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multiple machines behave abnormally. A sandbox analysis reveals malware. What must the administrator determine next?
A. if Patient 0 still demonstrates suspicious behavior
B. source code of the malicious attachment
C. if Patient 0 tried to connect to another workstation
D. if the file in Patient 0 is encrypted
正解：C
解説：
The key goal during lateral movement analysis is to determine whether the malware spread or attempted to spread beyond the initially compromised system. This is crucial for containment and scoping of the incident.
Logs, sandbox behavior, or network activity may show if Patient 0 initiated outbound connections to other systems, potentially propagating malware across the environment.
Correct answer: D. if Patient 0 tried to connect to another workstation.
質問 # 42
Refer to the exhibit.
According to the Wireshark output, what are two indicators of compromise for detecting an Emotet malware download? (Choose two.)
A. Server: nginx
B. filename= "Fy.exe"
C. Hash value: 5f31ab113af08=1597090577
D. Content-Type: application/octet-stream
E. Domain name:iraniansk.com
正解：C、D
質問 # 43
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. 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.
B. Delete the suspicious email with the attachment as the file is a shortcut extension and does not represent any threat.
C. Quarantine the file within the endpoint antivirus solution as the file is a ransomware which will encrypt the documents of a victim.
D. Open the file in a sandbox environment for further behavioral analysis as the file contains a malicious script that runs on execution.
正解：D
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:WindowsSystem32WindowsPowerShell 1.0powershell.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 # 44
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 PE header.
B. Inspect file hash.
C. Inspect processes.
D. Inspect file type.
E. Inspect registry entries
正解：A、C
解説：
When analyzing suspicious files in a sandbox environment, a security analyst focuses on identifying and evaluating their behavior in a controlled setting to confirm potential malicious activity:
* Inspect processes (B): Observing the processes that the file spawns or injects into during execution helps identify malicious actions or privilege escalation. This is a crucial part of dynamic analysis in the sandbox environment.
* Inspect PE header (E): The PE (Portable Executable) header contains metadata about how the file will execute on Windows systems. It reveals details such as the entry point, libraries used, and whether the file is suspiciously crafted or packed, which can be strong indicators of malicious behavior.
The other options (A, C, D) are important in the broader forensic analysis, but within thesandbox dynamic analysis, focusing on process behavior and file execution headers is critical for determining how the file interacts with the system and whether it is indeed malicious.
Reference:CyberOps Technologies (CBRFIR) 300-215 study guide, Chapter: Understanding Malware Analysis, Dynamic Analysis of Malware, page 389-392.
質問 # 45
Refer to the exhibit.
Which two determinations should be made about the attack from the Apache access logs? (Choose two.)
A. The attacker uploaded the word press file manager trojan.
B. The attacker used the word press file manager plugin to upoad r57.php.
C. The attacker used r57 exploit to elevate their privilege.
D. The attacker performed a brute force attack against word press and used sql injection against the backend database.
E. The attacker logged on normally to word press admin page.
