives) to introduce malware, which then connects to external sources to exfiltrate data and compromise systems.
* Option B addresses the human factor and technological prevention. The guide stresses the need for training to ensure users are aware of social engineering and removable media risks. Blocking the use of USB drives at a system level further minimizes attack vectors.
* Option E, usingMulti-Factor Authentication (MFA), provides an additional layer of defense. Even if credentials are stolen, MFA can prevent the attacker from accessing sensitive internal resources without the second authentication factor.
These controls align with defense-in-depth strategies recommended in the Cisco CyberOps Associate curriculum to combat insider threats and external unauthorized access.
質問 # 33
Refer to the exhibit.
An HR department submitted a ticket to the IT helpdesk indicating slow performance on an internal share server. The helpdesk engineer checked the server with a real-time monitoring tool and did not notice anything suspicious. After checking the event logs, the engineer noticed an event that occurred 48 hours prior. Which two indicators of compromise should be determined from this information? (Choose two.)
- A. compromised root access
- B. privilege escalation
- C. denial of service attack
- D. malware outbreak
- E. unauthorized system modification
正解：D、E
解説：
According to the event log, a suspicious service was installed (DIAOHHNMPMMRgji) with a service file pointing to a remote share (\\127.0.0.1\admin$\EqnBqKWm.exe). This type of activity strongly suggests:
* A. Unauthorized system modification: Installation of a service without proper authorization, especially with a random or obfuscated name, directly fits the description of system modification. The use of admin$ (administrative share) further implies this wasn't part of standard operations.
* E. Malware outbreak: The use of a service that points to an executable with a seemingly random name and the demand start configuration indicate a potential backdoor or remote-controlled malware. As stated in the Cisco CyberOps Associate guide, event ID 7045 with unusual service names or file paths is a strongIndicator of Compromise (IoC)for malware or persistence mechanisms.
Options like privilege escalation or DoS are not directly evidenced in the event log shown. There's no indication that the LocalSystem account was elevated beyond its default, nor that system resources were overwhelmed (as would be typical in DoS).
質問 # 34
Refer to the exhibit.
What should an engineer determine from this Wireshark capture of suspicious network traffic?
- A. There are signs of a DNS attack, and the engineer should hide the BIND version and restrict zone transfers as a countermeasure.
- B. There are signs of a malformed packet attack, and the engineer should limit the packet size and set a threshold of bytes as a countermeasure.
- C. There are signs of SYN flood attack, and the engineer should increase the backlog and recycle the oldest half-open TCP connections.
- D. There are signs of ARP spoofing, and the engineer should use Static ARP entries and IP address-to-MAC address mappings as a countermeasure.
正解：C
質問 # 35
Drag and drop the capabilities on the left onto the Cisco security solutions on the right.
正解：
解説：
質問 # 36
Refer to the exhibit.
An engineer is analyzing a TCP stream in a Wireshark after a suspicious email with a URL. What should be determined about the SMB traffic from this stream?
- A. It is exploiting redirect vulnerability
- B. It is redirecting to a malicious phishing website,
- C. It is requesting authentication on the user site.
- D. It is sharing access to files and printers.
正解：A
質問 # 37
Refer to the exhibit.
Which type of code is being used?
- A. BASH
- B. VBScript
- C. Python
- D. Shell
正解：C
質問 # 38
Refer to the exhibit.
According to the Wireshark output, what are two indicators of compromise for detecting an Emotet malware download? (Choose two.)
- A. filename= "Fy.exe"
- B. Content-Type: application/octet-stream
- C. Domain name: iraniansk.com
- D. Server: nginx
- E. Hash value: 5f31ab113af08=1597090577
正解：A、C
解説：
From the Wireshark capture:
* A (iraniansk.com): This domain isnot a known legitimate resourceand is hosting a suspicious file named "Fy.exe," strongly indicative of amalware distribution domain.
* D (Fy.exe): TheContent-Disposition: attachment; filename="Fy.exe"header explicitly signals abinary executabledownload, a key indicator in Emotet campaigns.
WhileContent-Type: application/octet-stream(E) is typical of binary data transfers, it isnot uniqueto malware and cannot by itself serve as a strong IoC. Thenginx server (B)andcookie/hash string (C)similarly do not uniquely indicate compromise.
質問 # 39
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. remove vulnerabilities
- B. collect logs
- C. request packet capture
- D. verify the breadth of the attack
- E. scan hosts with updated signatures
正解：A、E
解説：
In therecovery phase, the goal is to restore affected systems to normal operations and ensure the threat has been completely eradicated. According to the CyberOps Associate guide:
"This phase may include restoring data from clean backups, replacing compromised systems, and the re- installation of the Operating System (OS) and applications".
Also:
"During recovery, scanning hosts with updated antivirus and removing vulnerabilities ensures systems do not get reinfected".
質問 # 40
Refer to the exhibit.
Which element in this email is an indicator of attack?
- A. attachment: "Card-Refund"
- B. subject: "Service Credit Card"
- C. IP Address: 202.142.155.218
- D. content-Type: multipart/mixed
正解：A
解説：
According to the Cisco Certified CyberOps Associate guide (Chapter 5 - Identifying Attack Methods), attachments in emails-especially with file extensions like.xlsm-are high-risk indicators when analyzing suspicious or phishing emails. Malicious actors often use macro-enabled Excel files (.xlsm) as a payload delivery mechanism for malware or other exploits. These attachments are typically disguised as legitimate content such as refunds or invoices to trick the recipient into opening them.
The presence of"Card_Refund_18_6913.xlsm"is a strongIndicator of Compromise (IoC), as.xlsmfiles can contain VBA macros capable of executing malicious code. This matches exactly with examples provided in the study material discussing how macro-based payloads are delivered and recognized.
Hence,option Cis the most direct indicator of attack in this email.
質問 # 41
Which scripts will search a log file for the IP address of 192.168.100.100 and create an output file named parsed_host.log while printing results to the console?
- A. Option D
- B. Option B
- C. Option C
- D. Option A
正解：B
解説：
To determine the correct script, we evaluate the following requirements:
* The script must search for the IP address 192.168.100.100.
* The output should be written to a file named parsed_host.log.
* The matching lines should be printed to the console.
Analysis of the options:
* Option A: Correct IP regex used and correct output filename, but reads from parsed_host.log instead of a source log file like test_log.log (not ideal for initial parsing).
* Option C: The IP address used is 192.168.100.101 instead of 192.168.100.100 - incorrect.
* Option D: Same IP address and logic as Option B, but uses print statement without parentheses, which is not valid in Python 3 unless using Python 2 - not ideal.
#Option B:
* Uses correct IP: "192.168.100.100"
* Reads from test_log.log (presumably the source log file).
* Writes to output/parsed_host.log.
* Prints each matching line and writes to output file - satisfying all conditions.
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter on "Investigating Host-Based Evidence and Logs" emphasizes scripting log parsing tasks using Python's regex and file I/O for filtering artifacts like IP addresses. Scripts should ensure proper source log input, pattern matching, result redirection, and optional output logging for forensics analysis.
ChatGPT said:
質問 # 42
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