PT0-003 Exam Dumps - CompTIA PenTest+ Exam

The command xp_cmdshell executes system-level commands from SQL Server. The command whoami /all is used to enumerate user privileges, group memberships, and security contexts on Windows systems.

From the CompTIA PenTest+ PT0-003 Official Study Guide (Chapter 8 – Post-Exploitation Techniques):

“Using xp_cmdshell and system commands like whoami /all allows testers to identify the privilege level of the database user and system access level.”

A peer review process ensures that a penetration test report is accurate, unbiased, and free from errors.

Peer review (Option B):

Senior security professionals verify findings, risk levels, and remediation recommendations.

Reduces the risk of misinterpretation or incorrect data in reports.

A DNS zone transfer attack occurs when a misconfigured DNS server allows attackers to retrieve the entire DNS record set.

Zone transfer (Option A):

The command host -t axfr domain.com dnsl.domain.com requests an AXFR (authoritative transfer) of the DNS records.

This provides subdomains, email servers, and internal DNS records, which attackers can use for reconnaissance.

The immediate and mandatory post-engagement action after completing an authorized penetration test is to remove any accounts, implants, backdoors, web shells, scheduled tasks, or other persistence mechanisms that were created or used during the test. Leaving persistence (a web shell in this case) is exactly what caused the breach and is an unacceptable post-test lapse.

Why B is correct:

Persistence mechanisms provide continued unauthorized access and are a direct security risk if not removed. Removing them returns the environment to its pre-test security posture and prevents later compromise by third parties.

Removal of persistence is a standard requirement in rules of engagement and in post-test cleanup checklists.

Why the other answers are incomplete or secondary:

A. Enable a host-based firewall on the machine — a reasonable defensive step if missing, but it does not replace removing the persistence that was the cause of the breach.

C. Revert configuration changes made during the engagement — also important and should be done, but the highest priority is removing active persistence that gives access. (Both B and C are valid cleanup activities; B is the single best answer given the question.)

D. Turn off command-and-control infrastructure — this is appropriate for the tester’s own infrastructure, but the critical action on the client side is removing client-side persistence. Also, turning off C2 after the test is expected, but will not remediate the remaining web shell on the client.

CompTIA PT0-003 Mapping:

Domain 5.0 Reporting and Communication — post-engagement cleanup and handoff (remediation actions, removal of test artifacts, maintaining chain of custody and evidence, and returning environment to agreed baseline).

An on-path attack (previously known as MITM – Man-in-the-Middle) allows an attacker to intercept and modify communication between two parties.

ARP poisoning (Option B):

Attackers send fake ARP replies to associate their MAC address with the IP address of a legitimate device (e.g., gateway).

This forces traffic to flow through the attacker ' s system, enabling packet capture and manipulation.

Tools like Ettercap, Bettercap, and ARP spoofing scripts are commonly used.