PT0-003 Exam Dumps - CompTIA PenTest+ Exam

To detect all open ports and enumerate services, the tester needs to:

Use -sV (Service Version Detection)

Use -Pn (Disables ICMP ping to bypass firewalls)

Use -p- (Scans all 65,535 TCP ports)

nmap -sV -Pn -p- 10.10.10.10 (Option D):

This command performs full-port scanning, including high-numbered ports like 50123/tcp (ms-rpc).

Without -p-, high ports would be missed.

The ms17_010_eternalblue exploit is the most appropriate choice based on the scenario.

Why MS17-010 EternalBlue?

EternalBlue is a critical vulnerability in SMBv1 (port 445) affecting older versions of Windows, including Windows 7.

The exploit can be used to execute arbitrary code remotely, providing shell access to the target system.

Other Options:

A (psexec): This exploit is a post-exploitation tool that requires valid credentials to execute commands remotely.

B (ms08_067_netapi): A vulnerability targeting older Windows systems (e.g., Windows XP). It is unlikely to work on Windows 7.

D (snmp_login): This is an auxiliary module for enumerating SNMP, not gaining shell access.

CompTIA Pentest+ References:

Domain 2.0 (Information Gathering and Vulnerability Identification)

Domain 3.0 (Attacks and Exploits)

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.

To reenter the system remotely after the patch for the recently exploited RCE vulnerability has been deployed, the penetration tester can use schtasks.exe and sc.exe.

schtasks.exe:

Purpose: Used to create, delete, and manage scheduled tasks on Windows systems.

Persistence: By creating a scheduled task, the tester can ensure a script or program runs at a specified time, providing a persistent backdoor.

Example:

schtasks /create /tn "Backdoor" /tr "C:\path\to\backdoor.exe" /sc daily /ru SYSTEM

sc.exe:

Purpose: Service Control Manager command-line tool used to manage Windows services.

Persistence: By creating or modifying a service to run a malicious executable, the tester can maintain persistent access.

Example:

sc create backdoor binPath= "C:\path\to\backdoor.exe" start= auto

Other Utilities:

rundll.exe: Used to run DLLs as applications, not typically used for persistence.

cmd.exe: General command prompt, not specifically used for creating persistence mechanisms.

chgusr.exe: Used to change install mode for Remote Desktop Session Host, not relevant for persistence.

netsh.exe: Used for network configuration, not typically used for persistence.

Pentest References:

Post-Exploitation: Establishing persistence is crucial to maintaining access after initial exploitation.

Windows Tools: Understanding how to leverage built-in Windows tools like schtasks.exe and sc.exe to create backdoors that persist through reboots and patches.

By using schtasks.exe and sc.exe, the penetration tester can set up persistent mechanisms that will allow reentry into the system even after the patch is applied.

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Data Loss Prevention (DLP) tools monitor network traffic and files for sensitive information leaks. The most effective way to bypass DLP is to use encryption, since DLP systems cannot inspect encrypted content.

Option A (Encoding) ❌: Base64 or Hex encoding can sometimes bypass filters, but many DLP tools detect common encoding schemes.

Option B (Compression) ❌: Compression can change file signatures, but modern DLP systems can inspect compressed files.

Option C (Encryption) ✅: Correct.

Strong encryption prevents DLP tools from analyzing file contents.

Option D (Obfuscation) ❌: Code obfuscation may work for source code leaks, but DLP solutions use heuristics to detect patterns.

📖 Reference: CompTIA PenTest+ PT0-003 Official Guide – Bypassing Security Controls

The missing do keyword is the reason for the syntax error. Bash for loops must include a do statement before executing commands within the loop.

Corrected script:

#!/bin/bash

for i in {1..254}; do

ping -c1 192.168.1.$i

done

From the CompTIA PenTest+ PT0-003 Official Study Guide (Chapter 4 – Scanning and Enumeration):

“In Bash scripting, control structures like for-loops require correct syntax, including the 'do' keyword for loop logic to execute properly.”

The unauthorized reprinting of ID badges suggests the penetration tester is attempting physical security penetration testing to gain long-term access.

Option A (Obtain long-term, valid access) ✅: Correct. Cloning or reprinting badges allows persistent access past security checks.

Option B (Disrupt availability) ❌: There is no indication of a denial-of-service attack.

Option C (Change access for valid users) ❌: The goal is not modifying user access, but rather gaining unauthorized access.

Option D (Revoke access for valid users) ❌: The logs show new badges being printed, not revocation.

📖 Reference: CompTIA PenTest+ PT0-003 Official Guide – Physical Security Testing

Shoulder surfing es el método más efectivo en este contexto. Cuando los ejecutivos trabajan en lugares públicos como trenes, un atacante puede visualizar sus pantallas sin ser detectado para recopilar datos confidenciales.

Credential harvesting requiere phishing o explotación directa. Bluetooth spamming y MFA fatigue no aplican directamente en un entorno de observación física.

Referencia: PT0-003 Objective 2.1 – Social engineering and physical observation methods.