Important Cisco 300-220 CBRTHD Exam Questions

Answer: C

Explanation:

The pass-the-hash (PtH) technique is classified under Credential Access in the MITRE ATT&CK framework. Specifically, it aligns with the Credential Access tactic (TA0006) and the technique Use Alternate Authentication Material (T1550), sub-technique Pass the Hash (T1550.002). This classification is based on the attacker's primary objective: abusing stolen credential material---in this case, NTLM password hashes---to authenticate to systems without knowing the actual plaintext password.

From a professional cybersecurity and threat hunting perspective, PtH exploits weaknesses in how Windows authentication mechanisms handle credential storage and reuse. When users authenticate to a system, password hashes may be cached in memory or stored in places such as LSASS (Local Security Authority Subsystem Service). If an attacker gains administrative or SYSTEM-level access to a host, they can extract these hashes and reuse them to authenticate to other systems across the environment.

Although pass-the-hash is often observed during lateral movement, MITRE intentionally classifies it under Credential Access because the defining action is the theft and misuse of credential material, not the movement itself. Lateral movement is a downstream outcome enabled by the stolen credentials, but the core technique is about accessing and abusing authentication secrets.

This distinction is important for threat hunters and detection engineers. When hunting for PtH activity, defenders focus on indicators such as abnormal NTLM authentication events, logons using NTLM where Kerberos is expected, reuse of the same hash across multiple systems, and suspicious access to LSASS memory. Endpoint telemetry, Windows Security Event Logs (e.g., Event IDs 4624 and 4672), and EDR memory access alerts are commonly used data sources.

Understanding PtH as a credential access technique helps security teams prioritize protections such as credential guard, LSASS hardening, disabling NTLM where possible, enforcing least privilege, and monitoring authentication anomalies. This classification also reinforces a core professional principle: identity is the new perimeter, and protecting credential material is foundational to modern threat hunting and defense.

Answer: A, C

Explanation:

The correct answers are A. Service and version of the web server and C. Technology used by the application. The error message shown in the exhibit is a classic example of verbose error handling, which unintentionally discloses sensitive internal details about the web application stack.

First, the error page explicitly references Apache Tomcat/6.0.16 at the bottom. This directly exposes the web server/service and its exact version, making Option A correct. From an attacker's perspective, this is valuable intelligence because it allows them to search for known vulnerabilities, exploits, or misconfigurations specific to that version of Tomcat. Older versions of Tomcat, in particular, have a long history of publicly documented security flaws.

Second, the stack trace references components such as:

org.apache.jasper.compiler.*

.jsp files (e.g., /user/left.jsp)

javax.servlet.http.HttpServlet

These details clearly reveal the technology stack used by the application, namely Java Server Pages (JSP) running on Apache Tomcat with Apache Jasper. This confirms Option C as correct. Exposing application technology helps attackers tailor attacks such as deserialization exploits, JSP injection attempts, or framework-specific vulnerabilities.

Option B is incorrect because the error message does not state or imply that Apache Jasper is vulnerable to path injection; it merely shows a compilation/runtime error. Option D is incorrect because the error page provides no information about the client-side browser version---all disclosed details relate to server-side processing.

From a professional security and threat hunting perspective, verbose error messages significantly increase attack surface visibility. Best practices dictate that production systems should return generic error messages to users while logging detailed stack traces internally. This scenario reinforces why proper error handling and information disclosure controls are critical defensive measures.

In summary, the penetration test error message exposes:

The web server service and version

The application technology stack

Therefore, the correct answers are A and C.

Answer: B

Explanation:

The correct answer is endpoint memory access telemetry. Credential dumping often involves accessing sensitive memory regions, such as LSASS, rather than deploying obvious malware.

Modern attackers frequently use:

Legitimate tools

In-memory techniques

Living-off-the-land binaries

These methods bypass file-based detection entirely. Email, DNS, and firewall logs provide limited visibility into memory-level abuse.

Endpoint memory telemetry enables detection of:

Unauthorized LSASS access

Suspicious handle requests

Abnormal process injection

This telemetry is foundational for detecting credential access techniques in modern environments. Therefore, option B is correct.

Answer: A

Explanation:

The correct answer is Exploit public-facing application. The log excerpt in the exhibit clearly shows a malicious HTTP GET request targeting a WordPress plugin PHP file with a crafted SQL injection payload:

UNION ALL SELECT CONCAT(...)

This syntax is a classic indicator of SQL injection, a well-documented attack technique used to exploit insufficient input validation in web applications. According to the MITRE ATT&CK framework, this behavior maps to the Initial Access tactic (TA0001) and the technique Exploit Public-Facing Application (T1190). The attacker is directly interacting with a publicly accessible web service and abusing a vulnerability in the application code to gain unauthorized access.

From a threat hunting and forensic standpoint, this is a textbook example of how attackers commonly achieve initial access to web servers. The attacker did not authenticate via remote services (such as SSH or RDP), nor did they rely on user interaction (as in a drive-by compromise). Instead, they sent a specially crafted request to a vulnerable endpoint exposed to the internet. This makes option B incorrect because External Remote Services requires legitimate service access mechanisms. Option C is also incorrect because Command and Scripting Interpreter is typically used after initial access, once code execution is already achieved. Option D does not apply because there is no evidence of malicious content being delivered to end users.

The forensic team's actions---isolating the server, cloning the disk, and analyzing logs---are standard post-incident procedures to reconstruct the attack chain. Web server access logs are especially valuable in these cases, as they often reveal malicious payloads, attacker IP addresses, targeted endpoints, and timestamps.

For defenders and threat hunters, this scenario reinforces the importance of monitoring web logs for anomalous query strings, enforcing secure coding practices, conducting regular vulnerability scans, and promptly patching third-party plugins. Public-facing applications remain one of the most exploited initial access vectors, making this technique a critical focus area in modern threat hunting programs.

Answer: B

Explanation:

The correct answer is behavioral analysis of outbound traffic patterns. Advanced attackers intentionally use standard protocols such as HTTP and HTTPS to blend exfiltration traffic with normal activity.

Hash-based and signature-based methods are ineffective because:

No malware may be present

Traffic appears legitimate

Infrastructure is frequently rotated

Behavioral analysis detects anomalies such as:

Unusual data transfer volumes

Abnormal session timing

Beaconing patterns

Rare destinations

This approach aligns with network threat hunting best practices and forces attackers to significantly alter behavior, increasing adversary cost.

Therefore, option B is correct.